How in the backbone to know that the fetch of the model was successful (event)?

Question

JavaScript

There is a note model and a to_paste collection.
It is necessary to make sure that after filling the note model, the filling of the to_paste collection begins, because in to_paste I want to pass some parameters from note.
How to define an event when fetch is successful?
Filling them one by one (note.fetch(); to_paste.fetch();) and using fields doesn't work due to asynchronous loading.
Below is the code, as I did (several attachments to success), but it doesn't work.

note.fetch({
  success: function (collection, note1) {
        var noteView = new Memo.Views.FullNote( {model: note}, {flag: 1 } );
        var to_paste = new Memo.Collections.NotebookList();	
        to_paste.fetch({  
             success: function (collection) {
          var notebooks_to_paste = new Memo.Views.NotebookListToDelete( {collection: to_paste} );
          var notebook_id = note.get("notebook_id");	
          $('.example').html(notebooks_to_paste.render().el);	
        }
      });
      $('.content').html(noteView.render().el);
    }
  });

Answer 1

backbonejs.org/#Events-catalog
"sync" (model_or_collection, resp, options) - when the model or collection has been successfully synced to the server.
in your case, working with promises is better
if jQuery is connected, fetchreturnsjQuery.Deferred