version bump

move cocoapods.yml
version bump
2026-01-13 23:23:29 +01:00 · 2017-09-22 23:43:19 +09:00 · 2017-09-22 23:41:07 +09:00 · 2017-09-22 23:26:15 +09:00 · 2017-09-22 15:48:02 +09:00 · 2017-09-08 01:28:24 +09:00
35 changed files with 1415 additions and 1157 deletions
--- a/.cocoapods.yml
+++ b/.cocoapods.yml
@@ -0,0 +1,2 @@
+try:
+  project: 'CoreStore.xcworkspace'
--- a/CoreStore.podspec
+++ b/CoreStore.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
    s.name = "CoreStore"
-    s.version = "4.0.5"
+    s.version = "4.1.3"
    s.license = "MIT"
    s.summary = "Unleashing the real power of Core Data with the elegance and safety of Swift"
    s.homepage = "https://github.com/JohnEstropia/CoreStore"
--- a/CoreStore.xcodeproj/project.pbxproj
+++ b/CoreStore.xcodeproj/project.pbxproj
@@ -242,6 +242,10 @@
 		B53B27601EE3B92E00E9B352 /* CoreStoreManagedObject.swift in Sources */ = {isa = PBXBuildFile; fileRef = B53B275E1EE3B92E00E9B352 /* CoreStoreManagedObject.swift */; };
 		B53B27611EE3B92E00E9B352 /* CoreStoreManagedObject.swift in Sources */ = {isa = PBXBuildFile; fileRef = B53B275E1EE3B92E00E9B352 /* CoreStoreManagedObject.swift */; };
 		B53B27621EE3B92E00E9B352 /* CoreStoreManagedObject.swift in Sources */ = {isa = PBXBuildFile; fileRef = B53B275E1EE3B92E00E9B352 /* CoreStoreManagedObject.swift */; };
+		B53CA9A21EF1EF1600E0F440 /* PartialObject.swift in Sources */ = {isa = PBXBuildFile; fileRef = B53CA9A11EF1EF1600E0F440 /* PartialObject.swift */; };
+		B53CA9A31EF1EF1600E0F440 /* PartialObject.swift in Sources */ = {isa = PBXBuildFile; fileRef = B53CA9A11EF1EF1600E0F440 /* PartialObject.swift */; };
+		B53CA9A41EF1EF1600E0F440 /* PartialObject.swift in Sources */ = {isa = PBXBuildFile; fileRef = B53CA9A11EF1EF1600E0F440 /* PartialObject.swift */; };
+		B53CA9A51EF1EF1600E0F440 /* PartialObject.swift in Sources */ = {isa = PBXBuildFile; fileRef = B53CA9A11EF1EF1600E0F440 /* PartialObject.swift */; };
 		B53FB9FE1CAB2D2F00F0D40A /* CSMigrationResult.swift in Sources */ = {isa = PBXBuildFile; fileRef = B53FB9FD1CAB2D2F00F0D40A /* CSMigrationResult.swift */; };
 		B53FBA001CAB2D2F00F0D40A /* CSMigrationResult.swift in Sources */ = {isa = PBXBuildFile; fileRef = B53FB9FD1CAB2D2F00F0D40A /* CSMigrationResult.swift */; };
 		B53FBA011CAB2D2F00F0D40A /* CSMigrationResult.swift in Sources */ = {isa = PBXBuildFile; fileRef = B53FB9FD1CAB2D2F00F0D40A /* CSMigrationResult.swift */; };
@@ -445,6 +449,18 @@
 		B580857A1CDF808C004C2EEB /* SetupTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = B58085741CDF7F00004C2EEB /* SetupTests.swift */; };
 		B580857B1CDF808D004C2EEB /* SetupTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = B58085741CDF7F00004C2EEB /* SetupTests.swift */; };
 		B580857C1CDF808F004C2EEB /* SetupTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = B58085741CDF7F00004C2EEB /* SetupTests.swift */; };
+		B5831B701F34AC3400A9F647 /* AttributeProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = B5831B6F1F34AC3400A9F647 /* AttributeProtocol.swift */; };
+		B5831B711F34AC3400A9F647 /* AttributeProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = B5831B6F1F34AC3400A9F647 /* AttributeProtocol.swift */; };
+		B5831B721F34AC3400A9F647 /* AttributeProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = B5831B6F1F34AC3400A9F647 /* AttributeProtocol.swift */; };
+		B5831B731F34AC3400A9F647 /* AttributeProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = B5831B6F1F34AC3400A9F647 /* AttributeProtocol.swift */; };
+		B5831B751F34AC7A00A9F647 /* RelationshipProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = B5831B741F34AC7A00A9F647 /* RelationshipProtocol.swift */; };
+		B5831B761F34AC7A00A9F647 /* RelationshipProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = B5831B741F34AC7A00A9F647 /* RelationshipProtocol.swift */; };
+		B5831B771F34AC7A00A9F647 /* RelationshipProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = B5831B741F34AC7A00A9F647 /* RelationshipProtocol.swift */; };
+		B5831B781F34AC7A00A9F647 /* RelationshipProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = B5831B741F34AC7A00A9F647 /* RelationshipProtocol.swift */; };
+		B5831B7A1F34ACBA00A9F647 /* Transformable.swift in Sources */ = {isa = PBXBuildFile; fileRef = B5831B791F34ACBA00A9F647 /* Transformable.swift */; };
+		B5831B7B1F34ACBA00A9F647 /* Transformable.swift in Sources */ = {isa = PBXBuildFile; fileRef = B5831B791F34ACBA00A9F647 /* Transformable.swift */; };
+		B5831B7C1F34ACBA00A9F647 /* Transformable.swift in Sources */ = {isa = PBXBuildFile; fileRef = B5831B791F34ACBA00A9F647 /* Transformable.swift */; };
+		B5831B7D1F34ACBA00A9F647 /* Transformable.swift in Sources */ = {isa = PBXBuildFile; fileRef = B5831B791F34ACBA00A9F647 /* Transformable.swift */; };
 		B58B22F51C93C1BA00521925 /* CoreStore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 2F03A53019C5C6DA005002A5 /* CoreStore.framework */; };
 		B58D0C631EAA0C7E003EDD87 /* NSManagedObject+DynamicModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = B58D0C621EAA0C7E003EDD87 /* NSManagedObject+DynamicModel.swift */; };
 		B58D0C641EAA0C7E003EDD87 /* NSManagedObject+DynamicModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = B58D0C621EAA0C7E003EDD87 /* NSManagedObject+DynamicModel.swift */; };
@@ -757,6 +773,7 @@
 		B533C4DA1D7D4BFA001383CB /* DispatchQueue+CoreStore.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "DispatchQueue+CoreStore.swift"; sourceTree = "<group>"; };
 		B538BA701D15B3E30003A766 /* CoreStoreBridge.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CoreStoreBridge.m; sourceTree = "<group>"; };
 		B53B275E1EE3B92E00E9B352 /* CoreStoreManagedObject.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CoreStoreManagedObject.swift; sourceTree = "<group>"; };
+		B53CA9A11EF1EF1600E0F440 /* PartialObject.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = PartialObject.swift; sourceTree = "<group>"; };
 		B53FB9FD1CAB2D2F00F0D40A /* CSMigrationResult.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CSMigrationResult.swift; sourceTree = "<group>"; };
 		B53FBA031CAB300C00F0D40A /* CSMigrationType.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CSMigrationType.swift; sourceTree = "<group>"; };
 		B53FBA0A1CAB5E6500F0D40A /* CSCoreStore+Migrating.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "CSCoreStore+Migrating.swift"; sourceTree = "<group>"; };
@@ -811,6 +828,9 @@
 		B57D27BD1D0BBE8200539C58 /* BaseTestDataTestCase.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = BaseTestDataTestCase.swift; sourceTree = "<group>"; };
 		B57D27C11D0BC20100539C58 /* QueryTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = QueryTests.swift; sourceTree = "<group>"; };
 		B58085741CDF7F00004C2EEB /* SetupTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = SetupTests.swift; sourceTree = "<group>"; };
+		B5831B6F1F34AC3400A9F647 /* AttributeProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AttributeProtocol.swift; sourceTree = "<group>"; };
+		B5831B741F34AC7A00A9F647 /* RelationshipProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RelationshipProtocol.swift; sourceTree = "<group>"; };
+		B5831B791F34ACBA00A9F647 /* Transformable.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Transformable.swift; sourceTree = "<group>"; };
 		B58D0C621EAA0C7E003EDD87 /* NSManagedObject+DynamicModel.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "NSManagedObject+DynamicModel.swift"; sourceTree = "<group>"; };
 		B596BBAD1DD59FDB001DCDD9 /* ConvenienceTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ConvenienceTests.swift; sourceTree = "<group>"; };
 		B596BBB51DD5BC67001DCDD9 /* FetchableSource.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = FetchableSource.swift; sourceTree = "<group>"; };
@@ -828,6 +848,7 @@
 		B5C976E21C6C9F6A00B1AF90 /* UnsafeDataTransaction+Observing.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "UnsafeDataTransaction+Observing.swift"; sourceTree = "<group>"; };
 		B5C976E61C6E3A5900B1AF90 /* CoreStoreFetchedResultsController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CoreStoreFetchedResultsController.swift; sourceTree = "<group>"; };
 		B5D1E22B19FA9FBC003B2874 /* CoreStoreError.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CoreStoreError.swift; sourceTree = "<group>"; };
+		B5D2D5A91F7558CB00A4DE67 /* .cocoapods.yml */ = {isa = PBXFileReference; lastKnownFileType = text; path = .cocoapods.yml; sourceTree = SOURCE_ROOT; };
 		B5D339B31E925C2B00C880DE /* DynamicModelTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = DynamicModelTests.swift; sourceTree = "<group>"; };
 		B5D339D71E9489AB00C880DE /* CoreStoreObject.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CoreStoreObject.swift; sourceTree = "<group>"; };
 		B5D339DC1E9489C700C880DE /* DynamicObject.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = DynamicObject.swift; sourceTree = "<group>"; };
@@ -1024,6 +1045,7 @@
 				B5E84ED91AFF82360064E85B /* LICENSE */,
 				B5D9C8F61B160ED200E64F0E /* CoreStore.podspec */,
 				B5BDC91A1C202269008147CD /* Cartfile */,
+				B5D2D5A91F7558CB00A4DE67 /* .cocoapods.yml */,
 				B5BDC9271C2024F2008147CD /* .travis.yml */,
 				B5AD60CD1C90141E00F2B2E8 /* Package.swift */,
 			);
@@ -1229,17 +1251,27 @@
 			isa = PBXGroup;
 			children = (
 				B5D339D71E9489AB00C880DE /* CoreStoreObject.swift */,
+				B53CA9A11EF1EF1600E0F440 /* PartialObject.swift */,
+				B5831B6E1F3355C300A9F647 /* Properties */,
 				B52F74391E9B8724005F3DAC /* Dynamic Schema */,
 				B5D339DC1E9489C700C880DE /* DynamicObject.swift */,
 				B52F742E1E9B50D0005F3DAC /* SchemaHistory.swift */,
 				B5D339E61E9493A500C880DE /* Entity.swift */,
-				B5D33A001E96012400C880DE /* Relationship.swift */,
-				B5D339E11E948C3600C880DE /* Value.swift */,
 				B5A991EB1E9DC2CE0091A2E3 /* VersionLock.swift */,
 			);
 			name = "Dynamic Models";
 			sourceTree = "<group>";
 		};
+		B5831B6E1F3355C300A9F647 /* Properties */ = {
+			isa = PBXGroup;
+			children = (
+				B5D33A001E96012400C880DE /* Relationship.swift */,
+				B5D339E11E948C3600C880DE /* Value.swift */,
+				B5831B791F34ACBA00A9F647 /* Transformable.swift */,
+			);
+			name = Properties;
+			sourceTree = "<group>";
+		};
 		B5A5F26B1CAFF8D0004AB9AF /* Swift */ = {
 			isa = PBXGroup;
 			children = (
@@ -1428,6 +1460,8 @@
 		B5E84F291AFF849C0064E85B /* Internal */ = {
 			isa = PBXGroup;
 			children = (
+				B5831B6F1F34AC3400A9F647 /* AttributeProtocol.swift */,
+				B5831B741F34AC7A00A9F647 /* RelationshipProtocol.swift */,
 				B5C976E61C6E3A5900B1AF90 /* CoreStoreFetchedResultsController.swift */,
 				B526613F1CADD585007B85D9 /* CoreStoreFetchRequest+CoreStore.swift */,
 				B53B275E1EE3B92E00E9B352 /* CoreStoreManagedObject.swift */,
@@ -1808,6 +1842,7 @@
 				B5ECDC1D1CA81A2100C7F112 /* CSDataStack+Querying.swift in Sources */,
 				B5C976E31C6C9F6A00B1AF90 /* UnsafeDataTransaction+Observing.swift in Sources */,
 				B53FBA121CAB63CB00F0D40A /* Progress+ObjectiveC.swift in Sources */,
+				B5831B751F34AC7A00A9F647 /* RelationshipProtocol.swift in Sources */,
 				B5E1B5A81CAA49E2007FD580 /* CSDataStack+Migrating.swift in Sources */,
 				B5D339F11E94AF5800C880DE /* CoreStoreStrings.swift in Sources */,
 				B56007161B4018AB00A9A8F9 /* MigrationChain.swift in Sources */,
@@ -1826,6 +1861,7 @@
 				B5FAD6AE1B518DCB00714891 /* CoreStore+Migration.swift in Sources */,
 				B5E84EE71AFF84610064E85B /* CoreStore+Logging.swift in Sources */,
 				B546F9731C9C553300D5AC55 /* SetupResult.swift in Sources */,
+				B53CA9A21EF1EF1600E0F440 /* PartialObject.swift in Sources */,
 				B56007111B3F6BD500A9A8F9 /* Into.swift in Sources */,
 				B5E84F111AFF847B0064E85B /* Select.swift in Sources */,
 				B51260931E9B28F100402229 /* EntityIdentifier.swift in Sources */,
@@ -1899,6 +1935,7 @@
 				B59FA0AE1CCBAC95007C9BCA /* ICloudStore.swift in Sources */,
 				B5E84EF81AFF846E0064E85B /* CoreStore+Transaction.swift in Sources */,
 				B5E84F301AFF849C0064E85B /* NSManagedObjectContext+CoreStore.swift in Sources */,
+				B5831B7A1F34ACBA00A9F647 /* Transformable.swift in Sources */,
 				B546F9691C9AF26D00D5AC55 /* CSInMemoryStore.swift in Sources */,
 				B53FBA1E1CAB63FA00F0D40A /* NSFetchedResultsController+ObjectiveC.swift in Sources */,
 				B549F65E1E569C7400FBAB2D /* QueryableAttributeType.swift in Sources */,
@@ -1914,6 +1951,7 @@
 				B5E84EE61AFF84610064E85B /* DefaultLogger.swift in Sources */,
 				B53FBA041CAB300C00F0D40A /* CSMigrationType.swift in Sources */,
 				B5E84EF41AFF846E0064E85B /* AsynchronousDataTransaction.swift in Sources */,
+				B5831B701F34AC3400A9F647 /* AttributeProtocol.swift in Sources */,
 				B5DBE2CD1C9914A900B5CEFA /* CSCoreStore.swift in Sources */,
 				B546F95D1C9A12B800D5AC55 /* CSSQliteStore.swift in Sources */,
 				B5D339E71E9493A500C880DE /* Entity.swift in Sources */,
@@ -1993,6 +2031,7 @@
 				B5ECDC1F1CA81A2100C7F112 /* CSDataStack+Querying.swift in Sources */,
 				B5C976E41C6C9F9A00B1AF90 /* UnsafeDataTransaction+Observing.swift in Sources */,
