扩展Backbone模型保存

Question

What is the best way to extend the model.save method ?

I need to add new methods to post same data to backend. ie: played method should request (by POST) to apiurl/model/:id/played

eg:

var Game = Backbone.Model.Extend({
   baseUrl: '/games/',
   played: function(){
      this.url = this.baseUrl + this.id + '/played' 
      this.save();
   }
}); 

var game = new Game({id:3234});  //is only an example, instances are created before previuosly
game.played();

This way is working but the request is a GET. In addition, it would be perfect if this save() did not send all the attributes in the request.

Adding information: As I have to interact with cross domain api, I've extended the sync method in order to work with JSONP. Moreover, I've added some security instructions.

//backbone sync
Backbone._sync = Backbone.sync;
Backbone.sync = function(method, model, options) {
    //network
    options.timeout = 10000;
    options.dataType = "jsonp";  
    //security
    if(_conf.general.accessToken){
        var ak = _conf.general.accessToken, 
        url = model.url,
        linker = url.indexOf('?') === -1 ? '?':'&';
        model.url = url + linker + 'accessToken=' + ak+'&callback=';    
    }
    //error manager
    var originalError = options.error || function(){};
    options.error = function(res){
        originalError(res.status, $.parseJSON(res.responseText));
    };
    //call original Method 
    Backbone._sync(method, model, options);  
};

Answer 1

Backbone's save and fetch methods just make calls to the Backbone.sync method, which in turn is just a wrapper for an ajax call. you can pass in ajax parameters using the save function without having to actually extend it. basically ends up being something like this:

game.save({attributes you want to save}, {type:'POST', url: 'apiurl/model/:id/played'});

You would have to do this every time though so it is probably better practice to extend Backbone.sync for your model.

The Backbone website has a bit of information about what I'm talking about as far as the Backbone sync and save taking ajax options. There are also a few examples I've seen on extending sync but I can't seem to track them down at the moment.