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71 lines
2.3 KiB
71 lines
2.3 KiB
////////////////////////////////////////////////////////////////////////////
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//
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// Copyright 2014 Realm Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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////////////////////////////////////////////////////////////////////////////
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#import "AppDelegate.h"
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#import <Realm/Realm.h>
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// Define your models
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@interface Dog : RLMObject
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@property NSString *name;
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@property NSInteger age;
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@property (readonly) RLMLinkingObjects *owners;
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@end
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RLM_ARRAY_TYPE(Dog)
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@interface Person : RLMObject
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@property NSString *name;
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@property RLMArray<Dog> *dogs;
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@end
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@implementation Person
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@end
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@implementation Dog
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+ (NSDictionary *)linkingObjectsProperties
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{
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// Define "owners" as the inverse relationship to Person.dogs
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return @{ @"owners": [RLMPropertyDescriptor descriptorWithClass:Person.class propertyName:@"dogs"] };
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}
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@end
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@implementation AppDelegate
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- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
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{
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self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
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self.window.rootViewController = [[UIViewController alloc] init];
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[self.window makeKeyAndVisible];
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[[NSFileManager defaultManager] removeItemAtURL:[RLMRealmConfiguration defaultConfiguration].fileURL error:nil];
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RLMRealm *realm = [RLMRealm defaultRealm];
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[realm transactionWithBlock:^{
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[Person createInRealm:realm withValue:@[@"John", @[@[@"Fido", @1]]]];
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[Person createInRealm:realm withValue:@[@"Mary", @[@[@"Rex", @2]]]];
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}];
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// Log all dogs and their owners using the "owners" inverse relationship
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RLMResults *allDogs = [Dog allObjects];
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for (Dog *dog in allDogs) {
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NSArray *ownerNames = [dog.owners valueForKeyPath:@"name"];
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NSLog(@"%@ has %lu owners (%@)", dog.name, (unsigned long)ownerNames.count, ownerNames);
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}
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return YES;
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}
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@end
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