使用Realm尝试删除一个对象会引发异常(“只能在写事务中将对象添加到Realm中……") [英] Using Realm trying to delete one object raises an exception ('Can only add an object to a Realm in a write transaction...')

问题描述

我正在尝试删除领域中的1个对象，但无法执行此方法.有什么不对?

I'm trying to delete 1 object in realm but I can't perform this method. Is there something wrong?

var realm = RLMRealm.defaultRealm() 
realm.beginWriteTransaction()
var soo = Sample3()
soo.sampleKey = "edit1"
soo.id = 0
realm.deleteObject(soo)
realm.commitWriteTransaction()
println("deleted")

出现此错误...

swiftRealm[50559:847671] *** Terminating app due to uncaught exception 'RLMException', reason: 'Can only add an object to a Realm in a write transaction - call beginWriteTransaction on an RLMRealm instance first.'

推荐答案

我有点困惑，您是要添加对象还是删除对象?我看到您创建了一个Sample3对象，我想它是一个RLMObject，但是恕我直言，您仅在要将Object添加到Realm时才创建一个新的RLMObject.

I am a little confused, are you trying to addObject or deleteObject? I saw that you created a Sample3 object which I suppose is an RLMObject, but IMHO you only create a new RLMObject when you want to addObject to Realm.

如果要从Realm中删除对象，则应先从Realm中获取该对象，然后再将其删除.像这样:

If you want to delete an object from Realm, you should fetch the object from Realm first, then delete it. Something like:

Sample3 *obj = [Sample3 objectsWithPredicate:[NSPredicate predicateWithFormat:@"sampleKey = %@ AND id = %d", @"edit1", 0]][0]
[realm deleteObject(obj)]

对不起，我不熟悉Swift语法，因此上面的Obj-c中. 希望对您有所帮助.

Sorry, I am not familiar with Swift syntax, so the above in Obj-c. Hope it helps.

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