无法从另一个线程删除Realm数据库对象(即使在搜索之后) [英] Can't delete Realm database objects from another thread (even after searching)

问题描述

我在此线程中遇到与发布者类似的问题: 无法删除领域数据库中的对象

I'm having a similar problem as the poster in this thread: Unable to delete an object in a realm database

我有一个名为"syncQueue"的队列中的搜索创建的RLMObject子类数组.这是一堆需要发送到服务器的诊断对象.

I have an array of RLMObject subclasses created from a search on a queue called 'syncQueue'. It's a bunch of Diagnostic objects that need to be sent up to the server.

使用 Google将这些对象打包并发送到服务器iOS客户端库.库返回该对象已成功上传后，我想将它们从Realm中删除.我从Realm中获取了一些示例.

These objects are packaged up and sent up to the server using the Google Client Library for iOS. Once the library returns that the objects have been successfully uploaded, I want to delete them out of Realm. I grab some samples out of Realm.

NSArray *samples = [someClass getMySamplesFromRealm];

所以现在我有一系列样本. ^^这发生在使用自己线程的'syncQueue'上.仍然在同一线程上，我们打包并上传示例.因此，有一个类似于以下内容的回调块:

So now I have an array of samples. ^^This happens on the 'syncQueue', which uses its own thread. Still on the same thread, we package and upload the samples. So there's a callback block that looks something like this:

GTLServiceTicket *ticket = [service executeQuery:query completionHandler:^(GTLServiceTicket *ticket, id object, NSError *error)
    {
        [syncHandler removeTicket:ticket];
        if( error )
        {
            // Handle Error
        }
        else
        {
            [diagDataAccessManager deleteObjects:samples];
        }
    }];

这是删除这些对象的代码.

Here is the code that deletes these objects.

1  - (void)deleteObjects:(NSArray *)samples
2  {
3      if (samples.count > 0) 
4      {
5          [[RLMRealm defaultRealm] beginWriteTransaction];
6          for (Diagnostic *diagnostic in samples) 
7          {
8              Diagnostic *diagnosticToDelete = [Diagnostic objectForPrimaryKey:diagnostic.primaryId];
9              [[RLMRealm defaultRealm] deleteObject:diagnosticToDelete];
10         }
11         [[RLMRealm defaultRealm] commitWriteTransaction];
12     }
13     
14 }

因此，我尝试先进行搜索，然后再执行删除操作.但是...

So I'm trying to do a search before I do a delete. However...

在第8行，我得到一个例外:从错误的线程访问领域" 现在，我认为这是因为当我运行Diagnostic objectForPrimaryKey:时，它正在尝试使用与*diagnostic对象，该对象是在另一个线程上创建的.

On line 8, I get an exception: "Realm accessed from incorrect thread" Now, I assume this is because when I run Diagnostic objectForPrimaryKey:, it's trying to use the Realm associated with the *diagnostic object, which was created on another thread.

我的问题是:如果我无法看清它们是哪些这些特定对象，我该如何删除这些特定对象?

My question is: how on Earth can I delete these specific objects, if I can't look at them to figure out which specific objects they are?

任何澄清/建议将不胜感激.

Any clarification/advice would be much appreciated.

推荐答案

您最好的方法是将主键传递给新线程，而不是对象.

Your best will probably be to pass the primary keys to the new thread, rather than the objects.

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