RestKit Request Mapping - Post Array of objects

Question

I am trying to serialize a SyncRewardDataRequestModel in my response body. "an_id" serializes fine. However, the SyncRewardDataInputModel objects within the NSArray always serializes to a empty NSArray. I have confirmed that I am passing a correct value in my NSArray - Does anyone see what is incorrect with my mapping?

Classes:

@interface SyncRewardDataInputModel : NSObject
@property (nonatomic,copy) NSNumber *test_id;
@end

@interface SyncRewardDataRequestModel : NSObject
@property (nonatomic,strong) NSArray *syncRewardDataInputs;
@property (nonatomic,copy) NSNumber *an_id;
@end

The following is my response descriptor:

     //Populate mapping
 RKObjectMapping *requestMapping = [RKObjectMapping requestMapping]; // objectClass == NSMutableDictionary
[requestMapping addAttributeMappingsFromDictionary:@{@"an_id": @"an_id"}];


RKObjectMapping *syncRewardDataInputsMapping = [RKObjectMapping mappingForClass:[SyncRewardDataInputModel class]];
[syncRewardDataInputsMapping addAttributeMappingsFromDictionary:@{@"test_id":   @"test_id"}];

//Combine
RKRelationshipMapping *arrayRelation = [RKRelationshipMapping relationshipMappingFromKeyPath:@"syncRewardDataInputs" toKeyPath:@"downloadCardResponseDTOs" withMapping:syncRewardDataInputsMapping];

[requestMapping addPropertyMapping:arrayRelation];

//Put it in a request
 RKRequestDescriptor *requestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:requestMapping objectClass:[SyncRewardDataRequestModel class] rootKeyPath:nil method:RKRequestMethodAny];

return requestDescriptor;

Wain · Accepted Answer · 2014-08-04 09:34:06Z

4

This line:

RKObjectMapping *syncRewardDataInputsMapping = [RKObjectMapping mappingForClass:[SyncRewardDataInputModel class]];

should be:

RKObjectMapping *syncRewardDataInputsMapping = [RKObjectMapping requestMapping];

because for a request you are always trying to map to an NSMutableDictionary so that JSON can be generated from it for transmission.

Often you will have a mapping used for the received data, linked to a response descriptor, and you can use inverseMapping on that to generate the mapping to be used for your request descriptor.

answered Aug 4, 2014 at 9:34

Wain

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2 Comments

Aziz Over a year ago

So I can make all my Mappings response mapping and then call inverse mapping if I want to use them as a request mapping?

Wain Over a year ago

Not everything can be reversed, but generally yes (standard nested mappings work well)

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