Angularjs: How to include empty option in select when using ng-option

问题

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")

回答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/

回答2:

just modify the property.choices array in angular.

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

回答3:

This just worked for me by modifying the object

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

来源：https://stackoverflow.com/questions/15650315/angularjs-how-to-include-empty-option-in-select-when-using-ng-option