AngularJS-选择带有ajax源的空选项 [英] AngularJS - Empty option in select with ajax source

问题描述

我有一个select元素，其中应该填充一些我需要从API调用中检索的选项，然后将第一个选项设置为selected.

I have a select element that should be filled with some options that I need to retrieve from an API call, then set the first one as selected.

但是Angular在第一个位置创建了一个空选项，我不知道如何删除它.

But Angular creates an empty option at first position and I don't know how to delete it.

这是我的代码:

HTML

<select class="form-control" ng-model="selectedPositionFamily">
    <option ng-repeat="pf in positionFamilies" ng-value="pf.uuid">{{pf.name}}</option>
</select>

控制器

function Controller($scope, PositionFamilyService) {

    $scope.positionFamilies = [];

    $scope.selectedPositionFamily = "";

    initController();

    function initController() {

        PositionFamilyService.getAll({ 'sort' : 'order,asc' })
            .then(function(data){
                $scope.positionFamilies = data.content;
                $scope.selectedPositionFamily = $scope.positionFamilies[0].uuid;                        
            });
    }
}

推荐答案

使用ng-options可以实现相同的目的

Same thing can be achieved using ng-options

html

<select ng-model="selectedPositionFamily" 
ng-options="pf.uuid as pf.name for pf in positionFamilies"></select>

js

$scope.positionFamilies = [{uuid:1, name:"val1"},
{uuid:2, name:"val2"},{uuid:3, name:"val3"}];
$scope.selectedPositionFamily = $scope.positionFamilies[0].uuid;

https://jsfiddle.net/mxno5esv/

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