javascript - Backbone models and URL exceptions -

i have backbone model called user has urlroot of /api/users. thus, if create new model id of 5, url /api/users/5.

i have implemented endpoint individual user's twitter friends. endpoint /api/users/:id/twitter-friends

do need create new collection url, , manually set id, or can somehow create method on model make request , return new collection instance (of user's twitter friends). example:

var user = new user({ id: 5 }) user.findtwitterfriends() // returns collection of users 

or, make unique collection data of sort:

var user = new user({ id: 5 })  var users = new users() users.url = user.url() + '/find-friends/twitter' // /api/users/5/find-friends/twitter users.fetch() 

what best practice dealing urls in way? there better way? have similar needs other uses, such api endpoint can users username @ /api/users/username/:username. having manually set urlroot:

var user = new user({ username: username }) user.urlroot = user.urlroot + '/username/' + username user.fetch() 

perhaps should design urls differently? i'm open suggestions.

from experience best way override backbone.sync, in model.

looking @ backbone model.fetch! can see takes [options] . top of head would cleaner way. override backbone sync user, , let backbone handle getusers.

/* method redundant.i added show can add options go.  */  getusers : function() {     this.fetch({         action = 'getusers';     }); }    getuser : function(username) {     this.fetch({         action = 'getsingleuser'.         username = username;     }); },  sync : function(method, model, options) {          if(method === 'read'){             if(options.action === 'getsingleuser') {                                 this.url = '/username/' + options.username;                             }             else this.url = '/find-friends/twitter';             ret = backbone.sync.apply(this, arguments);             return ret;         }         else{             return backbone.sync.call(this, method, this, options);         } }