Test example for https://github.com/RestKit/RestKit/issues/1286

test.m

#import "test.h"

#import "RestKit/RestKit.h"

@interface Root : NSObject
@property (nonatomic, strong) NSArray *users;
@property (nonatomic, strong) NSString *text;
@end
@implementation Root
- (NSString*)description {
	return [NSString stringWithFormat:@"Root {users:%@, test:%@}",
		_users, _text];
}
@end

@interface User : NSObject
@property (nonatomic, strong) NSString *name;
@end
@implementation User
- (NSString*)description {
	return [NSString stringWithFormat:@"User {name:%@}", _name];
}
@end

static RKObjectManager *manager;

@implementation Test

+ (void)test
{
	[Test setupMapper];
	[Test retrieveJSON];
}

+ (void)setupMapper
{
	manager = [RKObjectManager managerWithBaseURL:[NSURL
		URLWithString:@"http://dl.dropbox.com/u/145894/rk/"]];
	[RKMIMETypeSerialization registerClass:[RKNSJSONSerialization class]
		forMIMEType:@"text/plain"];

	RKObjectMapping *rootMapping = [RKObjectMapping mappingForClass:[Root class]];
	[rootMapping addAttributeMappingsFromDictionary:@{@"extra": @"text"}];

	RKObjectMapping *userMapping = [RKObjectMapping mappingForClass:[User class]];
	[userMapping addAttributeMappingsFromDictionary:@{@"name": @"name"}];
	[rootMapping addPropertyMapping:[RKRelationshipMapping
		relationshipMappingFromKeyPath:@"users" toKeyPath:@"users"
		withMapping:userMapping]];

	[manager addResponseDescriptor:[RKResponseDescriptor
		responseDescriptorWithMapping:rootMapping
		pathPattern:@"root" keyPath:nil
		statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)]];
}

+ (void)retrieveJSON
{
	RKObjectRequestOperation *operation = [manager
		appropriateObjectRequestOperationWithObject:nil
		method:RKRequestMethodGET path:@"root" parameters:nil];
	[operation setCompletionBlockWithSuccess:
		^(RKObjectRequestOperation *operation, RKMappingResult *result) {
			NSData *data = operation.HTTPRequestOperation.responseData;
			NSLog(@"Got root %@", [result firstObject]);
			[Test parseJson:data];
			} failure:nil];
	[manager enqueueObjectRequestOperation:operation];
	NSLog(@"Query requested...");
}

+ (void)parseJson:(NSData*)input
{
	NSLog(@"Trying to reparse JSON...");
	NSError *error;
	id parsedData = [RKMIMETypeSerialization objectFromData:input
		MIMEType:@"application/json" error:&error];
	NSLog(@"Got %@", parsedData);
	if ([parsedData count] < 1 || error) {
		//deal with error
		abort();
	}

	RKObjectMapping *mapping = [manager.responseDescriptors[0] mapping];
	NSLog(@"Trying to use mapping %@", mapping);
	NSDictionary *mappingsDictionary = @{ [NSNull null]: mapping };
	RKMapperOperation *mapper = [[RKMapperOperation alloc]
		initWithRepresentation:parsedData
		mappingsDictionary:mappingsDictionary];

	BOOL isMapped = [mapper execute:&error];
	if (isMapped && !error) {
		NSLog(@"Yay, mapping got %@", [mapper.mappingResult firstObject]);
	} else {
		NSLog(@"Didn't get anything?");
	}
	NSLog(@"Finished");
}

@end