New Elements in Array Are Shown at the Bottom and Go to the Top After a Short Delay

sortCreatedAtDesc: ['createdAt:desc'],
notesSorted: Ember.computed.sort('notes', 'sortCreatedAtDesc')

...and they are displayed in a view like this:

Problem

Solution

Apparently, it happened because the new note was shown before the information came back from the server. CreatedAt property is set on the backend, so during a short time - when waiting for the backend response - it has the value of null and is placed on the bottom of the page.

The solution to this problem is to sort only the saved notes, omitting those with isNew property.

In model:

sortCreatedAtDesc: ['createdAt:desc'],
notesSaved: Ember.computed.filterBy('notes', 'isNew', false),
notesSorted: Ember.computed.sort('notesSaved', 'sortCreatedAtDesc'),

Keep in mind that there will be a short delay between clicking "Save" and displaying a new note on the list because of it. Therefore, you should consider making UI changes accordingly. For example, you may disable the "Save" button or display the "Note is saving..." message to the user.

Here's an exemplary use of isSaving in save action:

saveNote: function() {
 this.set('isSaving', true);
 //...
 note.save().then(() => {
   this.set('isSaving', false);
 }
 this.set("noteBody", "");
}