I need to pass an id to a collection for use in the url (e.g. /user/1234/projects.json) but am not sure how to do this, an example would be wonderful.
The way my application is structured is on launch a collection of 'users' is pulled and rendered, I then want when a user is clicked their 'documents' are pulled from the server into a new collection and rendered in a new view. The issue is getting the user id into the documents collection to give the relevant URL for the documents.fetch().
think I've got it, here is an example:
//in the the view initialize function
this.collection = new Docs();
this.collection.project_id = this.options.project_id;
this.collection.fetch();
//in the collection
url: function() {
return '/project/api/' +this.project_id+'/docs';
}
Your user collection url should be set to /user. Once that's set, your models should utilize that url in order to do their magic. I believe (not completely positive) that if a model is in a collection, calling the 'url' method will return /user/:id. So all your typical REST-ish functionality will be utilized on '/user/:id'. If you are trying to do something with a relationship (a user has many documents) it's kind of rinse and repeat. So, for your documents collection (which belogs to user correct?) you'd set the url to 'user_instance.url/documents'.
To show a one to many relationship with a backbone model, you'd do something like this (upgrade to backbone 0.5.1 for urlRoot):
var User = Backbone.Model.extend({
initialize: function() {
// note, you are passing the function url. This is important if you are
// creating a new user that's not been sync'd to the server yet. If you
// did something like: {user_url: this.url()} it wouldn't contain the id
// yet... and any sync through docs would fail... even if you sync'd the
// user model!
this.docs = new Docs([], {user_url: this.url});
},
urlRoot: '/user'
});
var Doc = Backbone.Model.extend();
var Docs = Backbone.Collection.extend({
initialize: function(models, args) {
this.url = function() { args.user_url() + '/documents'; };
}
});
var user = new User([{id: 1234}]);
user.docs.fetch({ success: function() { alert('win') });
Why do you need to override the URL property of the collection with a function?.. you could do:
this.collection = new Docs();
this.collection.project_id = this.options.project_id;
this.collection.url = '/project/api/' + this.options.project_id + '/docs';
this.collection.fetch();
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