地幔忽略JSON中的键(Mantle ignore key in JSON)

地幔忽略JSON中的键(Mantle ignore key in JSON)

在创建我的地幔模型时，我一直试图忽略字典中的一个键。 让我们说json包含：

{ prop1:"my prop", prop2:"my prop2" }

最初我有一个模特

class MyModel: MTLModel, MTLJSONSerializing { //MARK: Model properties var prop1: String! class func JSONKeyPathsByPropertyKey() -> [NSObject : AnyObject]! { return ["prop1":"prop1"] } }

问题是我得到一个错误，说“这个类不是密钥值编码兼容的关键prop2”。

我还注意到，在使用字典初始化模型时，不会调用JSONKeyPathsByPropertyKey方法try! super.init(dictionary: dictionaryValue, error: ()) try! super.init(dictionary: dictionaryValue, error: ()) ，仅在从模型生成JSON时强制属性具有与JSON相同的密钥。 我之所以能够忽略某些密钥，是因为后端服务可能会发生变化，而且我不一定要推出更新，因为一些额外的信息已被添加到呼叫中，或者因为它们完全无关紧要。

I've been trying to ignore a key inside a dictionary when creating my mantle model. Let's say that the json contains:

{ prop1:"my prop", prop2:"my prop2" }

initially I have a model with

class MyModel: MTLModel, MTLJSONSerializing { //MARK: Model properties var prop1: String! class func JSONKeyPathsByPropertyKey() -> [NSObject : AnyObject]! { return ["prop1":"prop1"] } }

The problem is that I get an error saying " this class is not key value coding-compliant for the key prop2".

I also noticed that the JSONKeyPathsByPropertyKey method is not called when initialising the model with a dictionary try! super.init(dictionary: dictionaryValue, error: ()), only when generating JSON from the model forcing the properties to have the same key as the JSON. The reason why I want to be able to ignore certain keys is because the backend service might change and I don't necessarily HAVE to roll an update because some extra info has been added to the call or because they simply are completely irrelevant.

最满意答案

事实证明我没有使用MTLJSONAdapter ，而是在做一个init(dictionary: dictionaryValue, error: ()) 。 正确的方法是使用MTLJSONAdapter.modelOfClass(MyClass.self, fromJSONDictionary: aDictionary, error: ()); 这样就实际上使用了JSONKeyPathsByPropertyKey方法。

Turns out I wasn't using the MTLJSONAdapter, instead I was doing an init(dictionary: dictionaryValue, error: ()). The correct way is to use MTLJSONAdapter.modelOfClass(MyClass.self, fromJSONDictionary: aDictionary, error: ()); this way the JSONKeyPathsByPropertyKey method is in fact used.