deleteObject 在 Realm 中不起作用
deleteObject doesn't work in Realm
这是我的代码,我不知道自己做错了什么。我正在按照文档中的说明进行操作
http://realm.io/docs/cocoa/0.91.1/#deleting-objects
// Delete Current Object
RLMRealm *realm = RLMRealm.defaultRealm;
[realm beginWriteTransaction];
EBooks *eBookdb = [[EBooks alloc]init];
eBookdb.eBook_ID = [NSString stringWithFormat:@"%@",self.eBookID];
eBookdb.status = @"canceled";
[EBooks createOrUpdateInRealm:realm withObject:eBookdb];
[realm commitWriteTransaction];
//=> break point here before crash
[realm beginWriteTransaction];
[realm deleteObject:eBookdb];
[realm commitWriteTransaction];
应用程序在断点后崩溃并出现以下错误
'Can only delete an object from the Realm it belongs to.'
问题是您正在尝试删除独立的 EBooks
对象,而不是 Realm 中持久存在的对象。如果您将代码更改为以下内容,它应该可以工作:
// Delete Current Object
RLMRealm *realm = RLMRealm.defaultRealm;
[realm beginWriteTransaction];
EBooks *eBookdb = [[EBooks alloc]init];
eBookdb.eBook_ID = [NSString stringWithFormat:@"%@",self.eBookID];
eBookdb.status = @"canceled";
eBookdb = [EBooks createOrUpdateInRealm:realm withObject:eBookdb];
[realm commitWriteTransaction];
[realm beginWriteTransaction];
[realm deleteObject:eBookdb];
[realm commitWriteTransaction];
这是我的代码,我不知道自己做错了什么。我正在按照文档中的说明进行操作 http://realm.io/docs/cocoa/0.91.1/#deleting-objects
// Delete Current Object
RLMRealm *realm = RLMRealm.defaultRealm;
[realm beginWriteTransaction];
EBooks *eBookdb = [[EBooks alloc]init];
eBookdb.eBook_ID = [NSString stringWithFormat:@"%@",self.eBookID];
eBookdb.status = @"canceled";
[EBooks createOrUpdateInRealm:realm withObject:eBookdb];
[realm commitWriteTransaction];
//=> break point here before crash
[realm beginWriteTransaction];
[realm deleteObject:eBookdb];
[realm commitWriteTransaction];
应用程序在断点后崩溃并出现以下错误
'Can only delete an object from the Realm it belongs to.'
问题是您正在尝试删除独立的 EBooks
对象,而不是 Realm 中持久存在的对象。如果您将代码更改为以下内容,它应该可以工作:
// Delete Current Object
RLMRealm *realm = RLMRealm.defaultRealm;
[realm beginWriteTransaction];
EBooks *eBookdb = [[EBooks alloc]init];
eBookdb.eBook_ID = [NSString stringWithFormat:@"%@",self.eBookID];
eBookdb.status = @"canceled";
eBookdb = [EBooks createOrUpdateInRealm:realm withObject:eBookdb];
[realm commitWriteTransaction];
[realm beginWriteTransaction];
[realm deleteObject:eBookdb];
[realm commitWriteTransaction];