backbone.js parse 1 element (the Id)

For a id on a model in backbone, its just id and all lower cased. What if my Id on the server is called UserId. In the parse method for backbone, how do I change UserId to id and use the same names for all other properties?

For eg.

window.User = Backbone.Model.extend({
    defaults:
       {
           UserId: 0, // <--can i just tell backbone that this is my id?
           Name: '',
           Age: 0
       }
    parse: function(response){
           var model = response;
           model.id = response.UserId;
   开发者_运维问答        return model;
       }
});

Is there a better way to do this?

How about telling backbone model that my id is of type UserId.

You have to say Backbone what property is your id using the idAttribute in the model:

window.User = Backbone.Model.extend({
    idAttribute: "UserId",
    ...
})

and everything works fine :). Backbone will create a id property for you and collections of this model will get() by your UserId.

Do it like so:

parse: function(response) {
  var attrs = {};
  attrs.id = response.UserId;
  return attrs;
}

Parse has the responsibility to return an attributes hash, not a model. As such, you need only transform the response into an attributes hash versus a model as you are doing.

To set the id i would do as mauromartini says. To change any other property you don't need to create any private variables, response from the server is just an object so manipulate it and return it.

window.User = Backbone.Model.extend({
  defaults: { UserId: 0 },
  parse: function(response){
    response.id = response.UserId;
    return response;
  }
});

you could also add the following before you return the object if you want to keep the model clean:

delete response.UserId;