Angularjs：如何在使用ng-option时在select中包含空选项

Question

How can I add empty option in the beginning when I use ng-option to provide predefined list of options which doesn't include empty one?

An example in jade

select(ng-model="property.Value", ng-options="item.Value as item.Name for item in property.Choices")

Answer 1

Just add an option with empty value inside of the select.

select(ng-model="property.Value", ng-options="item.Value as item.Name for item in property.Choices")
  option(value="")

Here's an example - http://jsfiddle.net/sseletskyy/uky9m/1/

Answer 2

just modify the property.choices array in angular.

$scope.property.Choices.splice(0, 0, {"id":"0","Name":"Richard"});

Answer 3

This just worked for me by modifying the object

angular.extend({'Please Select' : ''},objectName)