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Code Issues 95 Packages Projects Releases 10 Wiki Activity

WIP: rehaul of type-safe fetching and querying

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John Estropia
2017-03-01 19:34:07 +09:00
parent 3224fcf71d
commit 8569c3c524
9 changed files with 638 additions and 390 deletions
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34
Sources/Internal/NSManagedObjectContext+Querying.swift
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@@ -238,13 +238,13 @@ extension NSManagedObjectContext: FetchableSource, QueryableSource {
// MARK: QueryableSource
@nonobjc
public func queryValue<T: NSManagedObject, U: SelectValueResultType>(_ from: From<T>, _ selectClause: Select<U>, _ queryClauses: QueryClause...) -> U? {
public func queryValue<T: NSManagedObject, U: CoreStoreQueryableAttributeType>(_ from: From<T>, _ selectClause: Select<U>, _ queryClauses: QueryClause...) -> U? {
return self.queryValue(from, selectClause, queryClauses)
}
@nonobjc
public func queryValue<T: NSManagedObject, U: SelectValueResultType>(_ from: From<T>, _ selectClause: Select<U>, _ queryClauses: [QueryClause]) -> U? {
public func queryValue<T: NSManagedObject, U: CoreStoreQueryableAttributeType>(_ from: From<T>, _ selectClause: Select<U>, _ queryClauses: [QueryClause]) -> U? {
let fetchRequest = CoreStoreFetchRequest()
let storeFound = from.applyToFetchRequest(fetchRequest, context: self)
@@ -262,6 +262,30 @@ extension NSManagedObjectContext: FetchableSource, QueryableSource {
return self.queryValue(selectTerms, fetchRequest: fetchRequest)
}
@nonobjc
public func queryAttributes<T: NSManagedObject, U: CoreStoreQueryableAttributeType>(_ from: From<T>, _ selectClause: Select<[U]>, _ queryClauses: QueryClause...) -> [[String: Any]]? {
return self.queryAttributes(from, selectClause, queryClauses)
}
@nonobjc
public func queryAttributes<T: NSManagedObject, U: CoreStoreQueryableAttributeType>(_ from: From<T>, _ selectClause: Select<[U]>, _ queryClauses: [QueryClause]) -> [[String: Any]]? {
let fetchRequest = CoreStoreFetchRequest()
let storeFound = from.applyToFetchRequest(fetchRequest, context: self)
fetchRequest.fetchLimit = 0
selectClause.selectTerms.applyToFetchRequest(fetchRequest, owner: selectClause)
queryClauses.forEach { $0.applyToFetchRequest(fetchRequest) }
guard storeFound else {
return nil
}
return self.queryAttributes(fetchRequest)
}
@nonobjc
public func queryAttributes<T: NSManagedObject>(_ from: From<T>, _ selectClause: Select<NSDictionary>, _ queryClauses: QueryClause...) -> [[String: Any]]? {
@@ -415,7 +439,7 @@ internal extension NSManagedObjectContext {
// MARK: Querying
@nonobjc
internal func queryValue<U: SelectValueResultType>(_ selectTerms: [SelectTerm], fetchRequest: NSFetchRequest<NSFetchRequestResult>) -> U? {
internal func queryValue<U: CoreStoreQueryableAttributeType>(_ selectTerms: [SelectTerm], fetchRequest: NSFetchRequest<NSFetchRequestResult>) -> U? {
var fetchResults: [Any]?
var fetchError: Error?
@@ -433,9 +457,9 @@ internal extension NSManagedObjectContext {
if let fetchResults = fetchResults {
if let rawResult = fetchResults.first as? NSDictionary,
let rawObject = rawResult[selectTerms.keyPathForFirstSelectTerm()] {
let rawObject = rawResult[selectTerms.keyPathForFirstSelectTerm()] as? U.QueryableNativeType {
return Select<U>.ReturnType.fromResultObject(rawObject)
return U.cs_fromQueryableNativeType(rawObject)
}
return nil
}