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

The server response must be in this way:

{
  _id : 111
}

Because you set _id as the primary key. When model is fetched verify the value of _id it must have a value: console.log( model.get('_id') );

My thought is that you set in your backbone model '_id' as primary key, but service is returning you 'id'

Update: Adding sample code of normal behavior:

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

  url: '/api/user',

  defaults:
    { username: ''
    }
});
user = new UserModel({_id : 20});
user.save();
user = new UserModel();
user.save();

Output: PUT /api/user 405 (Method Not Allowed) POST /api/user 404 (Not Found)

Check how the first instance of the Model has an id and it tries to do the PUT but the other POST. I cannot reproduce your issue, so my thought is that the problem is on your server response.