Backbone model.save() is causing POST not PUT

Question

I have a Backbone model:

var User = Backbone.Model.extend({
  idAttribute: \'_id\',

  url: \'/api/user\',

  defaults:
    { username: \'\'
    }
});
         


        

Answer 1

Try checking user.isNew().

Looks like you created a new model which does not have an ID, that's why it's trying to add it during Backbone.sync.

UPDATE:

Above is exactly true. It does POST because it's a new model (which means, it does not have an id). Before you fetch a model, you need to give it an id. In your example:

var user = new User();
user.fetch();
user.save(); // in XHR console you see POST

var user = new User({ id: 123 });
user.fetch();
user.save(); // in XHR console you see PUT