RestKit mapping with NSDictionary and NSArray object - ios

Question

{"coord":{"lon":72.62,"lat":23.03},"weather":[{"id":500,"main":"Rain","description":"light rain","icon":"10n"}],"base":"stations","main":{"temp":303.082,"pressure":1014.85,"humidity":66,"temp_min":303.082,"temp_max":303.082,"sea_level":1018.46,"grnd_level":1014.85},"wind":{"speed":1.07,"deg":340.501},"rain":{"3h":0.435},"clouds":{"all":76},"dt":1475333911,"sys":{"message":0.0033,"country":"IN","sunrise":1475283682,"sunset":1475326567},"id":1279233,"name":"Ahmadabad","cod":200}
Above is my API response.
Now I want to mapping of "weather" and "name" and want the same object as a response.
I can create to class
#interface WeatherStatus : NSObject
#property (nonatomic, copy) NSString *name;
#property (nonatomic, strong) WeatherInfo *info;
#end
and
#interface WeatherInfo : NSObject
#property (nonatomic, copy) NSString *description;
#property (nonatomic, copy) NSString *icon;
Below is mapping code.
RKObjectMapping *weatherInfo = [RKObjectMapping mappingForClass:[WeatherInfo class]];
[weatherInfo addAttributeMappingsFromDictionary:#{#"description": #"description", #"icon": #"icon"}];
RKObjectMapping *weatherStatus = [RKObjectMapping mappingForClass:[WeatherStatus class]];
[weatherStatus addAttributeMappingsFromArray:#[#"name"]];
[weatherStatus addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:#"weather" toKeyPath:#"weather" withMapping:weatherInfo]];
RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:weatherStatus method:RKRequestMethodGET pathPattern:nil keyPath:#"weather" statusCodes:nil];
[objectManager addResponseDescriptor:responseDescriptor];
NSDictionary *queryParams;
queryParams = [NSDictionary dictionaryWithObjectsAndKeys:kAPP_KEY, #"appid", #"Ahmedabad", #"q", nil];
[[RKObjectManager sharedManager] getObjectsAtPath:#"/data/2.5/weather" parameters:queryParams success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
WeatherStatus *obj = [mappingResult.array objectAtIndex:0];
NSLog(#"info %#",obj.info);
NSLog(#"name %#",obj.name);
} failure:^(RKObjectRequestOperation *operation, NSError *error) {
NSLog(#"What do you mean by 'there is no coffee?': %#", error);
}];
I am getting
info (null)
name (null)
Can anyone let me know where is the mistake?
I have already seen RestKit complex and simple JSON RKObjectMapping almost working, but

Answer 1

Don't use description as a property name, it'll only cause you problems. Use overview or something similar instead.
In the JSON, the weather is an array, so you should make your weather (info) property a NSArray, and be sure the name in the mapping and the property match.

Answer 2

I change the property of info object in "WeatherStatus" class to NSArray.
#property (nonatomic, copy) NSString *name;
#property (nonatomic, strong) NSArray *weather;
Here is the modification of mapping code.
RKObjectMapping *venueMapping = [RKObjectMapping mappingForClass:[WeatherStatus class]];
[venueMapping addAttributeMappingsFromDictionary:#{#"name": #"name"}];
RKObjectMapping *locationMapping = [RKObjectMapping mappingForClass:[WeatherInfo class]];
[locationMapping addAttributeMappingsFromDictionary:#{#"description": #"description",#"icon":#"icon"}];
[venueMapping addRelationshipMappingWithSourceKeyPath:#"weather" mapping:locationMapping];
RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:venueMapping method:RKRequestMethodGET pathPattern:nil keyPath:nil statusCodes:nil];
[objectManager addResponseDescriptor:responseDescriptor];
Add relationship mapping with WeatherStatus class.
Credit goes to https://stackoverflow.com/users/1988185/wain