Add a parse_response method to Model and Collection

[jaimegildesagredo]

I would like to divide the current parse(body, headers) method, which parses the http response and returns a dict with the model or collection values, into a parse_response(body, headers) method that only parses the response and returns a raw dict, and a parse(raw) method that receives the raw dict from parse_response and returns a new dict with the values for the model or collection.

See the example below:

class User(Model):
    name = StringField()
    age = IntegerField()

    def parse_response(self, body, headers):
        return json.loads(body)

    def parse(self, raw):
        return {
            'name': raw['fullName'],
            'age': int(raw['age'])
        }

Also, that way we could call the Model.parse method for each item when retrieving an entire collection.

[jaimegildesagredo]

I think I will start moving the parse(self, body, headers) method to an static method named parse_response to be called before creating a new model instance in the Collection's get and all methods.

class User(Model):

    @staticmethod
    def parse_response(body, headers):
        return json.loads(body)