mirror of
https://github.com/zhigang1992/RestKit.git
synced 2026-01-12 22:51:50 +08:00
66 lines
2.5 KiB
Objective-C
66 lines
2.5 KiB
Objective-C
//
|
|
// NSManagedObjectContext+RKAdditions.m
|
|
// RestKit
|
|
//
|
|
// Created by Blake Watters on 3/14/12.
|
|
// Copyright (c) 2009-2012 RestKit. All rights reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
//
|
|
|
|
#import <objc/runtime.h>
|
|
#import "NSManagedObjectContext+RKAdditions.h"
|
|
#import "RKLog.h"
|
|
|
|
@implementation NSManagedObjectContext (RKAdditions)
|
|
|
|
- (id)insertNewObjectForEntityForName:(NSString *)entityName
|
|
{
|
|
return [NSEntityDescription insertNewObjectForEntityForName:entityName inManagedObjectContext:self];
|
|
}
|
|
|
|
- (NSUInteger)countForEntityForName:(NSString *)entityName predicate:(NSPredicate *)predicate error:(NSError **)error
|
|
{
|
|
NSFetchRequest *fetchRequest = [NSFetchRequest fetchRequestWithEntityName:entityName];
|
|
fetchRequest.predicate = predicate;
|
|
return [self countForFetchRequest:fetchRequest error:error];
|
|
}
|
|
|
|
- (BOOL)saveToPersistentStore:(NSError **)error
|
|
{
|
|
__block NSError *localError = nil;
|
|
NSManagedObjectContext *contextToSave = self;
|
|
while (contextToSave) {
|
|
__block BOOL success;
|
|
[contextToSave performBlockAndWait:^{
|
|
success = [contextToSave save:&localError];
|
|
if (! success && localError == nil) RKLogWarning(@"Saving of managed object context failed, but a `nil` value for the `error` argument was returned. This typically indicates an invalid implementation of a key-value validation method exists within your model. This violation of the API contract may result in the save operation being mis-interpretted by callers that rely on the availability of the error.");
|
|
}];
|
|
|
|
if (! success) {
|
|
if (error) *error = localError;
|
|
return NO;
|
|
}
|
|
|
|
if (! contextToSave.parentContext && contextToSave.persistentStoreCoordinator == nil) {
|
|
RKLogWarning(@"Reached the end of the chain of nested managed object contexts without encountering a persistent store coordinator. Objects are not fully persisted.");
|
|
return NO;
|
|
}
|
|
contextToSave = contextToSave.parentContext;
|
|
}
|
|
|
|
return YES;
|
|
}
|
|
|
|
@end
|