Question

我似乎在将一组Core Data对象发布到服务器时遇到了一些问题。 RestKit使得GET请求变得非常容易，但是当发布时并没有那么多。

这是服务器想要JSON的方式

{
   "myThingList":[
      {
       "id":"0",
       "code":"8406014415007DC8",
       "timestamp":"2012-05-11-12.30.15.505000",
       "status":"0",
       "userId":"8000000",

      }
  ]
}

我在Core Data中有一个THING类，最多可容纳200个东西。我需要立即将所有这些发送到服务器。当然，我从CD中获取的NSArray只是一个东西的数组。

以下是我的代码。我得到[valueForUndefinedKey：]：这个类不是密钥值编码兼容的密钥theId。'

RKManagedObjectMapping *thingMapping = [ RKManagedObjectMapping mappingForClass:[thingMapping class] 
                                                                      inManagedObjectStore:self.objectManager.objectStore ];
[thingMapping mapKeyPath:@"id" toAttribute:@"theId"];
[thingMapping mapKeyPath:@"code" toAttribute:@"code"];
...... the rest of the fields in Thing

[self.objectManager.mappingProvider setMapping:thingMapping forKeyPath:@"myThingList"];

attendReadMapping.primaryKeyAttribute = @"theId";


[self.objectManager.mappingProvider setSerializationMapping:[thingMapping inverseMapping] forClass:[Things class]];

//now, we create mapping for the MySyncEntity
RKObjectMapping *syncEntityMapping = [RKObjectMapping mappingForClass:[MySyncEntity class]];
[syncEntityMapping mapKeyPath:@"mySyncArray" toRelationship:@"mySyncArray" withMapping:thingMapping];
[[self.objectManager mappingProvider] setSerializationMapping:[syncEntityMapping inverseMapping]
                                          forClass:[MySyncEntity class]];




MySyncEntity *mySyncInstance = [[MySyncEntity alloc] init];
mySyncInstance.mySyncArray = things;


NSString *url = [NSString stringWithFormat:@"things];

if ( [things count] > 0 ) {
    [self.objectManager sendObject:mySyncInstance toResourcePath:url usingBlock:^(RKObjectLoader* postLoader) {
        postLoader.delegate = aDelegate;
        postLoader.method = RKRequestMethodPOST;
        postLoader.userData = @"howdy";
        postLoader.serializationMIMEType = RKMIMETypeJSON; 
        [postLoader setUsername:[prefs objectForKey:@"me"]];
        [postLoader setPassword:[prefs objectForKey:@"me"]];


        postLoader.targetObject = nil;  // Map the results back onto a new object instead of self
}]}};

Answer 1

发现了这个问题。以下需要更改

** OLD **
 [syncEntityMapping mapKeyPath:@"mySyncArray" toRelationship:@"mySyncArray" withMapping:thingMapping];


** NOW **
[syncEntityMapping mapKeyPath:@"myThingList" toRelationship:@"myThingList" withMapping:thingMapping];

MySyncEntity类还需要将其NSArray Prop更改为同名“myThingList”而不是“mySyncArray”

也是这个

mySyncInstance.mySyncArray = things;

需要

mySyncInstance.myThingList = things;

Restkit：从Core Data提取到服务器的POST对象数组

1 个答案: