Question

这是具有多对多关系的数据库设计。这是我的方法

-(void)fetchChannelData:(id)responseObject{

            [MagicalRecord saveWithBlock:^(NSManagedObjectContext *localContext) {
                NSArray *channels = [responseObject objectForKey:@"channels"] ;
                for (NSDictionary *channelStack in channels) {
                    NSLog(@"Tenant id %@",[[ NSUserDefaults standardUserDefaults ] valueForKey:@"test"]);
                    ChannelsData *channels = [ChannelsData MR_importFromObject:channelStack inContext:localContext];
                    [channels setCategory:[[channelStack valueForKey:@"category"] firstObject]];
                    [channels setTenantID:[[ NSUserDefaults standardUserDefaults ] valueForKey:@"test"]];

                    NSArray *channelLogo = [channelStack objectForKey:@"channelImages"] ;
                    for (NSDictionary *channelLogoStack in channelLogo) {
                        ChannelImages *images = [ChannelImages MR_importFromObject:channelLogoStack inContext:localContext];
                        [channels addImagesObject:images];
                        [images setChannelID:channels.channelID];

                    }
                }
            } completion:^(BOOL contextDidSave, NSError *error) {
                if (contextDidSave) {
                    [self fetchListing];

                }
            }];





}

我导入数据的位置。我有下拉列表，我为特定数据选择了不同的API点。所有提取不同的数据。现在的问题是，当我再次启动我的应用程序时，再次调用服务，而不是数据更新，它再次插入它。我已经在每个实体上使用relatedByAttribute让他们的＆＃34; ID＆＃34;是主键。] 1] 1

魔法记录更新已经获取数据

0 个答案: