I couldn\'t find an elegant way for setting null values with a using AngularJS.
null
HTML :
This should work for you:
Controller:
function MyCntrl($scope) { $scope.obj ={"selected":null}; $scope.objects = [{id: 1, value: "Yes"}, {id: 0, value: "No"}] }
Template:
Unknown {{obj}}
Working plnkr
You should use ng-options with select.