 				B53FBA141CAB63CB00F0D40A /* Progress+ObjectiveC.swift in Sources */,
+				B5831B761F34AC7A00A9F647 /* RelationshipProtocol.swift in Sources */,
 				B5E1B5AA1CAA49E2007FD580 /* CSDataStack+Migrating.swift in Sources */,
 				B5D339F21E94AF5800C880DE /* CoreStoreStrings.swift in Sources */,
 				B5D3F6461C887C0A00C7492A /* LegacySQLiteStore.swift in Sources */,
@@ -2011,6 +2050,7 @@
 				82BA18A31C4BBD2200A0916E /* DataStack.swift in Sources */,
 				82BA18C81C4BBD5900A0916E /* MigrationChain.swift in Sources */,
 				B546F9741C9C553300D5AC55 /* SetupResult.swift in Sources */,
+				B53CA9A31EF1EF1600E0F440 /* PartialObject.swift in Sources */,
 				82BA18B11C4BBD3100A0916E /* SaveResult.swift in Sources */,
 				82BA18DD1C4BBE1400A0916E /* NSFetchedResultsController+Convenience.swift in Sources */,
 				B51260941E9B28F100402229 /* EntityIdentifier.swift in Sources */,
@@ -2084,6 +2124,7 @@
 				82BA18D31C4BBD7100A0916E /* NSManagedObjectContext+CoreStore.swift in Sources */,
 				82BA18AD1C4BBD3100A0916E /* UnsafeDataTransaction.swift in Sources */,
 				B546F96A1C9AF26D00D5AC55 /* CSInMemoryStore.swift in Sources */,
+				B5831B7B1F34ACBA00A9F647 /* Transformable.swift in Sources */,
 				B53FBA201CAB63FA00F0D40A /* NSFetchedResultsController+ObjectiveC.swift in Sources */,
 				82BA18A81C4BBD2900A0916E /* CoreStoreLogger.swift in Sources */,
 				B549F65F1E569C7400FBAB2D /* QueryableAttributeType.swift in Sources */,
@@ -2099,6 +2140,7 @@
 				B53FBA061CAB300C00F0D40A /* CSMigrationType.swift in Sources */,
 				82BA18BE1C4BBD4A00A0916E /* Tweak.swift in Sources */,
 				B5DBE2CE1C9914A900B5CEFA /* CSCoreStore.swift in Sources */,
+				B5831B711F34AC3400A9F647 /* AttributeProtocol.swift in Sources */,
 				B546F95E1C9A12B800D5AC55 /* CSSQliteStore.swift in Sources */,
 				B5ECDC0D1CA8161B00C7F112 /* CSGroupBy.swift in Sources */,
 				B5D339E81E9493A500C880DE /* Entity.swift in Sources */,
@@ -2178,6 +2220,7 @@
 				B5D3F6481C887C0A00C7492A /* LegacySQLiteStore.swift in Sources */,
 				B5220E1C1D130801009BC71E /* FetchedResultsControllerDelegate.swift in Sources */,
 				B52DD19E1BE1F92C00949AFE /* AsynchronousDataTransaction.swift in Sources */,
+				B5831B781F34AC7A00A9F647 /* RelationshipProtocol.swift in Sources */,
 				B52DD1981BE1F92500949AFE /* CoreStore+Setup.swift in Sources */,
 				B5D339F41E94AF5800C880DE /* CoreStoreStrings.swift in Sources */,
 				B5220E241D13085E009BC71E /* NSFetchedResultsController+Convenience.swift in Sources */,
@@ -2196,6 +2239,7 @@
 				B52DD1961BE1F92500949AFE /* DataStack.swift in Sources */,
 				B5ECDBFD1CA804FD00C7F112 /* NSManagedObjectContext+ObjectiveC.swift in Sources */,
 				B52DD1BD1BE1F94300949AFE /* NSManagedObject+Convenience.swift in Sources */,
+				B53CA9A51EF1EF1600E0F440 /* PartialObject.swift in Sources */,
 				B52DD1AD1BE1F93900949AFE /* Where.swift in Sources */,
 				B53FBA1C1CAB63E200F0D40A /* NSManagedObject+ObjectiveC.swift in Sources */,
 				B51260961E9B28F100402229 /* EntityIdentifier.swift in Sources */,
@@ -2269,6 +2313,7 @@
 				B52DD1A01BE1F92C00949AFE /* UnsafeDataTransaction.swift in Sources */,
 				B5ECDC331CA81CDC00C7F112 /* CSCoreStore+Transaction.swift in Sources */,
 				B52DD1BB1BE1F94000949AFE /* MigrationType.swift in Sources */,
+				B5831B7D1F34ACBA00A9F647 /* Transformable.swift in Sources */,
 				B52DD1C91BE1F94600949AFE /* NSManagedObjectContext+Transaction.swift in Sources */,
 				B5220E151D130663009BC71E /* CoreStore+Observing.swift in Sources */,
 				B549F6611E569C7400FBAB2D /* QueryableAttributeType.swift in Sources */,
@@ -2284,6 +2329,7 @@
 				B52DD1B91BE1F94000949AFE /* CoreStore+Migration.swift in Sources */,
 				B5519A5C1CA2008C002BEF78 /* CSBaseDataTransaction.swift in Sources */,
 				B5DBE2D51C991B3E00B5CEFA /* CSDataStack.swift in Sources */,
+				B5831B731F34AC3400A9F647 /* AttributeProtocol.swift in Sources */,
 				B5AEFAB81C9962AE00AD137F /* CoreStoreBridge.swift in Sources */,
 				B598514B1C90289F00C99590 /* NSPersistentStoreCoordinator+Setup.swift in Sources */,
 				B5D339EA1E9493A500C880DE /* Entity.swift in Sources */,
@@ -2363,6 +2409,7 @@
 				B5C976E51C6C9F9B00B1AF90 /* UnsafeDataTransaction+Observing.swift in Sources */,
 				B53FBA151CAB63CB00F0D40A /* Progress+ObjectiveC.swift in Sources */,
 				B5E1B5AB1CAA49E2007FD580 /* CSDataStack+Migrating.swift in Sources */,
+				B5831B771F34AC7A00A9F647 /* RelationshipProtocol.swift in Sources */,
 				B5D3F6471C887C0A00C7492A /* LegacySQLiteStore.swift in Sources */,
 				B5D339F31E94AF5800C880DE /* CoreStoreStrings.swift in Sources */,
 				B5E1B5A01CAA2568007FD580 /* CSDataStack+Observing.swift in Sources */,
@@ -2381,6 +2428,7 @@
 				B56321A81BD65219006C9394 /* NSManagedObject+Convenience.swift in Sources */,
 				B546F9751C9C553300D5AC55 /* SetupResult.swift in Sources */,
 				B56321981BD65216006C9394 /* Where.swift in Sources */,
+				B53CA9A41EF1EF1600E0F440 /* PartialObject.swift in Sources */,
 				B5202CFD1C046E8400DED140 /* NSFetchedResultsController+Convenience.swift in Sources */,
 				B5FE4DA91C84FB4400FA6A91 /* InMemoryStore.swift in Sources */,
 				B51260951E9B28F100402229 /* EntityIdentifier.swift in Sources */,
@@ -2454,6 +2502,7 @@
 				B56321B11BD6521C006C9394 /* NSManagedObjectContext+CoreStore.swift in Sources */,
 				B563218D1BD65216006C9394 /* CoreStore+Transaction.swift in Sources */,
 				B546F96B1C9AF26D00D5AC55 /* CSInMemoryStore.swift in Sources */,
+				B5831B7C1F34ACBA00A9F647 /* Transformable.swift in Sources */,
 				B53FBA211CAB63FA00F0D40A /* NSFetchedResultsController+ObjectiveC.swift in Sources */,
 				B563218B1BD65216006C9394 /* UnsafeDataTransaction.swift in Sources */,
 				B549F6601E569C7400FBAB2D /* QueryableAttributeType.swift in Sources */,
@@ -2469,6 +2518,7 @@
 				B53FBA071CAB300C00F0D40A /* CSMigrationType.swift in Sources */,
 				B56321841BD65216006C9394 /* DefaultLogger.swift in Sources */,
 				B5DBE2CF1C9914A900B5CEFA /* CSCoreStore.swift in Sources */,
+				B5831B721F34AC3400A9F647 /* AttributeProtocol.swift in Sources */,
 				B546F95F1C9A12B800D5AC55 /* CSSQliteStore.swift in Sources */,
 				B5ECDC0E1CA8161B00C7F112 /* CSGroupBy.swift in Sources */,
 				B5D339E91E9493A500C880DE /* Entity.swift in Sources */,
--- a/CoreStoreDemo/CoreStoreDemo/Base.lproj/Main.storyboard
+++ b/CoreStoreDemo/CoreStoreDemo/Base.lproj/Main.storyboard
@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12113" systemVersion="16C67" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="Ni8-QF-XHB">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12121" systemVersion="16G29" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="Ni8-QF-XHB">
    <device id="retina4_7" orientation="portrait">
        <adaptation id="fullscreen"/>
    </device>
    <dependencies>
        <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12078"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12089"/>
        <capability name="Aspect ratio constraints" minToolsVersion="5.1"/>
        <capability name="Constraints to layout margins" minToolsVersion="6.0"/>
        <capability name="Constraints with non-1.0 multipliers" minToolsVersion="5.1"/>
@@ -459,8 +459,8 @@
                        <rect key="frame" x="0.0" y="0.0" width="375" height="301.5"/>
                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                        <subviews>
-                            <view contentMode="scaleToFill" verticalCompressionResistancePriority="250" misplaced="YES" translatesAutoresizingMaskIntoConstraints="NO" id="NhC-oM-bkd">
-                                <rect key="frame" x="20" y="69.5" width="552" height="36.5"/>
+                            <view contentMode="scaleToFill" verticalCompressionResistancePriority="250" translatesAutoresizingMaskIntoConstraints="NO" id="NhC-oM-bkd">
+                                <rect key="frame" x="16" y="89.5" width="343" height="50"/>
                                <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                <constraints>
                                    <constraint firstAttribute="height" relation="greaterThanOrEqual" id="TIX-qi-B34"/>
@@ -511,8 +511,8 @@
                                    <action selector="brightnessSliderValueDidChange:" destination="dX3-kR-CYC" eventType="valueChanged" id="F09-EP-2iD"/>
                                </connections>
                            </slider>
-                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" misplaced="YES" text="Label" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="p4O-tf-dgt">
-                                <rect key="frame" x="20" y="49" width="552" height="20.5"/>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Label" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="p4O-tf-dgt">
+                                <rect key="frame" x="16" y="69" width="343" height="20.5"/>
                                <fontDescription key="fontDescription" type="boldSystem" pointSize="17"/>
                                <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                <nil key="highlightedColor"/>
@@ -797,8 +797,8 @@
                        <rect key="frame" x="0.0" y="64" width="375" height="603"/>
                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                        <subviews>
-                            <mapView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" ambiguous="YES" mapType="standard" translatesAutoresizingMaskIntoConstraints="NO" id="V2U-0R-Ts0">
-                                <rect key="frame" x="0.0" y="0.0" width="375" height="536"/>
+                            <mapView verifyAmbiguity="ignoreSizes" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" ambiguous="YES" mapType="standard" translatesAutoresizingMaskIntoConstraints="NO" id="V2U-0R-Ts0">
+                                <rect key="frame" x="0.0" y="0.0" width="375" height="558"/>
                                <connections>
                                    <outlet property="delegate" destination="jPl-fH-NlD" id="Sjn-YC-haS"/>
                                </connections>
@@ -806,7 +806,7 @@
                        </subviews>
                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                        <constraints>
-                            <constraint firstItem="RZg-hi-T8O" firstAttribute="top" secondItem="V2U-0R-Ts0" secondAttribute="bottom" id="GcS-Jz-Wcm"/>
+                            <constraint firstItem="RZg-hi-T8O" firstAttribute="top" secondItem="V2U-0R-Ts0" secondAttribute="bottom" id="N9r-9J-68d"/>
                            <constraint firstItem="V2U-0R-Ts0" firstAttribute="top" secondItem="k4s-iL-Krh" secondAttribute="top" id="S5Z-Da-V6J"/>
                            <constraint firstAttribute="trailing" secondItem="V2U-0R-Ts0" secondAttribute="trailing" id="YPc-RK-5ib"/>
                            <constraint firstItem="V2U-0R-Ts0" firstAttribute="leading" secondItem="k4s-iL-Krh" secondAttribute="leading" id="hk5-Rz-FyU"/>
@@ -820,7 +820,7 @@
                </viewController>
                <placeholder placeholderIdentifier="IBFirstResponder" id="YnG-TD-zxQ" userLabel="First Responder" sceneMemberID="firstResponder"/>
            </objects>
-            <point key="canvasLocation" x="3694" y="2020"/>
+            <point key="canvasLocation" x="3693.5" y="2019.5"/>
        </scene>
        <!--Logger-->
        <scene sceneID="n7W-0g-bbY">
@@ -927,7 +927,7 @@
                                    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                                    <subviews>
                                        <segmentedControl opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="top" segmentControlStyle="bordered" selectedSegmentIndex="0" translatesAutoresizingMaskIntoConstraints="NO" id="YVj-dA-fyV">
-                                            <rect key="frame" x="20" y="26" width="560" height="29"/>
+                                            <rect key="frame" x="20" y="26" width="335" height="29"/>
                                            <segments>
                                                <segment title="Fetch"/>
                                                <segment title="Query"/>
--- a/CoreStoreDemo/CoreStoreDemo/List
+++ b/CoreStoreDemo/CoreStoreDemo/List
@@ -16,25 +16,25 @@ import CoreStore

 final class Palette: CoreStoreObject {
    
-    let hue = Value.Required<Int>("hue")
-    let saturation = Value.Required<Float>("saturation")
-    let brightness = Value.Required<Float>("brightness")
+    let hue = Value.Required<Int>("hue", initial: 0)
+    let saturation = Value.Required<Float>("saturation", initial: 0)
+    let brightness = Value.Required<Float>("brightness", initial: 0)
    
    let colorName = Value.Optional<String>(
        "colorName",
        isTransient: true,
-        customGetter: Palette.getCachedColorName
+        customGetter: Palette.getColorName
    )
    
