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Code Issues 95 Packages Projects Releases 10 Wiki Activity

WIP: make fetching methods throwable

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This commit is contained in:
John Estropia
2019-01-11 19:52:12 +09:00
parent 42d1f41939
commit 5777831565
16 changed files with 326 additions and 226 deletions
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95
Sources/NSManagedObjectContext+Querying.swift
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@@ -101,88 +101,76 @@ extension NSManagedObjectContext: FetchableSource, QueryableSource {
}
@nonobjc
public func fetchOne<D>(_ from: From<D>, _ fetchClauses: FetchClause...) -> D? {
public func fetchOne<D>(_ from: From<D>, _ fetchClauses: FetchClause...) throws -> D? {
return self.fetchOne(from, fetchClauses)
return try self.fetchOne(from, fetchClauses)
}
@nonobjc
public func fetchOne<D>(_ from: From<D>, _ fetchClauses: [FetchClause]) -> D? {
public func fetchOne<D>(_ from: From<D>, _ fetchClauses: [FetchClause]) throws -> D? {
let fetchRequest = CoreStoreFetchRequest()
let storeFound = from.applyToFetchRequest(fetchRequest, context: self)
try from.applyToFetchRequest(fetchRequest, context: self)
fetchRequest.fetchLimit = 1
fetchRequest.resultType = .managedObjectResultType
fetchClauses.forEach { $0.applyToFetchRequest(fetchRequest) }
guard storeFound else {
return nil
}
return self.fetchOne(fetchRequest.dynamicCast()).flatMap(from.entityClass.cs_fromRaw)
return try self.fetchOne(fetchRequest.dynamicCast()).flatMap(from.entityClass.cs_fromRaw)
}
@nonobjc
public func fetchOne<B: FetchChainableBuilderType>(_ clauseChain: B) -> B.ObjectType? {
public func fetchOne<B: FetchChainableBuilderType>(_ clauseChain: B) throws -> B.ObjectType? {
return self.fetchOne(clauseChain.from, clauseChain.fetchClauses)
return try self.fetchOne(clauseChain.from, clauseChain.fetchClauses)
}
@nonobjc
public func fetchAll<D>(_ from: From<D>, _ fetchClauses: FetchClause...) -> [D]? {
public func fetchAll<D>(_ from: From<D>, _ fetchClauses: FetchClause...) throws -> [D] {
return self.fetchAll(from, fetchClauses)
return try self.fetchAll(from, fetchClauses)
}
@nonobjc
public func fetchAll<D>(_ from: From<D>, _ fetchClauses: [FetchClause]) -> [D]? {
public func fetchAll<D>(_ from: From<D>, _ fetchClauses: [FetchClause]) throws -> [D] {
let fetchRequest = CoreStoreFetchRequest()
let storeFound = from.applyToFetchRequest(fetchRequest, context: self)
try from.applyToFetchRequest(fetchRequest, context: self)
fetchRequest.fetchLimit = 0
fetchRequest.resultType = .managedObjectResultType
fetchClauses.forEach { $0.applyToFetchRequest(fetchRequest) }
guard storeFound else {
return nil
}
let entityClass = from.entityClass
return self.fetchAll(fetchRequest.dynamicCast())?.map(entityClass.cs_fromRaw)
return try self.fetchAll(fetchRequest.dynamicCast())?.map(entityClass.cs_fromRaw)
}
@nonobjc
public func fetchAll<B: FetchChainableBuilderType>(_ clauseChain: B) -> [B.ObjectType]? {
public func fetchAll<B: FetchChainableBuilderType>(_ clauseChain: B) throw -> [B.ObjectType] {
return self.fetchAll(clauseChain.from, clauseChain.fetchClauses)
return try self.fetchAll(clauseChain.from, clauseChain.fetchClauses)
}
@nonobjc
public func fetchCount<D>(_ from: From<D>, _ fetchClauses: FetchClause...) -> Int? {
public func fetchCount<D>(_ from: From<D>, _ fetchClauses: FetchClause...) throws -> Int {
return self.fetchCount(from, fetchClauses)
return try self.fetchCount(from, fetchClauses)
}
@nonobjc
