Angular Tips: ng-options does not work

When binding a select with ng-options, even though I had data in the array, the select wasn't populated.

The code I used was standard, from angular point of view:

<select 
    ng-options="choice.ID as choice.Name for choice in Choice.Options">
</select>

 The problem was that I did not bound the model to the select. So after changing the code to add a model, it worked fine:

<select 
    ng-model="Choice.Selection"
    ng-options="choice.ID as choice.Name for choice in Choice.Options">
</select>