-    private static func getCachedColorName(_ instance: Palette, _ getValue: () -> String?) -> String? {
+    private static func getColorName(_ partialObject: PartialObject<Palette>) -> String? {
        
-        if let colorName = getValue() {
+        if let colorName = partialObject.primitiveValue(for: { $0.colorName }) {
            
            return colorName
        }
        
        let colorName: String
-        switch instance.hue.value % 360 {
+        switch partialObject.value(for: { $0.hue }) % 360 {
            
        case 0 ..< 20: colorName = "Lower Reds"
        case 20 ..< 57: colorName = "Oranges and Browns"
@@ -47,7 +47,7 @@ final class Palette: CoreStoreObject {
        default: colorName = "Upper Reds"
        }
        
-        instance.colorName.primitiveValue = colorName
+        partialObject.setPrimitiveValue(colorName, for: { $0.colorName })
        return colorName
    }
 }
--- a/CoreStoreTests/DynamicModelTests.swift
+++ b/CoreStoreTests/DynamicModelTests.swift
@@ -37,7 +37,7 @@ import CoreStore

 class Animal: CoreStoreObject {
    
-    let species = Value.Required<String>("species", default: "Swift")
+    let species = Value.Required<String>("species", initial: "Swift")
    let master = Relationship.ToOne<Person>("master")
    let color = Transformable.Optional<Color>("color")
 }
@@ -45,46 +45,57 @@ class Animal: CoreStoreObject {
 class Dog: Animal {
    
    let nickname = Value.Optional<String>("nickname")
-    let age = Value.Required<Int>("age", default: 1)
+    let age = Value.Required<Int>("age", initial: 1)
    let friends = Relationship.ToManyOrdered<Dog>("friends")
    let friendedBy = Relationship.ToManyUnordered<Dog>("friendedBy", inverse: { $0.friends })
 }

 class Person: CoreStoreObject {
+    
    let title = Value.Required<String>(
        "title",
-        default: "Mr.",
-        customSetter: { (`self`, setValue, originalNewValue) in
-            
-            setValue(originalNewValue)
-            self.displayName .= nil
-        }
+        initial: "Mr.",
+        customSetter: Person.setTitle
    )
+    
    let name = Value.Required<String>(
        "name",
-        customSetter: { (`self`, setValue, originalNewValue) in
-            
-            setValue(originalNewValue)
-            self.displayName .= nil
-        }
+        initial: "",
+        customSetter: Person.setName
    )
+    
    let displayName = Value.Optional<String>(
        "displayName",
        isTransient: true,
-        customGetter: Person.cachedDisplayName(_:_:),
+        customGetter: Person.getDisplayName(_:),
        affectedByKeyPaths: Person.keyPathsAffectingDisplayName()
    )
+    
    let pets = Relationship.ToManyUnordered<Animal>("pets", inverse: { $0.master })
    
-    static func cachedDisplayName(_ instance: Person, _ getValue: () -> String?) -> String? {
+    private static func setTitle(_ partialObject: PartialObject<Person>, _ newValue: String) {
        
-        if let cached = getValue() {
+        partialObject.setPrimitiveValue(newValue, for: { $0.title })
+        partialObject.setPrimitiveValue(nil, for: { $0.displayName })
+    }
+    
+    private static func setName(_ partialObject: PartialObject<Person>, _ newValue: String) {
+        
+        partialObject.setPrimitiveValue(newValue, for: { $0.name })
+        partialObject.setPrimitiveValue(nil, for: { $0.displayName })
+    }
+    
+    static func getDisplayName(_ partialObject: PartialObject<Person>) -> String? {
+        
+        if let displayName = partialObject.primitiveValue(for: { $0.displayName }) {
            
-            return cached
+            return displayName
        }
-        let primitiveValue = "\(instance.title.value) \(instance.name.value)"
-        instance.displayName .= primitiveValue
-        return primitiveValue
+        let title = partialObject.value(for: { $0.title })
+        let name = partialObject.value(for: { $0.name })
+        let displayName = "\(title) \(name)"
+        partialObject.setPrimitiveValue(displayName, for: { $0.displayName })
+        return displayName
    }
    
    static func keyPathsAffectingDisplayName() -> Set<String> {
--- a/CoreStoreTests/WhereTests.swift
+++ b/CoreStoreTests/WhereTests.swift
@@ -256,6 +256,21 @@ final class WhereTests: XCTestCase {
            XCTAssertEqual(andWhere.predicate, andPredicate)
            XCTAssertEqual(andWhere, whereClause1 && whereClause2 && whereClause3)
        }
+        do {
+            
+            let andWhere = whereClause1 && whereClause2 && whereClause3
+            let noneWhere: Where? = nil
+            let someWhere: Where? = Where("key4", isEqualTo: "value4")
+
+            
+            let finalNoneWhere = andWhere && noneWhere
+            let finalSomeWhere = andWhere && someWhere
+            let unwrappedFinalSomeWhere = andWhere && someWhere!
+
+        
+            XCTAssertEqual(andWhere.predicate, finalNoneWhere.predicate)
+            XCTAssertEqual(finalSomeWhere.predicate, unwrappedFinalSomeWhere.predicate)
+        }
        do {
            
            let orWhere = whereClause1 || whereClause2 || whereClause3
@@ -272,6 +287,21 @@ final class WhereTests: XCTestCase {
            XCTAssertEqual(orWhere.predicate, orPredicate)
            XCTAssertEqual(orWhere, whereClause1 || whereClause2 || whereClause3)
        }
+        do {
+            
+            let orWhere = whereClause1 || whereClause2 || whereClause3
+            let noneWhere: Where? = nil
+            let someWhere: Where? = Where("key4", isEqualTo: "value4")
+            
+            
+            let finalNoneWhere = orWhere && noneWhere
+            let finalSomeWhere = orWhere && someWhere
+            let unwrappedFinalSomeWhere = orWhere && someWhere!
+            
+            XCTAssertEqual(orWhere.predicate, finalNoneWhere.predicate)
+            XCTAssertEqual(finalSomeWhere.predicate, unwrappedFinalSomeWhere.predicate)
+        }
+
    }
    