public func fetchCount<D>(_ from: From<D>, _ fetchClauses: [FetchClause]) -> Int? {
public func fetchCount<D>(_ from: From<D>, _ fetchClauses: [FetchClause]) throws -> Int {
let fetchRequest = CoreStoreFetchRequest()
let storeFound = from.applyToFetchRequest(fetchRequest, context: self)
try from.applyToFetchRequest(fetchRequest, context: self)
fetchClauses.forEach { $0.applyToFetchRequest(fetchRequest) }
guard storeFound else {
return nil
}
return self.fetchCount(fetchRequest.dynamicCast())
return try self.fetchCount(fetchRequest.dynamicCast())
}
@nonobjc
public func fetchCount<B: FetchChainableBuilderType>(_ clauseChain: B) -> Int? {
public func fetchCount<B: FetchChainableBuilderType>(_ clauseChain: B) throws -> Int {
return self.fetchCount(clauseChain.from, clauseChain.fetchClauses)
return try self.fetchCount(clauseChain.from, clauseChain.fetchClauses)
}
@nonobjc
@@ -207,8 +195,7 @@ extension NSManagedObjectContext: FetchableSource, QueryableSource {
}
return self.fetchObjectID(fetchRequest.dynamicCast())
}
// TODO: docs
@nonobjc
public func fetchObjectID<B: FetchChainableBuilderType>(_ clauseChain: B) -> NSManagedObjectID? {
@@ -225,7 +212,7 @@ extension NSManagedObjectContext: FetchableSource, QueryableSource {
public func fetchObjectIDs<D>(_ from: From<D>, _ fetchClauses: [FetchClause]) -> [NSManagedObjectID]? {
let fetchRequest = CoreStoreFetchRequest()
let storeFound = from.applyToFetchRequest(fetchRequest, context: self)
try from.applyToFetchRequest(fetchRequest, context: self)
fetchRequest.fetchLimit = 0
fetchRequest.resultType = .managedObjectIDResultType
@@ -237,8 +224,7 @@ extension NSManagedObjectContext: FetchableSource, QueryableSource {
}
return self.fetchObjectIDs(fetchRequest.dynamicCast())
}
// TODO: docs
@nonobjc
public func fetchObjectIDs<B: FetchChainableBuilderType>(_ clauseChain: B) -> [NSManagedObjectID]? {
@@ -383,7 +369,7 @@ internal extension NSManagedObjectContext {
// MARK: Fetching
@nonobjc
internal func fetchOne<D: NSManagedObject>(_ fetchRequest: NSFetchRequest<D>) -> D? {
internal func fetchOne<D: NSManagedObject>(_ fetchRequest: NSFetchRequest<D>) throws -> D? {
var fetchResults: [D]?
var fetchError: Error?
@@ -399,18 +385,19 @@ internal extension NSManagedObjectContext {
}
}
if fetchResults == nil {
let coreStoreError = CoreStoreError(fetchError)
CoreStore.log(
CoreStoreError(fetchError),
coreStoreError,
"Failed executing fetch request."
)
return nil
throw coreStoreError
}
return fetchResults?.first
}
@nonobjc
internal func fetchAll<D: NSManagedObject>(_ fetchRequest: NSFetchRequest<D>) -> [D]? {
internal func fetchAll<D: NSManagedObject>(_ fetchRequest: NSFetchRequest<D>) throws -> [D] {
var fetchResults: [D]?
var fetchError: Error?
@@ -426,18 +413,19 @@ internal extension NSManagedObjectContext {
}
}
if fetchResults == nil {
let coreStoreError = CoreStoreError(fetchError)
CoreStore.log(
CoreStoreError(fetchError),
coreStoreError,
"Failed executing fetch request."
)
return nil
throw coreStoreError
}
return fetchResults
}
@nonobjc
internal func fetchCount(_ fetchRequest: NSFetchRequest<NSFetchRequestResult>) -> Int? {
internal func fetchCount(_ fetchRequest: NSFetchRequest<NSFetchRequestResult>) throws -> Int {
var count = 0
var countError: Error?
@@ -453,12 +441,13 @@ internal extension NSManagedObjectContext {
}
}
if count == NSNotFound {
let coreStoreError = CoreStoreError(fetchError)
CoreStore.log(
CoreStoreError(countError),
coreStoreError,
"Failed executing count request."
)
return nil
throw coreStoreError
}
return count
}