AngularJS：根据ngModel未使用ngRepeat选择单选按钮

Question

默认情况下，不会根据模型值检查单选按钮。

angular.module('app', [])
  .controller('MyCtrl', ($scope) => {
  $scope.decideVote ={
    vote: {
     yes: "Yes",
      no: "No",
     maybe: "Maybe"
	  //if i have more values here, i will get more radio buttons 
    } 
  }
  
   //uncomment for testing. 
   $scope.serverVoted= {
   vote: {yes:"Yes"}
   }
 });

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular.min.js"></script>
<div ng-app="app" ng-controller="MyCtrl">
	<form name="myForm">
		<p>Select Vote</p>
		<ul>
			<li ng-repeat="i in decideVote.vote">
				<label>
            {{i}}
					<input type="radio"  name="same"
                    ng-model="serverVoted.vote" ng-value="i" />
				</label>  
			</li>
		</ul>
	</form>
	<div>

如angularjs docs中所述，应根据模型值自动检查无线电。我会在这里粘贴工作样本，但实际情况是这样的。

组件定义为radioButtonsFromJsonObj，可以有许多元素作为radioButtonsFromJsonObj，并且可能使用不同的Json对象来填充单选按钮，但模型对于特定的单选按钮组是相同的。

但是当我再次打开页面并且模型具有正确的值时，单选按钮不会按照模型进行检查。

此外，实际场景就像生成模板的组件，并且传递绑定以便为每个元素动态获取ngModel.ngModel设置正确但是当尝试重新打开并从服务器读取数据时，它不会自动检查。所以尝试在上面创建相同的场景。内部组件具有init块和构造函数块，只需创建$ ctrl变量。

绑定如下

bindings: {
  model: '=ngModel'
}

在模板中有ngRepeat并在每个迭代中生成这样的模板。

 <input type="radio"  name="same"  ng-model="$ctrl.model" ng-value="i" />

主HTML可以有很多元素。

<radioButtonsFromJsonObj ng-model="request.Voting1"> </radioButtonsFromJsonObj >
<radioButtonsFromJsonObj ng-model="request.Voting2"> </radioButtonsFromJsonObj >

Answer 1

serverVoted.vote是对象，所以用这个ng-model =“serverVoted.vote.yes”替换

angular.module('app', [])
  .controller('MyCtrl', ($scope) => {
  $scope.decideVote ={
    vote: {
     yes: "Yes",
      no: "No",
     maybe: "Maybe"
	  //if i have more values here, i will get more radio buttons 
    } 
  }
  
   //uncomment for testing. 
   $scope.serverVoted= {
   vote: {yes:"Yes"}
   }
 });

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular.min.js"></script>
<div ng-app="app" ng-controller="MyCtrl">
	<form name="myForm">
		<p>Select Vote</p>
		<ul>
			<li ng-repeat="i in decideVote.vote">
				<label>
            {{i}}
					<input type="radio"  name="same"  ng-model="serverVoted.vote.yes" ng-value="i" />
				</label>  
			</li>
		</ul>
	</form>
	<div>

Answer 2

错误

$scope.serverVoted= {
   vote: {yes:"Yes"}
}

代替：

 $scope.server = { vote: "Yes" };

DEMO

angular.module('app', [])
  .controller('MyCtrl', ($scope) => {
  $scope.decideVote ={
    vote: {
     yes: "Yes",
      no: "No",
     maybe: "Maybe"
	  //if i have more values here, i will get more radio buttons 
    } 
  }
  
   //uncomment for testing. 
   $scope.serverVoted= {vote: "Yes"};
})

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular.min.js"></script>
<div ng-app="app" ng-controller="MyCtrl">
	<form name="myForm">
		<p>Select Vote</p>
		<ul>
			<li ng-repeat="i in decideVote.vote">
				<label>
            {{i}}
					<input type="radio"  name="same"
                    ng-model="serverVoted.vote" ng-value="i" />
				</label>  
			</li>
		</ul>
	</form>
	<div>