    @objc
--- a/README.md
+++ b/README.md
@@ -1722,7 +1722,7 @@ These special properties' values can be accessed or mutated using `.value`:
 ```swift
 CoreStore.perform(
    asynchronous: { (transaction) in
-        let dog: Dog = CoreStore.fetchOne(From<Dog>())!
+        let dog: Dog = transaction.fetchOne(From<Dog>())!
        // ...
        let nickname = dog.nickname.value // String?
        let species = dog.species.value // String
--- a/Sources/AsynchronousDataTransaction.swift
+++ b/Sources/AsynchronousDataTransaction.swift
@@ -210,6 +210,7 @@ public final class AsynchronousDataTransaction: BaseDataTransaction {
            group.leave()
        }
        group.wait()
+        self.context.reset()
    }
    
    
--- a/Sources/AttributeProtocol.swift
+++ b/Sources/AttributeProtocol.swift
@@ -0,0 +1,47 @@
+//
+//  AttributeProtocol.swift
+//  CoreStore
+//
+//  Copyright © 2017 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import Foundation
+import CoreData
+
+
+// MARK: - AttributeProtocol
+
+internal protocol AttributeProtocol: class {
+    
+    static var attributeType: NSAttributeType { get }
+    
+    var keyPath: KeyPath { get }
+    var isOptional: Bool { get }
+    var isIndexed: Bool { get }
+    var isTransient: Bool { get }
+    var versionHashModifier: () -> String? { get }
+    var renamingIdentifier: () -> String? { get }
+    var defaultValue: () -> Any? { get }
+    var affectedByKeyPaths: () -> Set<String> { get }
+    weak var parentObject: CoreStoreObject? { get set }
+    var getter: CoreStoreManagedObject.CustomGetter? { get }
+    var setter: CoreStoreManagedObject.CustomSetter? { get }
+}
--- a/Sources/BaseDataTransaction.swift
+++ b/Sources/BaseDataTransaction.swift
@@ -438,6 +438,11 @@ public /*abstract*/ class BaseDataTransaction {
        return self.bypassesQueueing || self.transactionQueue.cs_isCurrentExecutionContext()
    }
    
+    deinit {
+        
+        self.context.reset()
+    }
+    
    
    // MARK: Deprecated
    
--- a/Sources/CoreStore+CustomDebugStringConvertible.swift
+++ b/Sources/CoreStore+CustomDebugStringConvertible.swift
@@ -868,7 +868,8 @@ extension SQLiteStore: CustomDebugStringConvertible, CoreStoreDebugStringConvert
            ("storeOptions", self.storeOptions as Any),
            ("fileURL", self.fileURL),
            ("migrationMappingProviders", self.migrationMappingProviders),
-            ("localStorageOptions", self.localStorageOptions)
+            ("localStorageOptions", self.localStorageOptions),
+            ("fileSize", self.fileSize() as Any)
        )
    }
 }
--- a/Sources/CoreStore+Transaction.swift
+++ b/Sources/CoreStore+Transaction.swift
@@ -54,7 +54,7 @@ public extension CoreStore {
    }
    
    /**
-     Using the `defaultStack`, performs a transaction synchronously where `NSManagedObject` or `CoreStoreObject` creates, updates, and deletes can be made. The changes are commited automatically after the `task` closure returns. On success, the value returned from closure will be the return value of `perform(synchronous:)`. Any errors thrown from inside the `task` will be rethrown from `perform(synchronous:)`. To cancel/rollback changes, call `try transaction.cancel()`, which throws a `CoreStoreError.userCancelled`.
+     Using the `defaultStack`, performs a transaction synchronously where `NSManagedObject` or `CoreStoreObject` creates, updates, and deletes can be made. The changes are commited automatically after the `task` closure returns. On success, the value returned from closure will be the return value of `perform(synchronous:)`. Any errors thrown from inside the `task` will be thrown from `perform(synchronous:)`. To cancel/rollback changes, call `try transaction.cancel()`, which throws a `CoreStoreError.userCancelled`.
     
     - parameter task: the synchronous non-escaping closure where creates, updates, and deletes can be made to the transaction. Transaction blocks are executed serially in a background queue, and all changes are made from a concurrent `NSManagedObjectContext`.
     - parameter waitForAllObservers: When `true`, this method waits for all observers to be notified of the changes before returning. This results in more predictable data update order, but may risk triggering deadlocks. When `false`, this method does not wait for observers to be notified of the changes before returning. This results in lower risk for deadlocks, but the updated data may not have been propagated to the `DataStack` after returning. Defaults to `true`.
--- a/Sources/CoreStoreBridge.m
+++ b/Sources/CoreStoreBridge.m
@@ -235,15 +235,16 @@ CSWhere *_Nonnull CSWherePredicate(NSPredicate *_Nonnull predicate) CORESTORE_RE

 - (void)setAffectedStores:(NSArray<NSPersistentStore *> *_Nullable)affectedStores {
    
-    // Bugfix for NSFetchRequest messing up memory management for `affectedStores`
-    // http://stackoverflow.com/questions/14396375/nsfetchedresultscontroller-crashes-in-ios-6-if-affectedstores-is-specified
-    
-    if (NSFoundationVersionNumber < NSFoundationVersionNumber10_0) {
+    NSProcessInfo *processInfo = [NSProcessInfo processInfo];
+    if ([processInfo isOperatingSystemAtLeastVersion:(NSOperatingSystemVersion){ 11, 0, 0 }]
+        || ![processInfo isOperatingSystemAtLeastVersion:(NSOperatingSystemVersion){ 10, 0, 0 }]) {
        
        self.safeAffectedStores = affectedStores;
        [super setAffectedStores:affectedStores];
        return;
    }
+    // Bugfix for NSFetchRequest messing up memory management for `affectedStores`
+    // http://stackoverflow.com/questions/14396375/nsfetchedresultscontroller-crashes-in-ios-6-if-affectedstores-is-specified
    if (self.releaseArray != NULL) {
        
        CFRelease(self.releaseArray);
--- a/Sources/CoreStoreObject.swift
+++ b/Sources/CoreStoreObject.swift
@@ -135,3 +135,23 @@ open /*abstract*/ class CoreStoreObject: DynamicObject, Hashable {
        }
    }
 }
+
+
+// MARK: - DynamicObject where Self: CoreStoreObject
+
+public extension DynamicObject where Self: CoreStoreObject {
+    
+    public func partialObject() -> PartialObject<Self> {
+        
+        CoreStore.assert(
+            !self.isMeta,
+            "Attempted to create a \(cs_typeName(PartialObject<Self>.self)) from a meta object. Meta objects are only used for querying keyPaths and infering types."
+        )
+        return PartialObject<Self>(self.rawObject!)
+    }
+    
+    internal static var meta: Self {
+        
+        return self.init(asMeta: ())
+    }
+}
--- a/Sources/CoreStoreSchema.swift
+++ b/Sources/CoreStoreSchema.swift
@@ -295,8 +295,8 @@ public final class CoreStoreSchema: DynamicSchema {
                    description.isIndexed = attribute.isIndexed
                    description.defaultValue = attribute.defaultValue()
                    description.isTransient = attribute.isTransient
-                    description.versionHashModifier = attribute.versionHashModifier
-                    description.renamingIdentifier = attribute.renamingIdentifier
+                    description.versionHashModifier = attribute.versionHashModifier()
+                    description.renamingIdentifier = attribute.renamingIdentifier()
                    propertyDescriptions.append(description)
                    keyPathsByAffectedKeyPaths[attribute.keyPath] = attribute.affectedByKeyPaths()
                    customGetterSetterByKeyPaths[attribute.keyPath] = (attribute.getter, attribute.setter)
@@ -308,8 +308,8 @@ public final class CoreStoreSchema: DynamicSchema {
                    description.maxCount = relationship.maxCount
                    description.isOrdered = relationship.isOrdered
                    description.deleteRule = relationship.deleteRule
-                    description.versionHashModifier = relationship.versionHashModifier
-                    description.renamingIdentifier = relationship.renamingIdentifier
+                    description.versionHashModifier = relationship.versionHashModifier()
+                    description.renamingIdentifier = relationship.renamingIdentifier()
                    propertyDescriptions.append(description)
                    keyPathsByAffectedKeyPaths[relationship.keyPath] = relationship.affectedByKeyPaths()
                    
--- a/Sources/DataStack+Migration.swift
+++ b/Sources/DataStack+Migration.swift
@@ -707,6 +707,7 @@ public extension DataStack {
        
        do {
            
+            try storage.cs_finalizeStorageAndWait(soureModelHint: sourceModel)
            try migrationManager.migrateStore(
                from: fileURL,
                sourceType: type(of: storage).storeType,
@@ -716,6 +717,13 @@ public extension DataStack {
                destinationType: type(of: storage).storeType,
                destinationOptions: nil
            )
+            let temporaryStorage = SQLiteStore(
+                fileURL: temporaryFileURL,
+                configuration: storage.configuration,
+                migrationMappingProviders: storage.migrationMappingProviders,
+                localStorageOptions: storage.localStorageOptions
+            )
+            try temporaryStorage.cs_finalizeStorageAndWait(soureModelHint: destinationModel)
        }
        catch {
            
--- a/Sources/DataStack+Transaction.swift
+++ b/Sources/DataStack+Transaction.swift
@@ -95,7 +95,7 @@ public extension DataStack {
    }
    
    /**
-     Performs a transaction synchronously where `NSManagedObject` or `CoreStoreObject` creates, updates, and deletes can be made. The changes are commited automatically after the `task` closure returns. On success, the value returned from closure will be the return value of `perform(synchronous:)`. Any errors thrown from inside the `task` will be rethrown from `perform(synchronous:)`. To cancel/rollback changes, call `try transaction.cancel()`, which throws a `CoreStoreError.userCancelled`.
+     Performs a transaction synchronously where `NSManagedObject` or `CoreStoreObject` creates, updates, and deletes can be made. The changes are commited automatically after the `task` closure returns. On success, the value returned from closure will be the return value of `perform(synchronous:)`. Any errors thrown from inside the `task` will be thrown from `perform(synchronous:)`. To cancel/rollback changes, call `try transaction.cancel()`, which throws a `CoreStoreError.userCancelled`.
     
     - parameter task: the synchronous non-escaping closure where creates, updates, and deletes can be made to the transaction. Transaction blocks are executed serially in a background queue, and all changes are made from a concurrent `NSManagedObjectContext`.
     - parameter waitForAllObservers: When `true`, this method waits for all observers to be notified of the changes before returning. This results in more predictable data update order, but may risk triggering deadlocks. When `false`, this method does not wait for observers to be notified of the changes before returning. This results in lower risk for deadlocks, but the updated data may not have been propagated to the `DataStack` after returning. Defaults to `true`.
--- a/Sources/DynamicObject.swift
+++ b/Sources/DynamicObject.swift
@@ -155,14 +155,3 @@ extension CoreStoreObject {
        return self.rawObject!
    }
 }
-
-
-// MARK: - Internal
-
-internal extension DynamicObject where Self: CoreStoreObject {
-    
-    internal static var meta: Self {
-        
-        return self.init(asMeta: ())
-    }
-}
--- a/Sources/DynamicSchema+Convenience.swift
+++ b/Sources/DynamicSchema+Convenience.swift
@@ -96,71 +96,62 @@ public extension DynamicSchema {
                        
                    case .integer16AttributeType:
                        valueType = Int16.self
-                        if let defaultValue = (attribute.defaultValue as! Int16.ImportableNativeType?).flatMap(Int16.cs_fromImportableNativeType),
-                            defaultValue != Int16.cs_emptyValue() {
+                        if let defaultValue = (attribute.defaultValue as! Int16.ImportableNativeType?).flatMap(Int16.cs_fromImportableNativeType) {
                            
-                            defaultString = ", default: \(defaultValue)"
+                            defaultString = ", initial: \(defaultValue)"
                        }
                    case .integer32AttributeType:
                        valueType = Int32.self
-                        if let defaultValue = (attribute.defaultValue as! Int32.ImportableNativeType?).flatMap(Int32.cs_fromImportableNativeType),
-                            defaultValue != Int32.cs_emptyValue() {
+                        if let defaultValue = (attribute.defaultValue as! Int32.ImportableNativeType?).flatMap(Int32.cs_fromImportableNativeType) {
                            
-                            defaultString = ", default: \(defaultValue)"
+                            defaultString = ", initial: \(defaultValue)"
                        }
                    case .integer64AttributeType:
                        valueType = Int64.self
-                        if let defaultValue = (attribute.defaultValue as! Int64.ImportableNativeType?).flatMap(Int64.cs_fromImportableNativeType),
-                            defaultValue != Int64.cs_emptyValue() {
+                        if let defaultValue = (attribute.defaultValue as! Int64.ImportableNativeType?).flatMap(Int64.cs_fromImportableNativeType) {
                            
-                            defaultString = ", default: \(defaultValue)"
+                            defaultString = ", initial: \(defaultValue)"
                        }
                    case .decimalAttributeType:
                        valueType = NSDecimalNumber.self
-                        if let defaultValue = (attribute.defaultValue as! NSDecimalNumber.ImportableNativeType?).flatMap(NSDecimalNumber.cs_fromImportableNativeType),
-                            defaultValue != NSDecimalNumber.cs_emptyValue() {
+                        if let defaultValue = (attribute.defaultValue as! NSDecimalNumber?) {
                            
-                            defaultString = ", default: NSDecimalNumber(string: \"\(defaultValue.description(withLocale: nil))\")"
+                            defaultString = ", initial: NSDecimalNumber(string: \"\(defaultValue.description(withLocale: nil))\")"
                        }
                    case .doubleAttributeType:
                        valueType = Double.self
-                        if let defaultValue = (attribute.defaultValue as! Double.ImportableNativeType?).flatMap(Double.cs_fromImportableNativeType),
-                            defaultValue != Double.cs_emptyValue() {
+                        if let defaultValue = (attribute.defaultValue as! Double.ImportableNativeType?).flatMap(Double.cs_fromImportableNativeType) {
                            
-                            defaultString = ", default: \(defaultValue)"
+                            defaultString = ", initial: \(defaultValue)"
                        }
                    case .floatAttributeType:
                        valueType = Float.self
-                        if let defaultValue = (attribute.defaultValue as! Float.ImportableNativeType?).flatMap(Float.cs_fromImportableNativeType),
-                            defaultValue != Float.cs_emptyValue() {
+                        if let defaultValue = (attribute.defaultValue as! Float.ImportableNativeType?).flatMap(Float.cs_fromImportableNativeType) {
                            
-                            defaultString = ", default: \(defaultValue)"
+                            defaultString = ", initial: \(defaultValue)"
                        }
                    case .stringAttributeType:
                        valueType = String.self
-                        if let defaultValue = (attribute.defaultValue as! String.ImportableNativeType?).flatMap(String.cs_fromImportableNativeType),
-                            defaultValue != String.cs_emptyValue() {
+                        if let defaultValue = (attribute.defaultValue as! String.ImportableNativeType?).flatMap(String.cs_fromImportableNativeType) {
                            
                            // TODO: escape strings
-                            defaultString = ", default: \"\(defaultValue)\""
+                            defaultString = ", initial: \"\(defaultValue)\""
                        }
                    case .booleanAttributeType:
                        valueType = Bool.self
-                        if let defaultValue = (attribute.defaultValue as! Bool.ImportableNativeType?).flatMap(Bool.cs_fromImportableNativeType),
-                            defaultValue != Bool.cs_emptyValue() {
