AngularJS select creates option with value “? object:null ?” and doesn't use empty default option when bound to null

Answer 1

Update 3/29/2017:

As Jorge Rodrigues dos Santos stated, this should be handled in a different way for newer versions of angular. Below is taken from the current documentation for angular 1.6.3

Optionally, a single hard-coded element, with the value set to an empty string, can be nested into the element. This element will then represent the null or "not selected" option. See example below for demonstration.

https://docs.angularjs.org/api/ng/directive/select

---

Angular is creating a new option to represent the null value. It didn't find one of the options you provided in the HTML.

To bind to null, set the value="null" on the first option

http://plnkr.co/edit/kzPVu4hiMcP6wA6crGYt?p=preview