version bump

CoreStore.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
     s.name = "CoreStore"
-    s.version = "2.0.1"
+    s.version = "2.0.3"
     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"

CoreStoreTests/ErrorTests.swift

@@ -147,7 +147,7 @@ final class ErrorTests: XCTestCase {
                 "key3": NSDate()
             ]
         )
-        let error = CoreStoreError.InternalError(NSError: internalError)
+        let error = CoreStoreError(internalError)
         XCTAssertEqual((error as NSError).domain, CoreStoreErrorDomain)
         XCTAssertEqual((error as NSError).code, CoreStoreErrorCode.InternalError.rawValue)
         

Sources/Fetching and Querying/Concrete Clauses/Select.swift

@@ -715,9 +715,28 @@ internal extension CollectionType where Generator.Element == SelectTerm {
         fetchRequest.includesPendingChanges = false
         fetchRequest.resultType = .DictionaryResultType
         
-        let entityDescription = fetchRequest.entity!
-        let propertiesByName = entityDescription.propertiesByName
-        let attributesByName = entityDescription.attributesByName
+        func attributeDescriptionForKeyPath(keyPath: String, inEntity entity: NSEntityDescription) -> NSAttributeDescription? {
+            
+            let components = keyPath.componentsSeparatedByString(".")
+            switch components.count {
+                
+            case 0:
+                return nil
+                
+            case 1:
+                return entity.attributesByName[components[0]]
+                
+            default:
+                guard let relationship = entity.relationshipsByName[components[0]] else {
+                    
+                    return nil
+                }
+                return attributeDescriptionForKeyPath(
+                    components.dropFirst().joinWithSeparator("."),
+                    inEntity: relationship.entity
+                )
+            }
+        }
         
         var propertiesToFetch = [AnyObject]()
         for term in self {
@@ -725,20 +744,22 @@ internal extension CollectionType where Generator.Element == SelectTerm {
             switch term {
                 
             case ._Attribute(let keyPath):
-                if let propertyDescription = propertiesByName[keyPath] {
+                let entityDescription = fetchRequest.entity!
+                if let attributeDescription = attributeDescriptionForKeyPath(keyPath, inEntity: entityDescription) {
                     
-                    propertiesToFetch.append(propertyDescription)
+                    propertiesToFetch.append(attributeDescription)
                 }
                 else {
                     
                     CoreStore.log(
                         .Warning,
-                        message: "The property \"\(keyPath)\" does not exist in entity \(cs_typeName(entityDescription.managedObjectClassName)) and will be ignored by \(cs_typeName(owner)) query clause."
+                        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."
                     )
                 }
                 
             case ._Aggregate(let function, let keyPath, let alias, let nativeType):
-                if let attributeDescription = attributesByName[keyPath] {
+                let entityDescription = fetchRequest.entity!
+                if let attributeDescription = attributeDescriptionForKeyPath(keyPath, inEntity: entityDescription) {
                     
                     let expressionDescription = NSExpressionDescription()
                     expressionDescription.name = alias
@@ -754,14 +775,13 @@ internal extension CollectionType where Generator.Element == SelectTerm {
                         forFunction: function,
                         arguments: [NSExpression(forKeyPath: keyPath)]
                     )
-                    
                     propertiesToFetch.append(expressionDescription)
                 }
                 else {
                     
                     CoreStore.log(
                         .Warning,
-                        message: "The attribute \"\(keyPath)\" does not exist in entity \(cs_typeName(entityDescription.managedObjectClassName)) and will be ignored by \(cs_typeName(owner)) query clause."
+                        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."
                     )
                 }
                 

Sources/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>2.0.1</string>
+	<string>2.0.3</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>

Sources/ObjectiveC/CSError.swift

@@ -248,9 +248,17 @@ internal extension ErrorType {
         
         switch self {
             
-        case let error as CoreStoreError:   return error
-        case let error as CSError:          return error.bridgeToSwift
-        default:                            return .Unknown
+        case let error as CoreStoreError:
+            return error
+            
+        case let error as CSError:
+            return error.bridgeToSwift
+            
+        case let error as NSError where self.dynamicType is NSError.Type:
+            return .InternalError(NSError: error)
+            
+        default:
+            return .Unknown
         }
     }
     
@@ -258,9 +266,14 @@ internal extension ErrorType {
         
         switch self {
             
-        case let error as CoreStoreError:   return error.bridgeToObjectiveC
-        case let error as CSError:          return error
-        default:                            return self as NSError
+        case let error as CoreStoreError:
+            return error.bridgeToObjectiveC
+            
+        case let error as CSError:
+            return error
+            
+        default:
+            return self as NSError
         }
     }
 }