+                        if let defaultValue = (attribute.defaultValue as! Bool.ImportableNativeType?).flatMap(Bool.cs_fromImportableNativeType) {
                            
-                            defaultString = ", default: \(defaultValue ? "true" : "false")"
+                            defaultString = ", initial: \(defaultValue ? "true" : "false")"
                        }
                    case .dateAttributeType:
                        valueType = Date.self
                        if let defaultValue = (attribute.defaultValue as! Date.ImportableNativeType?).flatMap(Date.cs_fromImportableNativeType) {
                            
-                            defaultString = ", default: Date(timeIntervalSinceReferenceDate: \(defaultValue.timeIntervalSinceReferenceDate))"
+                            defaultString = ", initial: Date(timeIntervalSinceReferenceDate: \(defaultValue.timeIntervalSinceReferenceDate))"
                        }
                    case .binaryDataAttributeType:
                        valueType = Data.self
-                        if let defaultValue = (attribute.defaultValue as! Data.ImportableNativeType?).flatMap(Data.cs_fromImportableNativeType),
-                            defaultValue != Data.cs_emptyValue() {
+                        if let defaultValue = (attribute.defaultValue as! Data.ImportableNativeType?).flatMap(Data.cs_fromImportableNativeType) {
                            
                            let count = defaultValue.count
                            let bytes = defaultValue.withUnsafeBytes { (pointer: UnsafePointer<UInt8>) in
@@ -168,7 +159,7 @@ public extension DynamicSchema {
                                return (0 ..< (count / MemoryLayout<UInt8>.size))
                                    .map({ "\("0x\(String(pointer[$0], radix: 16, uppercase: false))")" })
                            }
-                            defaultString = ", default: Data(bytes: [\(bytes.joined(separator: ", "))])"
+                            defaultString = ", initial: Data(bytes: [\(bytes.joined(separator: ", "))])"
                        }
                    case .transformableAttributeType:
                        if let attributeValueClassName = attribute.attributeValueClassName {
@@ -181,11 +172,11 @@ public extension DynamicSchema {
                        }
                        if let defaultValue = attribute.defaultValue {
                            
-                            defaultString = ", default: /* \"\(defaultValue)\" */"
+                            defaultString = ", initial: /* \"\(defaultValue)\" */"
                        }
                        else if !attribute.isOptional {
                            
-                            defaultString = ", default: /* required */"
+                            defaultString = ", initial: /* required */"
                        }
                    default:
                        fatalError("Unsupported attribute type: \(attribute.attributeType.rawValue)")
--- a/Sources/ImportableAttributeType.swift
+++ b/Sources/ImportableAttributeType.swift
@@ -78,26 +78,9 @@ public protocol ImportableAttributeType: QueryableAttributeType {
 }


-// MARK: - EmptyableAttributeType
-
-/**
- `ImportableAttributeType`s that have a natural "empty" value. Example: `0` for `Int`, `""` for `String`.
- 
- - Discussion: Not all `ImportableAttributeType`s can have empty values. `URL`s and `Date`s for example have no obvious empty values.
- */
-public protocol EmptyableAttributeType: ImportableAttributeType {
-    
-    /**
-     Returns the default "empty" value for this type.
-     */
-    @inline(__always)
-    static func cs_emptyValue() -> Self
-}
-
-
 // MARK: - Bool

-extension Bool: ImportableAttributeType, EmptyableAttributeType {
+extension Bool: ImportableAttributeType {
    
    // MARK: ImportableAttributeType
    
@@ -114,21 +97,11 @@ extension Bool: ImportableAttributeType, EmptyableAttributeType {
        
        return self.cs_toQueryableNativeType()
    }
-    
-    
-    // MARK: EmptyableAttributeType
-    
-    @inline(__always)
-    public static func cs_emptyValue() -> Bool {
-        
-        return false
-    }
 }

-
 // MARK: - CGFloat

-extension CGFloat: ImportableAttributeType, EmptyableAttributeType {
+extension CGFloat: ImportableAttributeType {
    
    // MARK: ImportableAttributeType
    
@@ -145,21 +118,12 @@ extension CGFloat: ImportableAttributeType, EmptyableAttributeType {
        
        return self.cs_toQueryableNativeType()
    }
-    
-    
-    // MARK: EmptyableAttributeType
-    
-    @inline(__always)
-    public static func cs_emptyValue() -> CGFloat {
-        
-        return 0
-    }
 }


 // MARK: - Data

-extension Data: ImportableAttributeType, EmptyableAttributeType {
+extension Data: ImportableAttributeType {
    
    // MARK: ImportableAttributeType
    
@@ -176,15 +140,6 @@ extension Data: ImportableAttributeType, EmptyableAttributeType {
        
        return self.cs_toQueryableNativeType()
    }
-    
-    
-    // MARK: EmptyableAttributeType
-    
-    @inline(__always)
-    public static func cs_emptyValue() -> Data {
-        
-        return Data()
-    }
 }


@@ -212,7 +167,7 @@ extension Date: ImportableAttributeType {

 // MARK: - Double

-extension Double: ImportableAttributeType, EmptyableAttributeType {
+extension Double: ImportableAttributeType {
    
    // MARK: ImportableAttributeType
    
@@ -229,21 +184,12 @@ extension Double: ImportableAttributeType, EmptyableAttributeType {
        
        return self.cs_toQueryableNativeType()
    }
-    
-    
-    // MARK: EmptyableAttributeType
-    
-    @inline(__always)
-    public static func cs_emptyValue() -> Double {
-        
-        return 0
-    }
 }


 // MARK: - Float

-extension Float: ImportableAttributeType, EmptyableAttributeType {
+extension Float: ImportableAttributeType {
    
    // MARK: ImportableAttributeType
    
@@ -260,21 +206,12 @@ extension Float: ImportableAttributeType, EmptyableAttributeType {
        
        return self.cs_toQueryableNativeType()
    }
-    
-    
-    // MARK: EmptyableAttributeType
-    
-    @inline(__always)
-    public static func cs_emptyValue() -> Float {
-        
-        return 0
-    }
 }


 // MARK: - Int

-extension Int: ImportableAttributeType, EmptyableAttributeType {
+extension Int: ImportableAttributeType {
    
    // MARK: ImportableAttributeType
    
@@ -291,21 +228,12 @@ extension Int: ImportableAttributeType, EmptyableAttributeType {
        
        return self.cs_toQueryableNativeType()
    }
-    
-    
-    // MARK: EmptyableAttributeType
-    
-    @inline(__always)
-    public static func cs_emptyValue() -> Int {
-        
-        return 0
-    }
 }


 // MARK: - Int8

-extension Int8: ImportableAttributeType, EmptyableAttributeType {
+extension Int8: ImportableAttributeType {
    
    // MARK: ImportableAttributeType
    
@@ -322,21 +250,12 @@ extension Int8: ImportableAttributeType, EmptyableAttributeType {
        
        return self.cs_toQueryableNativeType()
    }
-    
-    
-    // MARK: EmptyableAttributeType
-    
-    @inline(__always)
-    public static func cs_emptyValue() -> Int8 {
-        
-        return 0
-    }
 }


 // MARK: - Int16

-extension Int16: ImportableAttributeType, EmptyableAttributeType {
+extension Int16: ImportableAttributeType {
    
    // MARK: ImportableAttributeType
    
@@ -353,21 +272,12 @@ extension Int16: ImportableAttributeType, EmptyableAttributeType {
        
        return self.cs_toQueryableNativeType()
    }
-    
-    
-    // MARK: EmptyableAttributeType
-    
-    @inline(__always)
-    public static func cs_emptyValue() -> Int16 {
-        
-        return 0
-    }
 }


 // MARK: - Int32

-extension Int32: ImportableAttributeType, EmptyableAttributeType {
+extension Int32: ImportableAttributeType {
    
    // MARK: ImportableAttributeType
    
@@ -384,21 +294,12 @@ extension Int32: ImportableAttributeType, EmptyableAttributeType {
        
        return self.cs_toQueryableNativeType()
    }
-    
-    
-    // MARK: EmptyableAttributeType
-    
-    @inline(__always)
-    public static func cs_emptyValue() -> Int32 {
-        
-        return 0
-    }
 }


 // MARK: - Int64

-extension Int64: ImportableAttributeType, EmptyableAttributeType {
+extension Int64: ImportableAttributeType {
    
    // MARK: ImportableAttributeType
    
@@ -415,21 +316,12 @@ extension Int64: ImportableAttributeType, EmptyableAttributeType {
        
        return self.cs_toQueryableNativeType()
    }
-    
-    
-    // MARK: EmptyableAttributeType
-    
-    @inline(__always)
-    public static func cs_emptyValue() -> Int64 {
-        
-        return 0
-    }
 }


 // MARK: - NSData

-extension NSData: ImportableAttributeType, EmptyableAttributeType {
+extension NSData: ImportableAttributeType {
    
    // MARK: ImportableAttributeType
    
@@ -446,15 +338,6 @@ extension NSData: ImportableAttributeType, EmptyableAttributeType {
        
        return self.cs_toQueryableNativeType()
    }
-    
-    
-    // MARK: EmptyableAttributeType
-    
-    @nonobjc @inline(__always)
-    public class func cs_emptyValue() -> Self {
-        
-        return self.init()
-    }
 }


@@ -482,7 +365,7 @@ extension NSDate: ImportableAttributeType {

 // MARK: - NSNumber

-extension NSNumber: ImportableAttributeType, EmptyableAttributeType {
+extension NSNumber: ImportableAttributeType {
    
    // MARK: ImportableAttributeType
    
@@ -499,21 +382,12 @@ extension NSNumber: ImportableAttributeType, EmptyableAttributeType {
        
        return self.cs_toQueryableNativeType()
    }
-    
-    
-    // MARK: EmptyableAttributeType
-    
-    @nonobjc @inline(__always)
-    public class func cs_emptyValue() -> Self {
-        
-        return self.init()
-    }
 }


 // MARK: - NSString

-extension NSString: ImportableAttributeType, EmptyableAttributeType {
+extension NSString: ImportableAttributeType {
    
    // MARK: ImportableAttributeType
    
@@ -530,15 +404,6 @@ extension NSString: ImportableAttributeType, EmptyableAttributeType {
        
        return self.cs_toQueryableNativeType()
    }
-    
-    
-    // MARK: EmptyableAttributeType
-    
-    @nonobjc @inline(__always)
-    public class func cs_emptyValue() -> Self {
-        
-        return self.init()
-    }
 }


@@ -588,7 +453,7 @@ extension NSUUID: ImportableAttributeType {

 // MARK: - String

-extension String: ImportableAttributeType, EmptyableAttributeType {
+extension String: ImportableAttributeType {
    
    // MARK: ImportableAttributeType
    
@@ -605,15 +470,6 @@ extension String: ImportableAttributeType, EmptyableAttributeType {
        
        return self.cs_toQueryableNativeType()
    }
-    
-    
-    // MARK: EmptyableAttributeType
-    
-    @inline(__always)
-    public static func cs_emptyValue() -> String {
-        
-        return ""
-    }
 }


--- a/Sources/Info.plist
+++ b/Sources/Info.plist
@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>4.0.5</string>
+	<string>4.1.3</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
--- a/Sources/LegacySQLiteStore.swift
+++ b/Sources/LegacySQLiteStore.swift
@@ -86,6 +86,11 @@ public final class LegacySQLiteStore: LocalStorage {
    
    public var localStorageOptions: LocalStorageOptions
    
+    public func cs_finalizeStorageAndWait(soureModelHint: NSManagedObjectModel) throws {
+        
+        fatalError()
+    }
+    
    public func cs_eraseStorageAndWait(metadata: [String: Any], soureModelHint: NSManagedObjectModel?) throws {
        
        fatalError()
--- a/Sources/NSManagedObjectContext+Querying.swift
+++ b/Sources/NSManagedObjectContext+Querying.swift
@@ -62,7 +62,7 @@ extension NSManagedObjectContext: FetchableSource, QueryableSource {
                
                return object
            }
-            return T.cs_fromRaw(object: existingRawObject)
+            return type(of: object).cs_fromRaw(object: existingRawObject)
        }
        catch {
            
--- a/Sources/OrderBy.swift
+++ b/Sources/OrderBy.swift
@@ -172,3 +172,17 @@ public struct OrderBy: FetchClause, QueryClause, DeleteClause, Hashable {
        return (self.sortDescriptors as NSArray).hashValue
    }
 }
+
+
+// MARK: - Sequence where Element == OrderBy
+
+public extension Sequence where Iterator.Element == OrderBy {
+    
+    /**
+     Combines multiple `OrderBy` predicates together
+     */
+    public func combined() -> OrderBy {
+        
+        return OrderBy(self.flatMap({ $0.sortDescriptors }))
+    }
+}
--- a/Sources/PartialObject.swift
+++ b/Sources/PartialObject.swift
@@ -0,0 +1,173 @@
+//
+//  PartialObject.swift
+//  CoreStore
+//
+//  Copyright © 2017 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import CoreData
+import Foundation
+
+
+// MARK: - PartialObject
+
+/**
+ A `PartialObject` is only used when overriding getters and setters for `CoreStoreObject` properties. Custom getters and setters are implemented as a closure that "overrides" the default property getter/setter. The closure receives a `PartialObject<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties' static typing, and so loading those info everytime KVO invokes this accessor method incurs a heavy performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `PartialObject<O>`, make sure to use `PartialObject<O>.persistentValue(for:)` instead of `PartialObject<O>.value(for:)`, which would unintentionally execute the same closure again recursively.
+ */
+public struct PartialObject<O: CoreStoreObject> {
+    
+    public func completeObject() -> O {
+        
+        return O.cs_fromRaw(object: self.rawObject)
+    }
+    
+    
+    // MARK: Value.Required accessors/mutators
+    
+    public func value<V: ImportableAttributeType>(for property: (O) -> ValueContainer<O>.Required<V>) -> V {
+        
+        return V.cs_fromImportableNativeType(
+            self.rawObject.value(forKey: property(O.meta).keyPath)! as! V.ImportableNativeType
+        )!
+    }
+    
+    public func setValue<V: ImportableAttributeType>(_ value: V, for property: (O) -> ValueContainer<O>.Required<V>) {
+        
+        self.rawObject.setValue(
+            value.cs_toImportableNativeType(),
+            forKey: property(O.meta).keyPath
+        )
+    }
+    
+    public func primitiveValue<V: ImportableAttributeType>(for property: (O) -> ValueContainer<O>.Required<V>) -> V {
+        
+        return V.cs_fromImportableNativeType(
+            self.rawObject.primitiveValue(forKey: property(O.meta).keyPath)! as! V.ImportableNativeType
+        )!
+    }
+    
+    public func setPrimitiveValue<V: ImportableAttributeType>(_ value: V, for property: (O) -> ValueContainer<O>.Required<V>) {
+        
+        self.rawObject.setPrimitiveValue(
+            value.cs_toImportableNativeType(),
+            forKey: property(O.meta).keyPath
+        )
+    }
+    
+    
+    // MARK: Value.Optional utilities
+    
+    public func value<V: ImportableAttributeType>(for property: (O) -> ValueContainer<O>.Optional<V>) -> V? {
+        
+        return (self.rawObject.value(forKey: property(O.meta).keyPath) as! V.ImportableNativeType?)
+            .flatMap(V.cs_fromImportableNativeType)
+    }
+    
+    public func setValue<V: ImportableAttributeType>(_ value: V?, for property: (O) -> ValueContainer<O>.Optional<V>) {
+        
+        self.rawObject.setValue(
+            value?.cs_toImportableNativeType(),
+            forKey: property(O.meta).keyPath
+        )
+    }
+    
+    public func primitiveValue<V: ImportableAttributeType>(for property: (O) -> ValueContainer<O>.Optional<V>) -> V? {
+        
+        return (self.rawObject.primitiveValue(forKey: property(O.meta).keyPath) as! V.ImportableNativeType?)
+            .flatMap(V.cs_fromImportableNativeType)
+    }
+    
+    public func setPrimitiveValue<V: ImportableAttributeType>(_ value: V?, for property: (O) -> ValueContainer<O>.Optional<V>) {
+        
+        self.rawObject.setPrimitiveValue(
+            value?.cs_toImportableNativeType(),
+            forKey: property(O.meta).keyPath
+        )
+    }
+    
+    
+    // MARK: Transformable.Required utilities
+    
+    public func value<V: NSCoding & NSCopying>(for property: (O) -> TransformableContainer<O>.Required<V>) -> V {
+        
+        return self.rawObject.value(forKey: property(O.meta).keyPath)! as! V
+    }
+    
+    public func setValue<V: NSCoding & NSCopying>(_ value: V, for property: (O) -> TransformableContainer<O>.Required<V>) {
+        
+        self.rawObject.setValue(
+            value,
+            forKey: property(O.meta).keyPath
+        )
+    }
+    
+    public func primitiveValue<V: NSCoding & NSCopying>(for property: (O) -> TransformableContainer<O>.Required<V>) -> V {
+        
