Question

Posts.create({'body':post_body});

When I call that, Backbone will hit my sever with an AJAX post request, creating that post. My server will then return a JSON with the “full” post.

Perfect! But now, I want the newly created model to to have the full data. In other words, I don’t want it to only have the body attribute. (all my other models have other data).

My question is:

• will backbone automatically update the model with the “full” data because my server returned that full JSON?
• if not, how can I get Backbone to update that model so its data is full?

Edit: I did this, and it seems like Backbone automatically uses the data returned as the new model. Can someone confirm?

success:function(post){
    console.log(post.toJSON()); //Yay! latest version.
},

Answer 1

Yes, the model will be updated with any additional info your server returns.

This is because under the model’s create method, there is a call to save, which intern calls model.set within it, in order to update the model with any amended (or new attributes).

As the source code comment for this method states:

If the server returns an attributes hash that differs, the model’s state will be set again.