angularjs - AngularJS 中的条件验证

Question

仅当满足某些条件时，我才需要对表单字段应用验证。假设我有一个这样的表格:

<div ng-controller="MyController">
 <form name="myForm">
  <div>
   <div class="" ng-class="{error: myForm.gender.$invalid}">
    Gender:
   </div>
   Male   <input type="radio" name="gender" value="M" ng-model="survey.gender"   required/> 
   Female <input type="radio" name="gender" value="F" ng-model="survey.gender" required/> 
  </div>

  <div ng-show="survey.gender == 'F'">
   <div class="">
    Are you pregnant?
   </div>
   Yes <input type="radio" name="pregnant" value="Y" ng-model="survey.pregnant"/>
   No  <input type="radio" name="pregnant" value="N" ng-model="survey.pregnant"/>
  </div>
 </form>
</div>

我只想在用户选择女性性别时才需要怀孕问题。 Angular 是否为此提供任何类型的验证？

Answer 1

好吧，实际上我刚刚找到了执行此操作的指令。我只需要加ng-required="survey.gender == 'F'" .

代码现在看起来像这样:

<div ng-controller="MyController">
 <form name="myForm">
  <div>
   <div class="" ng-class="{error: myForm.gender.$invalid}">
    Gender:
   </div>
   Male   <input type="radio" name="gender" value="M" ng-model="survey.gender" required/> 
   Female <input type="radio" name="gender" value="F" ng-model="survey.gender" required/> 
  </div>

  <div ng-show="survey.gender == 'F'">
   <div class="">
    Are you pregnant?
   </div>
   Yes <input type="radio" name="pregnant" value="Y" ng-model="survey.pregnant" ng-required="survey.gender == 'F'">
   No  <input type="radio" name="pregnant" value="N" ng-model="survey.pregnant" ng-required="survey.gender == 'F'">
  </div>
 </form>
</div>