+        return self.rawObject.primitiveValue(forKey: property(O.meta).keyPath)! as! V
+    }
+    
+    public func setPrimitiveValue<V: NSCoding & NSCopying>(_ value: V, for property: (O) -> TransformableContainer<O>.Required<V>) {
+        
+        self.rawObject.setPrimitiveValue(
+            value,
+            forKey: property(O.meta).keyPath
+        )
+    }
+    
+    
+    // MARK: Transformable.Optional utilities
+    
+    public func value<V: NSCoding & NSCopying>(for property: (O) -> TransformableContainer<O>.Optional<V>) -> V? {
+        
+        return self.rawObject.value(forKey: property(O.meta).keyPath) as! V?
+    }
+    
+    public func setValue<V: NSCoding & NSCopying>(_ value: V?, for property: (O) -> TransformableContainer<O>.Optional<V>) {
+        
+        self.rawObject.setValue(
+            value,
+            forKey: property(O.meta).keyPath
+        )
+    }
+    
+    public func primitiveValue<V: NSCoding & NSCopying>(for property: (O) -> TransformableContainer<O>.Optional<V>) -> V? {
+        
+        return self.rawObject.primitiveValue(forKey: property(O.meta).keyPath) as! V?
+    }
+    
+    public func setPrimitiveValue<V: NSCoding & NSCopying>(_ value: V?, for property: (O) -> TransformableContainer<O>.Optional<V>) {
+        
+        self.rawObject.setPrimitiveValue(
+            value,
+            forKey: property(O.meta).keyPath
+        )
+    }
+    
+    
+    // MARK: Internal
+    
+    internal let rawObject: NSManagedObject
+    
+    internal init(_ rawObject: NSManagedObject) {
+        
+        self.rawObject = rawObject
+    }
+}
--- a/Sources/Relationship.swift
+++ b/Sources/Relationship.swift
@@ -97,8 +97,8 @@ public enum RelationshipContainer<O: CoreStoreObject> {
        public convenience init(
            _ keyPath: KeyPath,
            deleteRule: DeleteRule = .nullify,
-            versionHashModifier: String? = nil,
-            renamingIdentifier: String? = nil,
+            versionHashModifier: @autoclosure @escaping () -> String? = nil,
+            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {
            
            self.init(
@@ -132,8 +132,8 @@ public enum RelationshipContainer<O: CoreStoreObject> {
            _ keyPath: KeyPath,
            inverse: @escaping (D) -> RelationshipContainer<D>.ToOne<O>,
            deleteRule: DeleteRule = .nullify,
-            versionHashModifier: String? = nil,
-            renamingIdentifier: String? = nil,
+            versionHashModifier: @autoclosure @escaping () -> String? = nil,
+            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {
            
            self.init(
@@ -167,8 +167,8 @@ public enum RelationshipContainer<O: CoreStoreObject> {
            _ keyPath: KeyPath,
            inverse: @escaping (D) -> RelationshipContainer<D>.ToManyOrdered<O>,
            deleteRule: DeleteRule = .nullify,
-            versionHashModifier: String? = nil,
-            renamingIdentifier: String? = nil,
+            versionHashModifier: @autoclosure @escaping () -> String? = nil,
+            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {
            
            self.init(
@@ -202,8 +202,8 @@ public enum RelationshipContainer<O: CoreStoreObject> {
            _ keyPath: KeyPath,
            inverse: @escaping (D) -> RelationshipContainer<D>.ToManyUnordered<O>,
            deleteRule: DeleteRule = .nullify,
-            versionHashModifier: String? = nil,
-            renamingIdentifier: String? = nil,
+            versionHashModifier: @autoclosure @escaping () -> String? = nil,
+            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {
            
            self.init(
@@ -242,8 +242,8 @@ public enum RelationshipContainer<O: CoreStoreObject> {
        internal let minCount: Int = 0
        internal let maxCount: Int = 1
        internal let inverse: (type: CoreStoreObject.Type, keyPath: () -> KeyPath?)
-        internal let versionHashModifier: String?
-        internal let renamingIdentifier: String?
+        internal let versionHashModifier: () -> String?
+        internal let renamingIdentifier: () -> String?
        internal let affectedByKeyPaths: () -> Set<String>
        internal weak var parentObject: CoreStoreObject?
        
@@ -294,7 +294,7 @@ public enum RelationshipContainer<O: CoreStoreObject> {
        
        // MARK: Private
        
-        private init(keyPath: KeyPath, inverseKeyPath: @escaping () -> KeyPath?, deleteRule: DeleteRule, versionHashModifier: String?, renamingIdentifier: String?, affectedByKeyPaths: @autoclosure @escaping () -> Set<String>) {
+        private init(keyPath: KeyPath, inverseKeyPath: @escaping () -> KeyPath?, deleteRule: DeleteRule, versionHashModifier: @autoclosure @escaping () -> String?, renamingIdentifier: @autoclosure @escaping () -> String?, affectedByKeyPaths: @autoclosure @escaping () -> Set<String>) {
            
            self.keyPath = keyPath
            self.deleteRule = deleteRule.nativeValue
@@ -345,8 +345,8 @@ public enum RelationshipContainer<O: CoreStoreObject> {
            minCount: Int = 0,
            maxCount: Int = 0,
            deleteRule: DeleteRule = .nullify,
-            versionHashModifier: String? = nil,
-            renamingIdentifier: String? = nil,
+            versionHashModifier: @autoclosure @escaping () -> String? = nil,
+            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {
            
            self.init(
@@ -386,8 +386,8 @@ public enum RelationshipContainer<O: CoreStoreObject> {
            maxCount: Int = 0,
            inverse: @escaping (D) -> RelationshipContainer<D>.ToOne<O>,
            deleteRule: DeleteRule = .nullify,
-            versionHashModifier: String? = nil,
-            renamingIdentifier: String? = nil,
+            versionHashModifier: @autoclosure @escaping () -> String? = nil,
+            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {
            
            self.init(
@@ -427,8 +427,8 @@ public enum RelationshipContainer<O: CoreStoreObject> {
            maxCount: Int = 0,
            inverse: @escaping (D) -> RelationshipContainer<D>.ToManyOrdered<O>,
            deleteRule: DeleteRule = .nullify,
-            versionHashModifier: String? = nil,
-            renamingIdentifier: String? = nil,
+            versionHashModifier: @autoclosure @escaping () -> String? = nil,
+            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {
            
            self.init(
@@ -468,8 +468,8 @@ public enum RelationshipContainer<O: CoreStoreObject> {
            maxCount: Int = 0,
            inverse: @escaping (D) -> RelationshipContainer<D>.ToManyUnordered<O>,
            deleteRule: DeleteRule = .nullify,
-            versionHashModifier: String? = nil,
-            renamingIdentifier: String? = nil,
+            versionHashModifier: @autoclosure @escaping () -> String? = nil,
+            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {
            
            self.init(
@@ -511,8 +511,8 @@ public enum RelationshipContainer<O: CoreStoreObject> {
        internal let minCount: Int
        internal let maxCount: Int
        internal let inverse: (type: CoreStoreObject.Type, keyPath: () -> KeyPath?)
-        internal let versionHashModifier: String?
-        internal let renamingIdentifier: String?
+        internal let versionHashModifier: () -> String?
+        internal let renamingIdentifier: () -> String?
        internal let affectedByKeyPaths: () -> Set<String>
        internal weak var parentObject: CoreStoreObject?
        
@@ -563,7 +563,7 @@ public enum RelationshipContainer<O: CoreStoreObject> {
        
        // MARK: Private
        
-        private init(keyPath: String, minCount: Int, maxCount: Int, inverseKeyPath: @escaping () -> String?, deleteRule: DeleteRule, versionHashModifier: String?, renamingIdentifier: String?, affectedByKeyPaths: @autoclosure @escaping () -> Set<String>) {
+        private init(keyPath: String, minCount: Int, maxCount: Int, inverseKeyPath: @escaping () -> String?, deleteRule: DeleteRule, versionHashModifier: @autoclosure @escaping () -> String?, renamingIdentifier: @autoclosure @escaping () -> String?, affectedByKeyPaths: @autoclosure @escaping () -> Set<String>) {
            
            self.keyPath = keyPath
            self.deleteRule = deleteRule.nativeValue
@@ -619,8 +619,8 @@ public enum RelationshipContainer<O: CoreStoreObject> {
            deleteRule: DeleteRule = .nullify,
            minCount: Int = 0,
            maxCount: Int = 0,
-            versionHashModifier: String? = nil,
-            renamingIdentifier: String? = nil,
+            versionHashModifier: @autoclosure @escaping () -> String? = nil,
+            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {
            
            self.init(
@@ -660,8 +660,8 @@ public enum RelationshipContainer<O: CoreStoreObject> {
            deleteRule: DeleteRule = .nullify,
            minCount: Int = 0,
            maxCount: Int = 0,
-            versionHashModifier: String? = nil,
-            renamingIdentifier: String? = nil,
+            versionHashModifier: @autoclosure @escaping () -> String? = nil,
+            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {
            
            self.init(
@@ -701,8 +701,8 @@ public enum RelationshipContainer<O: CoreStoreObject> {
            deleteRule: DeleteRule = .nullify,
            minCount: Int = 0,
            maxCount: Int = 0,
-            versionHashModifier: String? = nil,
-            renamingIdentifier: String? = nil,
+            versionHashModifier: @autoclosure @escaping () -> String? = nil,
+            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {
            
            self.init(
@@ -742,8 +742,8 @@ public enum RelationshipContainer<O: CoreStoreObject> {
            deleteRule: DeleteRule = .nullify,
            minCount: Int = 0,
            maxCount: Int = 0,
-            versionHashModifier: String? = nil,
-            renamingIdentifier: String? = nil,
+            versionHashModifier: @autoclosure @escaping () -> String? = nil,
+            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {
            
            self.init(
@@ -785,8 +785,8 @@ public enum RelationshipContainer<O: CoreStoreObject> {
        internal let minCount: Int
        internal let maxCount: Int
        internal let inverse: (type: CoreStoreObject.Type, keyPath: () -> KeyPath?)
-        internal let versionHashModifier: String?
-        internal let renamingIdentifier: String?
+        internal let versionHashModifier: () -> String?
+        internal let renamingIdentifier: () -> String?
        internal let affectedByKeyPaths: () -> Set<String>
        internal weak var parentObject: CoreStoreObject?
        
@@ -837,7 +837,7 @@ public enum RelationshipContainer<O: CoreStoreObject> {
        
        // MARK: Private
        
-        private init(keyPath: KeyPath, inverseKeyPath: @escaping () -> KeyPath?, deleteRule: DeleteRule, minCount: Int, maxCount: Int, versionHashModifier: String?, renamingIdentifier: String?, affectedByKeyPaths: @autoclosure @escaping () -> Set<String>) {
+        private init(keyPath: KeyPath, inverseKeyPath: @escaping () -> KeyPath?, deleteRule: DeleteRule, minCount: Int, maxCount: Int, versionHashModifier: @autoclosure @escaping () -> String?, renamingIdentifier: @autoclosure @escaping () -> String?, affectedByKeyPaths: @autoclosure @escaping () -> Set<String>) {
            
            self.keyPath = keyPath
            self.deleteRule = deleteRule.nativeValue
@@ -1204,21 +1204,3 @@ extension RelationshipContainer.ToManyUnordered {
        return relationship.nativeValue.isEqual(relationship2.nativeValue)
    }
 }
-
-
-// MARK: - RelationshipProtocol
-
-internal protocol RelationshipProtocol: class {
-    
-    var keyPath: KeyPath { get }
-    var isToMany: Bool { get }
-    var isOrdered: Bool { get }
-    var deleteRule: NSDeleteRule { get }
-    var inverse: (type: CoreStoreObject.Type, keyPath: () -> KeyPath?) { get }
-    var affectedByKeyPaths: () -> Set<String> { get }
-    weak var parentObject: CoreStoreObject? { get set }
-    var versionHashModifier: String? { get }
-    var renamingIdentifier: String? { get }
-    var minCount: Int { get }
-    var maxCount: Int { get }
-}
--- a/Sources/RelationshipProtocol.swift
+++ b/Sources/RelationshipProtocol.swift
@@ -0,0 +1,45 @@
+//
+//  RelationshipProtocol.swift
+//  CoreStore
+//
+//  Copyright © 2017 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import Foundation
+import CoreData
+
+
+// MARK: - RelationshipProtocol
+
+internal protocol RelationshipProtocol: class {
+    
+    var keyPath: KeyPath { get }
+    var isToMany: Bool { get }
+    var isOrdered: Bool { get }
+    var deleteRule: NSDeleteRule { get }
+    var inverse: (type: CoreStoreObject.Type, keyPath: () -> KeyPath?) { get }
+    var affectedByKeyPaths: () -> Set<String> { get }
+    weak var parentObject: CoreStoreObject? { get set }
+    var versionHashModifier: () -> String? { get }
+    var renamingIdentifier: () -> String? { get }
+    var minCount: Int { get }
+    var maxCount: Int { get }
+}
--- a/Sources/SQLiteStore.swift
+++ b/Sources/SQLiteStore.swift
@@ -117,6 +117,20 @@ public final class SQLiteStore: LocalStorage {
        )
    }
    
+    /**
+     Queries the file size (in bytes) of the store, or `nil` if the file does not exist yet
+     */
+    public func fileSize() -> UInt64? {
+        
+        guard let attribute = try? FileManager.default.attributesOfItem(atPath: self.fileURL.path),
+            let sizeAttribute = attribute[.size],
+            let fileSize = sizeAttribute as? NSNumber else {
+                
+                return nil
+        }
+        return fileSize.uint64Value
+    }
+    
    
    // MARK: StorageInterface
    
@@ -191,6 +205,22 @@ public final class SQLiteStore: LocalStorage {
        return storeOptions
    }
    
+    /**
+     Called by the `DataStack` to perform checkpoint operations on the storage. For `SQLiteStore`, this converts the database's WAL journaling mode to DELETE to force a checkpoint.
+     */
+    public func cs_finalizeStorageAndWait(soureModelHint: NSManagedObjectModel) throws {
+        
+        _ = try withExtendedLifetime(NSPersistentStoreCoordinator(managedObjectModel: soureModelHint)) { (coordinator: NSPersistentStoreCoordinator) in
+            
+            try coordinator.addPersistentStore(
+                ofType: type(of: self).storeType,
+                configurationName: self.configuration,
+                at: fileURL,
+                options: [NSSQLitePragmasOption: ["journal_mode": "DELETE"]]
+            )
+        }
+    }
+    
    /**
     Called by the `DataStack` to perform actual deletion of the store file from disk. Do not call directly! The `sourceModel` argument is a hint for the existing store's model version. For `SQLiteStore`, this converts the database's WAL journaling mode to DELETE before deleting the file.
     */
--- a/Sources/Select.swift
+++ b/Sources/Select.swift
@@ -401,13 +401,14 @@ internal extension Collection where Iterator.Element == SelectTerm {
                return entity.attributesByName[components[0]]
                
            default:
-                guard let relationship = entity.relationshipsByName[components[0]] else {
-                    
-                    return nil
+                guard let relationship = entity.relationshipsByName[components[0]],
+                    let destinationEntity = relationship.destinationEntity else {
+                        
+                        return nil
                }
                return attributeDescription(
                    for: components.dropFirst().joined(separator: "."),
-                    in: relationship.entity
+                    in: destinationEntity
                )
            }
        }
@@ -418,18 +419,7 @@ internal extension Collection where Iterator.Element == SelectTerm {
            switch term {
                
            case ._attribute(let keyPath):
-                let entityDescription = fetchRequest.entity!
-                if let attributeDescription = attributeDescription(for: keyPath, in: entityDescription) {
-                    
-                    propertiesToFetch.append(attributeDescription)
-                }
-                else {
-                    
-                    CoreStore.log(
-                        .warning,
-                        message: "The key path \"\(keyPath)\" could not be resolved in entity \(cs_typeName(entityDescription.managedObjectClassName)) as an attribute and will be ignored by \(cs_typeName(owner)) query clause."
-                    )
-                }
+                propertiesToFetch.append(keyPath)
                
