angularjs - ng自动选择angularjs中的值

Question

如果选项只有一个，我如何选择自动选择值

<select class="perf-select" ng-model="viewProfileCtrl.neft.institution"
   ng-options="inst.institution.institution_id as inst.institution.name for inst in viewProfileCtrl.perfiosAnalysisData.institutions"
   ng-change="viewProfileCtrl.setCurrNeftInsti(viewProfileCtrl.neft.institution, 'neftCredit')">
   <option value=""  selected>Select a Bank</option>
</select>

我的问题是如果我有多个选项它要求选择选项如果它只有一个它需要自动选择并显示值我如何解决这个问题

Answer 1

像这样试试。

var app = angular.module('anApp', []);
app.controller('aCtrl', function($scope) {

  $scope.chooses = [{"key":"one","value":1},{"key":"Two","value":2},{"key":"Three","value":3}];
  
   $scope.chooses2 = [{"key":"one","value":1}];
  $scope.setDefault = function(){
    if($scope.chooses.length ==1)
      $scope.model = $scope.chooses[0].value;
  }
  
    $scope.setDefault2 = function(){
    if($scope.chooses2.length ==1)
      $scope.model2 = $scope.chooses2[0].value;
  }
})

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="anApp" ng-controller="aCtrl">
    <select ng-init="setDefault()" ng-model="model" ng-options="k.value as k.key for  k in chooses">
     </select>
     
        <select ng-init="setDefault2()" ng-model="model2" ng-options="k.value as k.key for  k in chooses2">
     </select>
</div>