RestKit：数据不可映射，除非`pattern`是'nil`

Question

我从以下网址加载数据：

https://myserver.com/api/kitchens/0af569e6-3e7d-4d6d-b8ca-7a70f93160c9/recipes/18488b51-04e0-4146-8ac6-05106db14024

数据如下：

{
  "recipe": {
    "id": "18488b51-04e0-4146-8ac6-05106db14024",
    "kitchen-id": "0af569e6-3e7d-4d6d-b8ca-7a70f93160c9",
    "rating": "",
    "title": "My recipe",
    "author": “John”,
    "date": "2014-05-10",
    "location": “Paris,
    "servings": 4,
    "customer-rating": 5.0,
    "ingredients": [

    ]
  }
}

我可以映射数据，这样我的映射就可以了。但是，只要我指定一个模式，我就不再获得任何数据映射。我的模式出了什么问题？

这里有一个比较：

PATTERN
/api/kitchens/:kitchenID/recipes/:recipeID
URL PATH
/api/kitchens/0af569e6-3e7d-4d6d-b8ca-7a70f93160c9/recipes/18488b51-04e0-4146-8ac6-05106db14024

我的映射代码

    RKEntityMapping *mapping = [RKEntityMapping mappingForEntityForName:@"Recipe" inManagedObjectStore:self.service.managedObjectStore];
NSDictionary *map = @{
                      @"id": @"id",
                      @"title": @"title",
                      @"rating": @"rating",
                      @"date": @"createdOn",
                      @"author": @"author",
                      @"servings": @"servings",
                      @"customer-rating": @"customerRating",
                      };
[mapping addAttributeMappingsFromDictionary:map];
result.identificationAttributes = @[@"id"];


// This does not work
    NSString *pattern = @"/api/kitchens/:kitchenID/recipes/:recipeID"

// This works
NSString *pattern = nil;

    RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:mapping method:RKRequestMethodAny pathPattern:pattern keyPath: @“recipe” statusCodes:statusCodes];