            case ._aggregate(let function, let keyPath, let alias, let nativeType):
                let entityDescription = fetchRequest.entity!
--- a/Sources/StorageInterface.swift
+++ b/Sources/StorageInterface.swift
@@ -141,6 +141,11 @@ public protocol LocalStorage: StorageInterface {
     */
    func dictionary(forOptions options: LocalStorageOptions) -> [AnyHashable: Any]?
    
+    /**
+     Called by the `DataStack` to perform checkpoint operations on the storage. (SQLite stores for example, can convert the database's WAL journaling mode to DELETE to force a checkpoint)
+     */
+    func cs_finalizeStorageAndWait(soureModelHint: NSManagedObjectModel) throws
+    
    /**
     Called by the `DataStack` to perform actual deletion of the store file from disk. **Do not call directly!** The `sourceModel` argument is a hint for the existing store's model version. Implementers can use the `sourceModel` to perform necessary store operations. (SQLite stores for example, can convert WAL journaling mode to DELETE before deleting)
     */
--- a/Sources/SynchronousDataTransaction.swift
+++ b/Sources/SynchronousDataTransaction.swift
@@ -158,6 +158,10 @@ public final class SynchronousDataTransaction: BaseDataTransaction {
        self.isCommitted = true
        let result = self.context.saveSynchronously(waitForMerge: waitForMerge)
        self.result = result
+        defer {
+            
+            self.context.reset()
+        }
        return result
    }
    
--- a/Sources/Transformable.swift
+++ b/Sources/Transformable.swift
@@ -0,0 +1,597 @@
+//
+//  Transformable.swift
+//  CoreStore
+//
+//  Copyright © 2017 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import CoreData
+import Foundation
+
+
+// MARK: - DynamicObject
+
+public extension DynamicObject where Self: CoreStoreObject {
+    
+    /**
+     The containing type for transformable properties. `Transformable` properties support types that conforms to `NSCoding & NSCopying`.
+     ```
+     class Animal: CoreStoreObject {
+     let species = Value.Required<String>("species")
+     let nickname = Value.Optional<String>("nickname")
+     let color = Transformable.Optional<UIColor>("color")
+     }
+     ```
+     - Important: `Transformable` properties are required to be stored properties. Computed properties will be ignored, including `lazy` and `weak` properties.
+     */
+    public typealias Transformable = TransformableContainer<Self>
+}
+
+
+// MARK: - TransformableContainer
+
+/**
+ The containing type for transformable properties. Use the `DynamicObject.Transformable` typealias instead for shorter syntax.
+ ```
+ class Animal: CoreStoreObject {
+     let species = Value.Required<String>("species")
+     let nickname = Value.Optional<String>("nickname")
+     let color = Transformable.Optional<UIColor>("color")
+ }
+ ```
+ */
+public enum TransformableContainer<O: CoreStoreObject> {
+
+    // MARK: - Required
+
+    /**
+     The containing type for transformable properties. Any type that conforms to `NSCoding & NSCopying` are supported.
+     ```
+     class Animal: CoreStoreObject {
+         let species = Value.Required<String>("species")
+         let nickname = Value.Optional<String>("nickname")
+         let color = Transformable.Optional<UIColor>("color")
+     }
+     ```
+     - Important: `Transformable.Required` properties are required to be stored properties. Computed properties will be ignored, including `lazy` and `weak` properties.
+     */
+    public final class Required<V: NSCoding & NSCopying>: AttributeProtocol {
+
+        /**
+         Initializes the metadata for the property.
+         ```
+         class Animal: CoreStoreObject {
+             let species = Value.Required<String>("species")
+             let color = Transformable.Required<UIColor>(
+                 "color",
+                 initial: UIColor.clear,
+                 isTransient: true,
+                 customGetter: Animal.getColor(_:)
+             )
+         }
+
+         private static func getColor(_ partialObject: PartialObject<Animal>) -> UIColor {
+             let cachedColor = partialObject.primitiveValue(for: { $0.color })
+             if cachedColor != UIColor.clear {
+
+                 return cachedColor
+             }
+             let color: UIColor
+             switch partialObject.value(for: { $0.species }) {
+
+             case "Swift": color = UIColor.orange
+             case "Bulbasaur": color = UIColor.green
+             default: color = UIColor.black
+             }
+             partialObject.setPrimitiveValue(color, for: { $0.color })
+             return color
+         }
+         ```
+         - parameter keyPath: the permanent attribute name for this property.
+         - parameter initial: the initial value for the property when the object is first created. Defaults to the `ImportableAttributeType`'s empty value if not specified.
+         - parameter isIndexed: `true` if the property should be indexed for searching, otherwise `false`. Defaults to `false` if not specified.
+         - parameter isTransient: `true` if the property is transient, otherwise `false`. Defaults to `false` if not specified. The transient flag specifies whether or not a property's value is ignored when an object is saved to a persistent store. Transient properties are not saved to the persistent store, but are still managed for undo, redo, validation, and so on.
+         - parameter versionHashModifier: used to mark or denote a property as being a different "version" than another even if all of the values which affect persistence are equal. (Such a difference is important in cases where the properties are unchanged but the format or content of its data are changed.)
+         - parameter renamingIdentifier: used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property and a destination entity property that share the same identifier indicate that a property mapping should be configured to migrate from the source to the destination. If unset, the identifier will be the property's name.
+         - parameter customGetter: use this closure as an "override" for the default property getter. The closure receives a `PartialObject<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties' static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `PartialObject<O>`, make sure to use `PartialObject<O>.primitiveValue(for:)` instead of `PartialObject<O>.value(for:)`, which would unintentionally execute the same closure again recursively.
+         - parameter customSetter: use this closure as an "override" for the default property setter. The closure receives a `PartialObject<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties' static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `PartialObject<O>`, make sure to use `PartialObject<O>.setPrimitiveValue(_:for:)` instead of `PartialObject<O>.setValue(_:for:)`, which would unintentionally execute the same closure again recursively.
+         - parameter affectedByKeyPaths: a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.
+         */
+        public init(
+            _ keyPath: KeyPath,
+            initial: @autoclosure @escaping () -> V,
+            isIndexed: Bool = false,
+            isTransient: Bool = false,
+            versionHashModifier: @autoclosure @escaping () -> String? = nil,
+            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
+            customGetter: ((_ partialObject: PartialObject<O>) -> V)? = nil,
+            customSetter: ((_ partialObject: PartialObject<O>, _ newValue: V) -> Void)? = nil,
+            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {
+
+            self.keyPath = keyPath
+            self.defaultValue = initial
+            self.isIndexed = isIndexed
+            self.isTransient = isTransient
+            self.versionHashModifier = versionHashModifier
+            self.renamingIdentifier = renamingIdentifier
+            self.customGetter = customGetter
+            self.customSetter = customSetter
+            self.affectedByKeyPaths = affectedByKeyPaths
+        }
+
+        /**
+         The property value.
+         */
+        public var value: V {
+
+            get {
+
+                CoreStore.assert(
+                    self.parentObject != nil,
+                    "Attempted to access values from a \(cs_typeName(O.self)) meta object. Meta objects are only used for querying keyPaths and infering types."
+                )
+                return withExtendedLifetime(self.parentObject! as! O) { (object: O) in
+
+                    CoreStore.assert(
+                        object.rawObject!.isRunningInAllowedQueue() == true,
+                        "Attempted to access \(cs_typeName(O.self))'s value outside it's designated queue."
+                    )
+                    if let customGetter = self.customGetter {
+
+                        return customGetter(PartialObject<O>(object.rawObject!))
+                    }
+                    return object.rawObject!.value(forKey: self.keyPath)! as! V
+                }
+            }
+            set {
+
+                CoreStore.assert(
+                    self.parentObject != nil,
+                    "Attempted to access values from a \(cs_typeName(O.self)) meta object. Meta objects are only used for querying keyPaths and infering types."
+                )
+                return withExtendedLifetime(self.parentObject! as! O) { (object: O) in
+
+                    CoreStore.assert(
+                        object.rawObject!.isRunningInAllowedQueue() == true,
+                        "Attempted to access \(cs_typeName(O.self))'s value outside it's designated queue."
+                    )
+                    CoreStore.assert(
+                        object.rawObject!.isEditableInContext() == true,
+                        "Attempted to update a \(cs_typeName(O.self))'s value from outside a transaction."
+                    )
+                    if let customSetter = self.customSetter {
+
+                        return customSetter(PartialObject<O>(object.rawObject!), newValue)
+                    }
+                    object.rawObject!.setValue(
+                        newValue,
+                        forKey: self.keyPath
+                    )
+                }
+            }
+        }
+
+
+        // MARK: AttributeProtocol
+
+        internal static var attributeType: NSAttributeType {
+
+            return .transformableAttributeType
+        }
+
+        public let keyPath: KeyPath
+
+        internal let isOptional = false
+        internal let isIndexed: Bool
+        internal let isTransient: Bool
+        internal let versionHashModifier: () -> String?
+        internal let renamingIdentifier: () -> String?
+        internal let defaultValue: () -> Any?
+        internal let affectedByKeyPaths: () -> Set<String>
+        internal weak var parentObject: CoreStoreObject?
+
+        internal private(set) lazy var getter: CoreStoreManagedObject.CustomGetter? = cs_lazy { [unowned self] in
+
+            guard let customGetter = self.customGetter else {
+
+                return nil
+            }
+            let keyPath = self.keyPath
+            return { (_ id: Any) -> Any? in
+
+                let rawObject = id as! CoreStoreManagedObject
+                rawObject.willAccessValue(forKey: keyPath)
+                defer {
+
+                    rawObject.didAccessValue(forKey: keyPath)
+                }
+                let value = customGetter(PartialObject<O>(rawObject))
+                return value
+            }
+        }
+
+        internal private(set) lazy var setter: CoreStoreManagedObject.CustomSetter? = cs_lazy { [unowned self] in
+
+            guard let customSetter = self.customSetter else {
+
+                return nil
+            }
+            let keyPath = self.keyPath
+            return { (_ id: Any, _ newValue: Any?) -> Void in
+
+                let rawObject = id as! CoreStoreManagedObject
+                rawObject.willChangeValue(forKey: keyPath)
+                defer {
+
+                    rawObject.didChangeValue(forKey: keyPath)
+                }
+                customSetter(
+                    PartialObject<O>(rawObject),
+                    newValue as! V
+                )
+            }
+        }
+
+
+        // MARK: Private
+
+        private let customGetter: ((_ partialObject: PartialObject<O>) -> V)?
+        private let customSetter: ((_ partialObject: PartialObject<O>, _ newValue: V) -> Void)?
+
+
+        // MARK: Deprecated
+
+        @available(*, deprecated: 3.1, renamed: "init(_:initial:isIndexed:isTransient:versionHashModifier:renamingIdentifier:customGetter:customSetter:affectedByKeyPaths:)")
+        public convenience init(
+            _ keyPath: KeyPath,
+            `default`: @autoclosure @escaping () -> V,
+            isIndexed: Bool = false,
+            isTransient: Bool = false,
+            versionHashModifier: @autoclosure @escaping () -> String? = nil,
+            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
+            customGetter: ((_ partialObject: PartialObject<O>) -> V)? = nil,
+            customSetter: ((_ partialObject: PartialObject<O>, _ newValue: V) -> Void)? = nil,
+            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {
+
+            self.init(
+                keyPath,
+                initial: `default`,
+                isIndexed: isIndexed,
+                isTransient: isTransient,
+                versionHashModifier: versionHashModifier,
+                renamingIdentifier: renamingIdentifier,
+                customGetter: customGetter,
+                customSetter: customSetter,
+                affectedByKeyPaths: affectedByKeyPaths
+            )
+        }
+    }
+
+
+    // MARK: - Optional
+
+    /**
+     The containing type for optional transformable properties. Any type that conforms to `NSCoding & NSCopying` are supported.
+     ```
+     class Animal: CoreStoreObject {
+         let species = Value.Required<String>("species")
+         let nickname = Value.Optional<String>("nickname")
+         let color = Transformable.Optional<UIColor>("color")
+     }
+     ```
+     - Important: `Transformable.Optional` properties are required to be stored properties. Computed properties will be ignored, including `lazy` and `weak` properties.
+     */
+    public final class Optional<V: NSCoding & NSCopying>: AttributeProtocol {
+
+        /**
+         Initializes the metadata for the property.
+         ```
+         class Animal: CoreStoreObject {
+             let species = Value.Required<String>("species")
+             let color = Transformable.Optional<UIColor>(
+                 "color",
+                 isTransient: true,
+                 customGetter: Animal.getColor(_:)
+             )
+         }
+
+         private static func getColor(_ partialObject: PartialObject<Animal>) -> UIColor? {
+             if let cachedColor = partialObject.primitiveValue(for: { $0.color }) {
+                 return cachedColor
+             }
+             let color: UIColor?
+             switch partialObject.value(for: { $0.species }) {
+
+             case "Swift": color = UIColor.orange
+             case "Bulbasaur": color = UIColor.green
+             default: return nil
+             }
+             partialObject.setPrimitiveValue(color, for: { $0.color })
+             return color
+         }
+         ```
+         - parameter keyPath: the permanent attribute name for this property.
+         - parameter initial: the initial value for the property when the object is first created. Defaults to the `ImportableAttributeType`'s empty value if not specified.
+         - parameter isIndexed: `true` if the property should be indexed for searching, otherwise `false`. Defaults to `false` if not specified.
+         - parameter isTransient: `true` if the property is transient, otherwise `false`. Defaults to `false` if not specified. The transient flag specifies whether or not a property's value is ignored when an object is saved to a persistent store. Transient properties are not saved to the persistent store, but are still managed for undo, redo, validation, and so on.
+         - parameter versionHashModifier: used to mark or denote a property as being a different "version" than another even if all of the values which affect persistence are equal. (Such a difference is important in cases where the properties are unchanged but the format or content of its data are changed.)
+         - parameter renamingIdentifier: used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property and a destination entity property that share the same identifier indicate that a property mapping should be configured to migrate from the source to the destination. If unset, the identifier will be the property's name.
+         - parameter customGetter: use this closure as an "override" for the default property getter. The closure receives a `PartialObject<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties' static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `PartialObject<O>`, make sure to use `PartialObject<O>.primitiveValue(for:)` instead of `PartialObject<O>.value(for:)`, which would unintentionally execute the same closure again recursively.
+         - parameter customSetter: use this closure as an "override" for the default property setter. The closure receives a `PartialObject<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties' static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `PartialObject<O>`, make sure to use `PartialObject<O>.setPrimitiveValue(_:for:)` instead of `PartialObject<O>.setValue(_:for:)`, which would unintentionally execute the same closure again recursively.
+         - parameter affectedByKeyPaths: a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.
+         */
+        public init(
+            _ keyPath: KeyPath,
+            initial: @autoclosure @escaping () -> V? = nil,
+            isIndexed: Bool = false,
+            isTransient: Bool = false,
+            versionHashModifier: @autoclosure @escaping () -> String? = nil,
+            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
+            customGetter: ((_ partialObject: PartialObject<O>) -> V?)? = nil,
+            customSetter: ((_ partialObject: PartialObject<O>, _ newValue: V?) -> Void)? = nil,
+            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {
+
+            self.keyPath = keyPath
+            self.defaultValue = initial
+            self.isIndexed = isIndexed
+            self.isTransient = isTransient
+            self.versionHashModifier = versionHashModifier
+            self.renamingIdentifier = renamingIdentifier
+            self.customGetter = customGetter
+            self.customSetter = customSetter
+            self.affectedByKeyPaths = affectedByKeyPaths
+        }
+
+        /**
+         The property value.
+         */
+        public var value: V? {
+
+            get {
+
+                CoreStore.assert(
+                    self.parentObject != nil,
+                    "Attempted to access values from a \(cs_typeName(O.self)) meta object. Meta objects are only used for querying keyPaths and infering types."
+                )
+                return withExtendedLifetime(self.parentObject! as! O) { (object: O) in
+
+                    CoreStore.assert(
+                        object.rawObject!.isRunningInAllowedQueue() == true,
+                        "Attempted to access \(cs_typeName(O.self))'s value outside it's designated queue."
+                    )
+                    if let customGetter = self.customGetter {
+
+                        return customGetter(PartialObject<O>(object.rawObject!))
+                    }
+                    return object.rawObject!.value(forKey: self.keyPath) as! V?
+                }
+            }
+            set {
+
+                CoreStore.assert(
+                    self.parentObject != nil,
+                    "Attempted to access values from a \(cs_typeName(O.self)) meta object. Meta objects are only used for querying keyPaths and infering types."
+                )
+                return withExtendedLifetime(self.parentObject! as! O) { (object: O) in
+
+                    CoreStore.assert(
+                        object.rawObject!.isRunningInAllowedQueue() == true,
+                        "Attempted to access \(cs_typeName(O.self))'s value outside it's designated queue."
+                    )
+                    CoreStore.assert(
+                        object.rawObject!.isEditableInContext() == true,
+                        "Attempted to update a \(cs_typeName(O.self))'s value from outside a transaction."
+                    )
+                    if let customSetter = self.customSetter {
+
+                        return customSetter(PartialObject<O>(object.rawObject!), newValue)
+                    }
+                    object.rawObject!.setValue(
+                        newValue,
+                        forKey: self.keyPath
+                    )
+                }
+            }
+        }
+
+
+        // MARK: AttributeProtocol
+
+        internal static var attributeType: NSAttributeType {
+
+            return .transformableAttributeType
+        }
+
+        public let keyPath: KeyPath
+
+        internal let isOptional = true
+        internal let isIndexed: Bool
+        internal let isTransient: Bool
+        internal let versionHashModifier: () -> String?
+        internal let renamingIdentifier: () -> String?
+        internal let defaultValue: () -> Any?
+        internal let affectedByKeyPaths: () -> Set<String>
+        internal weak var parentObject: CoreStoreObject?
+
+        internal private(set) lazy var getter: CoreStoreManagedObject.CustomGetter? = cs_lazy { [unowned self] in
+
+            guard let customGetter = self.customGetter else {
+
+                return nil
+            }
+            let keyPath = self.keyPath
+            return { (_ id: Any) -> Any? in
+
+                let rawObject = id as! CoreStoreManagedObject
+                rawObject.willAccessValue(forKey: keyPath)
+                defer {
+
+                    rawObject.didAccessValue(forKey: keyPath)
+                }
+                let value = customGetter(PartialObject<O>(rawObject))
+                return value
+            }
+        }
+
+        internal private(set) lazy var setter: CoreStoreManagedObject.CustomSetter? = cs_lazy { [unowned self] in
+
+            guard let customSetter = self.customSetter else {
+
+                return nil
+            }
+            let keyPath = self.keyPath
+            return { (_ id: Any, _ newValue: Any?) -> Void in
+
+                let rawObject = id as! CoreStoreManagedObject
+                rawObject.willChangeValue(forKey: keyPath)
+                defer {
+
+                    rawObject.didChangeValue(forKey: keyPath)
+                }
+                customSetter(
+                    PartialObject<O>(rawObject),
+                    newValue as! V?
+                )
+            }
+        }
+
+
+        // MARK: Private
+
+        private let customGetter: ((_ partialObject: PartialObject<O>) -> V?)?
+        private let customSetter: ((_ partialObject: PartialObject<O>, _ newValue: V?) -> Void)?
+
+
+        // MARK: Deprecated
+
+        @available(*, deprecated: 3.1, renamed: "init(_:initial:isIndexed:isTransient:versionHashModifier:renamingIdentifier:customGetter:customSetter:affectedByKeyPaths:)")
+        public convenience init(
+            _ keyPath: KeyPath,
+            `default`: @autoclosure @escaping () -> V?,
+            isIndexed: Bool = false,
+            isTransient: Bool = false,
+            versionHashModifier: @autoclosure @escaping () -> String? = nil,
+            renamingIdentifier: @autoclosure @escaping () -> String? = nil,
+            customGetter: ((_ partialObject: PartialObject<O>) -> V?)? = nil,
+            customSetter: ((_ partialObject: PartialObject<O>, _ newValue: V?) -> Void)? = nil,
+            affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = []) {
+
+            self.init(
+                keyPath,
+                initial: `default`,
+                isIndexed: isIndexed,
+                isTransient: isTransient,
+                versionHashModifier: versionHashModifier,
+                renamingIdentifier: renamingIdentifier,
+                customGetter: customGetter,
+                customSetter: customSetter,
+                affectedByKeyPaths: affectedByKeyPaths
+            )
+        }
+    }
+}
+
+
+// MARK: - Operations
+
+infix operator .= : AssignmentPrecedence
+infix operator .== : ComparisonPrecedence
+
+extension TransformableContainer.Required {
+    
+    /**
+     Assigns a transformable value to the property. The operation
+     ```
+     animal.color .= UIColor.red
+     ```
+     is equivalent to
+     ```
+     animal.color.value = UIColor.red
+     ```
+     */
+    public static func .= (_ property: TransformableContainer<O>.Required<V>, _ newValue: V) {
+        
+        property.value = newValue
+    }
+    
+    /**
+     Assigns a transformable value from another property. The operation
+     ```
+     animal.nickname .= anotherAnimal.species
+     ```
+     is equivalent to
+     ```
+     animal.nickname.value = anotherAnimal.species.value
+     ```
+     */
+    public static func .= <O2>(_ property: TransformableContainer<O>.Required<V>, _ property2: TransformableContainer<O2>.Required<V>) {
+        
+        property.value = property2.value
+    }
+}
+
+extension TransformableContainer.Optional {
+    
+    /**
+     Assigns an optional transformable value to the property. The operation
+     ```
+     animal.color .= UIColor.red
+     ```
+     is equivalent to
+     ```
+     animal.color.value = UIColor.red
+     ```
+     */
+    public static func .= (_ property: TransformableContainer<O>.Optional<V>, _ newValue: V?) {
+        
+        property.value = newValue
+    }
+    
+    /**
+     Assigns an optional transformable value from another property. The operation
+     ```
+     animal.color .= anotherAnimal.color
+     ```
+     is equivalent to
+     ```
+     animal.color.value = anotherAnimal.color.value
+     ```
+     */
+    public static func .= <O2>(_ property: TransformableContainer<O>.Optional<V>, _ property2: TransformableContainer<O2>.Optional<V>) {
+        
+        property.value = property2.value
+    }
+    
+    /**
+     Assigns a transformable value from another property. The operation
+     ```
+     animal.color .= anotherAnimal.color
+     ```
+     is equivalent to
+     ```
+     animal.color.value = anotherAnimal.color.value
+     ```
+     */
+    public static func .= <O2>(_ property: TransformableContainer<O>.Optional<V>, _ property2: TransformableContainer<O2>.Required<V>) {
+        
+        property.value = property2.value
+    }
+}
--- a/Sources/Value.swift
+++ b/Sources/Value.swift
--- a/Sources/Where.swift
+++ b/Sources/Where.swift
@@ -42,6 +42,36 @@ public struct Where: FetchClause, QueryClause, DeleteClause, Hashable {
        return Where(NSCompoundPredicate(type: .and, subpredicates: [left.predicate, right.predicate]))
    }
    
+    /**
+     Combines two `Where` predicates together using `AND` operator.
+     - parameter left: the left hand side `Where` clause
+     - parameter right: the right hand side `Where` clause
+     - returns: Return `left` unchanged if `right` is nil
+     */
+    public static func && (left: Where, right: Where?) -> Where {
+        
+        if let right = right {
+            
+            return left && right
+        }
+        return left
+    }
+    
+    /**
+     Combines two `Where` predicates together using `AND` operator.
+     - parameter left: the left hand side `Where` clause
+     - parameter right: the right hand side `Where` clause
+     - returns: Returns `right` unchanged if `left` is nil
+     */
+    public static func && (left: Where?, right: Where) -> Where {
+        
+        if let left = left {
+            
+            return left && right
+        }
+        return right
+    }
+    
    /**
     Combines two `Where` predicates together using `OR` operator
     */
@@ -50,6 +80,36 @@ public struct Where: FetchClause, QueryClause, DeleteClause, Hashable {
        return Where(NSCompoundPredicate(type: .or, subpredicates: [left.predicate, right.predicate]))
    }
    
+    /**
+     Combines two `Where` predicates together using `OR` operator.
+     - parameter left: the left hand side `Where` clause
+     - parameter right: the right hand side `Where` clause
+     - returns: Returns `left` unchanged if `right` is nil
+     */
+    public static func || (left: Where, right: Where?) -> Where {
+        
+        if let right = right {
+            
+            return left || right
+        }
+        return left
+    }
+    
+    /**
+     Combines two `Where` predicates together using `OR` operator.
+     - parameter left: the left hand side `Where` clause
+     - parameter right: the right hand side `Where` clause
+     - returns: Return `right` unchanged if `left` is nil
+     */
+    public static func || (left: Where?, right: Where) -> Where {
+        
+        if let left = left {
+            
+            return left || right
+        }
+        return right
+    }
+    
    /**
     Inverts the predicate of a `Where` clause using `NOT` operator
     */
@@ -216,3 +276,25 @@ public struct Where: FetchClause, QueryClause, DeleteClause, Hashable {
        return self.predicate.hashValue
    }
 }
+
+
+// MARK: - Sequence where Element == Where
+
+public extension Sequence where Iterator.Element == Where {
+    
+    /**
+     Combines multiple `Where` predicates together using `AND` operator
+     */
+    public func combinedByAnd() -> Where {
+        
+        return Where(NSCompoundPredicate(type: .and, subpredicates: self.map({ $0.predicate })))
+    }
+    
+    /**
+     Combines multiple `Where` predicates together using `OR` operator
+     */
+    public func combinedByOr() -> Where {
+        
+        return Where(NSCompoundPredicate(type: .or, subpredicates: self.map({ $0.predicate })))
+    }
+}
Author	SHA1	Message	Date
John Rommel Estropia	85706a3c57	version bump	2017-09-22 23:43:19 +09:00
John Rommel Estropia	c5ae4606b9	move cocoapods.yml	2017-09-22 23:41:07 +09:00
John Rommel Estropia	fa682215c5	version bump	2017-09-22 23:26:15 +09:00
John Estropia	dc73cd6dd9	added a yml file for pod try (#200 )	2017-09-22 15:48:02 +09:00
John Rommel Estropia	f436b26e8e	allow compound keypaths in Select terms	2017-09-08 01:28:24 +09:00
John Estropia	3ebc44b546	optimize redundant casting in printCoreStoreSchema()	2017-08-31 18:28:23 +09:00
John Estropia	68f1027ba7	fix code misuse in readme	2017-08-31 17:55:10 +09:00
John Estropia	211e69023e	version bump	2017-08-23 12:59:36 +09:00
John Rommel Estropia	2912dcf010	iOS 11 fixed the NSFetchRequest.affectedStores bug	2017-08-23 12:55:02 +09:00
John Rommel Estropia	3e00a3da06	fix demo app errors	2017-08-17 09:24:33 +09:00
John Rommel Estropia	86be046c9f	updated podspec	2017-08-16 20:43:10 +09:00
John Rommel Estropia	0f10bc3349	version bump	2017-08-16 20:26:22 +09:00
John Rommel Estropia	9685f0aef2	#191	2017-08-16 20:21:26 +09:00
John Rommel Estropia	3bd459bb1a	updated docs	2017-08-16 20:09:09 +09:00
John Rommel Estropia	28b43f33fa	Value.Required now requires an "initial:" parameter. For previous CoreStoreObject users, use the appropriate empty value for your existing properties (0 for numeric types, false for Bool, "" for String)	2017-08-08 18:36:25 +09:00
John Estropia	a366bcf1a3	Merge branch 'develop' of github.com:JohnEstropia/CoreStore into develop	2017-07-11 15:47:20 +09:00
John Rommel Estropia	c6e68ac24f	reset transactions' context on deinit to break reference cycles in unsafed many-to-many relationships	2017-07-05 23:32:45 +09:00
John Estropia	a11915db12	minor cleanup	2017-07-04 12:21:46 +09:00
John Rommel Estropia	961f39a806	add internal utilities to force checkpoint operations on SQLite	2017-07-01 17:05:10 +09:00
John Rommel Estropia	3096cb784c	add internal utilities to force checkpoint operations on SQLite	2017-07-01 16:45:11 +09:00
John Rommel Estropia	809aa4ff96	allow querying file size on SQLiteStore	2017-07-01 11:50:23 +09:00
John Estropia	8d926d25ec	Merge pull request #177 from blender/feature/optional-where-chaining Add optional && and \|\| operators to Where clause	2017-06-28 13:32:16 +09:00
Tommaso Piazza	790454f514	Add optional && and \|\| operators to Where clause	2017-06-27 13:58:16 +02:00
John Rommel Estropia	f72efc80b2	added utilities for combining Where arrays and OrderBy arrays	2017-06-24 17:42:56 +09:00
John Estropia	e8eb309d82	Added source docs on usage of custom getters and setters for CoreStoreObject properties (Value.Required, etc)	2017-06-20 20:32:27 +09:00
John Rommel Estropia	d0c3203e63	force reset contexts after autocommit	2017-06-17 21:50:21 +09:00
John Rommel Estropia	f5b3901caa	fix tests and demo app	2017-06-17 02:13:54 +09:00
John Rommel Estropia	1a99fea820	complete PartialObject utilities	2017-06-17 01:55:36 +09:00
John Rommel Estropia	195b60615b	added missing utilities	2017-06-16 01:42:09 +09:00
John Rommel Estropia	2c394965b8	remove direct access to CoreStoreObject.primitiveValues and replace PartialObject<O>	2017-06-16 01:02:23 +09:00
John Rommel Estropia	746d697691	WIP: new PartialObject to act as faster KVC wrappers when implementing custom getters and setters for CoreStoreObject	2017-06-15 08:27:08 +09:00