指针数据不存储在本地数据库中，解析ios [英] Pointers data not storing in local database parse ios

问题描述

我有一个包含许多includeKeys的查询，它们是指向另一个类的指针。从解析云接收到数据后，所有记录都将使用 pinAll 方法在本地存储。当我回收存储结果时，我可以获取记录，但不能包含指针。

  [query includeKey：@classOne.innerClass]; 
 [query includeKey：@classTwo.innerClass]; 
 [query includeKey：@classThree]; 
 [query includeKey：@classFour]; 
 [查询findObjectsInBackgroundWithBlock：^（NSArray *对象，NSError *错误）{
 [PFObject pinAllInBackground：objects withName：@LocalRecordsblock：^（BOOL succeeded，NSError * error）{
 
}]; 
}]; 
  

我正在获取记录，如

  PFQuery * lquery = [PFQuery queryWithClassName：[ClassName parseClassName]]; 
 [lquery fromPinWithName：@LocalRecords]; 
 BFTask * btask = [[lquery findObjectsInBackground] continueWithSuccessBlock：^ id（BFTask * task）{
 if（task.error）{
 NSLog（@Error：％@，task错误）; 
返回任务; 
} 
}]; 
  

当我尝试访问classOne，classTwo，classThree和classFour中的任何列时，我得到一个异常由于未捕获异常'NSInternalInconsistencyException'终止应用程序，原因：密钥名称没有数据。在获取其值之前调用fetchIfNeeded。

解决方案

这是Parse.com本地数据存储功能中的一个错误适用于iOS。

从1.6.3发行说明：

改进本地一致性使用includeKey和NSNull值进行数据存储/解析查询。

I have a query with many includeKeys which are pointers to another class. After receiving the data from parse cloud all the records are getting stored locally using pinAll method. When I fetch back the results stored, I can able to get the records but not pointers included. See sample code below

[query includeKey:@"classOne.innerClass"];
[query includeKey:@"classTwo.innerClass"];
[query includeKey:@"classThree"];
[query includeKey:@"classFour"];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error){
   [PFObject pinAllInBackground:objects withName:@"LocalRecords" block:^(BOOL succeeded, NSError *error) {

   }];
}];

And I am fetching the records like

PFQuery *lquery = [PFQuery queryWithClassName:[ClassName parseClassName]];
   [lquery fromPinWithName:@"LocalRecords"];
   BFTask *btask = [[lquery findObjectsInBackground] continueWithSuccessBlock:^id(BFTask *task) {
        if (task.error) {
            NSLog(@"Error: %@", task.error);
            return task;
        }
   }];

When I try to access any of the columns in classOne, classTwo, classThree and classFour I am getting an exception Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Key "name" has no data. Call fetchIfNeeded before getting its value.'

解决方案

This was a bug in the Parse.com local data store functionality for iOS.

From the 1.6.3 release notes:

"Improved consistency of Local Datastore / Parse queries with includeKey: and NSNull values."

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