Javascript 角度选择不工作
控制器Javascript 角度选择不工作,javascript,angularjs,Javascript,Angularjs,控制器 $scope.formData = {}; $scope.formData.cars = {}; $scope.formData.cars.list = [ { id: 1, name: 'vw 2'}, { id: 2, name: 'vw 1'} ]; $scope.formData.cars.selected = $scope.formData.cars.list[0]; html 有人能解释为什么这会添加第三个空白元素以及为什么第一个属性(vw 2)不是默认
$scope.formData = {};
$scope.formData.cars = {};
$scope.formData.cars.list = [
{ id: 1, name: 'vw 2'},
{ id: 2, name: 'vw 1'}
];
$scope.formData.cars.selected = $scope.formData.cars.list[0];
html
有人能解释为什么这会添加第三个空白元素以及为什么第一个属性(
vw 2
)不是默认值吗?您不应该使用对象来设置所选值,因为您使用的是汽车的值“id”
因此,请这样做:
$scope.formData = {};
$scope.formData.cars = {};
$scope.formData.cars.list = [
{ id: 1, name: 'vw 2'},
{ id: 2, name: 'vw 1'}
];
$scope.formData.cars.selected = $scope.formData.cars.list[1].id;
<select id="bookingCars" class="form-control" ng-model="formData.cars.selected" ng-options="car.id as car.name for car in formData.cars.list">
$scope.formData={};
$scope.formData.cars={};
$scope.formData.cars.list=[
{id:1,名称:'vw 2'},
{id:2,名称:'vw 1'}
];
$scope.formData.cars.selected=$scope.formData.cars.list[1].id;
如果要使用整个对象作为值,以下操作将起作用:
{{formData.cars.selected}} - {{formData.cars.selected.id}}
<select id="bookingCars" class="form-control" ng-model="formData.cars.selected"
ng-options="c.name for c in formData.cars.list">
{{formData.cars.selected}-{{formData.cars.selected.id}
试试这个:
ng-options="car as car.name for car in formData.cars.list"
而且它应该是有效的
您正在使用表单中的ngOption
作为数组中值的标签。说:
选择:此表达式的结果将绑定到的模型
父元素。如果未指定,将选择表达式
默认为值
这意味着您希望您的select
零件成为一个对象,但是您提供了一个字符串car.code
ng-options="car as car.name for car in formData.cars.list"