ios Restkit - 用另一個列表中的列表映射對象

Question

我試圖用Restkit映射對象。我沒有問題映射正常的JSON響應。在這種情況下，我有一個問題，因爲我要地圖這個配置的響應：

{ 
    "id": 161, 
    "text": "usertest", 
    "test": { 
     "id": "1", 
     "beginDate": "17/04/2013", 
     "expectedDuration": "45 minutes", 
     "finishDate": "17/04/2013", 
     "groups": [ 
      { 
       "id": 71, 
       "text": "some text", 
       "number":"number" 
      }, 
      { 
       "id": 81, 
       "text": "some anothertext 
      } 
     ] 
     ... 
} 

正如你所看到的，我有三個屬性（ID，文本和測試列表）主要對象。每個測試都有一些屬性（id，beginDate，...）。每個測試都有一個組列表。這是我的問題。當我嘗試映射這個時，restkit無法映射'組'列表。

我這個代碼映射這樣的：

//### TEST 
RKEntityMapping *testCompleteMapping = [RKEntityMapping mappingForEntityForName:@"UserTest" inManagedObjectStore:managedObjectStore]; 
[testCompleteMapping addAttributeMappingsFromDictionary:@{ 
@"id":    @"usertestID", 
}]; 

RKEntityMapping *usertest_TestMapping = [RKEntityMapping mappingForEntityForName:@"Test" inManagedObjectStore:managedObjectStore]; 
[usertest_TestMapping addAttributeMappingsFromDictionary:@{ 
@"id":    @"testID", 
@"beginDate":   @"beginDate", 
@"expectedDuration":@"expectedDuration", 
@"finishDate":   @"finishDate", 
}]; 

RKRelationshipMapping* usertest_Test_Relationship = [RKRelationshipMapping relationshipMappingFromKeyPath:@"test" toKeyPath:@"test" withMapping:usertest_TestMapping]; 

//### GROUPS 

RKEntityMapping *groupTestMapping = [RKEntityMapping mappingForEntityForName:@"QuestionGroup" inManagedObjectStore:managedObjectStore]; 
[groupTestMapping addAttributeMappingsFromDictionary:@{ 
@"id":    @"groupID", 
@"number":   @"number", 
@"text":@"text", 
}]; 

RKRelationshipMapping* group_Test_Relationship = [RKRelationshipMapping relationshipMappingFromKeyPath:@"groups" toKeyPath:@"groups" withMapping:usertest_TestMapping]; 


//### ADD PROPERTY MAPPINGS 

RKResponseDescriptor *CompleteTestResponseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:testCompleteMapping pathPattern:@"/api/module/demo2/lesson/Phasellus/test/71" keyPath:nil statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)]; 


[testCompleteMapping addPropertyMappingsFromArray:[NSArray arrayWithObjects:usertest_Test_Relationship, nil]]; 
[usertest_TestMapping addPropertyMapping:group_Test_Relationship]; 

[objectManager addResponseDescriptor:CompleteTestResponseDescriptor]; 

我還試圖用的，而不是「集團」，「test.groups」，但沒有奏效。

Answer 1

請嘗試下面的代碼。你的主要問題似乎是一個錯字（在group_Test_Relationship的定義中），你也缺少一些識別屬性（並非嚴格要求），但通常代碼是在正確的路徑上。

您沒有顯示您的testCompleteMapping的定義，因此您需要添加並檢查拼寫錯誤。

//### TEST 

RKEntityMapping *usertest_TestMapping = [RKEntityMapping mappingForEntityForName:@"Test" inManagedObjectStore:managedObjectStore]; 
[usertest_TestMapping addAttributeMappingsFromDictionary:@{ 
@"id": @"testID", 
@"beginDate": @"beginDate", 
@"expectedDuration": @"expectedDuration", 
@"finishDate": @"finishDate", 
}]; 
usertest_TestMapping.identificationAttributes = @[ @"testID" ]; 

//### GROUPS 

RKEntityMapping *groupTestMapping = [RKEntityMapping mappingForEntityForName:@"QuestionGroup" inManagedObjectStore:managedObjectStore]; 
[groupTestMapping addAttributeMappingsFromDictionary:@{ 
@"id": @"groupID", 
@"text": @"text", 
}]; 
groupTestMapping.identificationAttributes = @[ @"groupID" ]; 

[usertest_TestMapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"groups" toKeyPath:@"groups" withMapping:groupTestMapping]]; 


// complete your 'testCompleteMapping' here, adding the 'test' relationship property mapping to 'usertest_TestMapping' if required 


//### ADD PROPERTY MAPPINGS 

RKResponseDescriptor *completeTestResponseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:testCompleteMapping pathPattern:@"/api/module/demo2/lesson/Phasellus/test/71" keyPath:nil statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)]; 

[objectManager addResponseDescriptor:completeTestResponseDescriptor];