Backbone.js calling render after collection is populated

Question

I\'m trying to call render after fetch of a collection.

In my initialize method I have:

this.collection.bind(\'all\', this.render, this);
this.collection         


        

Answer 1

Looking at Backbone's Catalog of Events sounds like you want to listen to the reset event

Answer 2

The following should work:

this.collection.on('reset', this.render);
this.collection.fetch();

Normally in Backbone.js one would use on() to bind a callback to an object.

Answer 3

The following should definitely work, it worked for me...

instead of the below

this.collection.fetch();

use this

this.collection.fetch(async: false);

Answer 4

If you want to guarantee that data has been fetched before rendering it, then I'd suggest using jQuery's deferred object:

this.collection.deferred = this.collection.fetch();
self = this;
this.collection.deferred.done(function() {
    self.collection.render();
  }
);

Basically anything you put into the function you send to done will only be called after fetch is, well, done.

More on deferreds:

• http://lostechies.com/derickbailey/2012/02/07/rewriting-my-guaranteed-callbacks-code-with-jquery-deferred/
• http://www.erichynds.com/jquery/using-deferreds-in-jquery/