角度清除子表单数据和重置验证

Question

我正在尝试使用 Angular.js 创建一个子表单 <div ng-form="vacancyForm">

有一种数据有很多字段

• 标题
• 可用日期
• 价格

所有人都有required 验证。

一旦我提交了该数据，我将用它做我需要的事情，但我想重置子表单，以便所有字段都不脏，并且表单在清除字段时有效，但所有字段都是无效，因为它们现在很脏，但为空，将它们标记为无效。

示例字段

<div class="control-group" ng-class="getErrorClasses(vacancyForm.headline)">
     <label class="control-label" for="headline">Headline</label>
     <div class="controls">
         <input type="text" class="input-xlarge" id="headline" name="headline" required ng-model="new_vacancy.headline">
         <span class="help-inline" ng-show="showError(vacancyForm.headline, 'required')">This field is required</span>
      </div>
</div>

这里是提交时调用的函数

 $scope.addVacancy = function(){

        // save the submitted data
        $scope.school.vacancies.push($scope.new_vacancy);

        // now clear it out
        $scope.new_vacancy = {};
        $scope.new_vacancy.date = new Date();

        // this clears out all the fields and makes them all invalid 
        // as they are empty. how to reset the form???

    }

Answer 1

在子窗体上设置name 属性，然后您可以$scope.formName.$setPristine(); 其中formName 是name 属性。值更改后，元素不再是原始的。

http://docs.angularjs.org/api/ng.directive:form.FormController#$setPristine

更新
上述答案仅适用于 1.2，但在 1.3 angular 中引入了“触摸”输入的概念。现在，当元素模糊时，角度会将字段标记为已触摸。与$setPristine类似，您可以使用$scope.formName.$setUntouched()设置回输入。

https://docs.angularjs.org/api/ng/type/form.FormController#$setUntouched

touched vs pristine：touched 表示该字段已被模糊，而 pristine 表示该字段的值已被修改。 Angular 的文档指出，“在将表单设置回原始状态时，将表单控件设置回未触及状态通常很有用。”

编辑
这是一个小提琴演示：https://jsfiddle.net/TheSharpieOne/a30kdtmo/

angular.module('myApp', [])
  .controller('myCtrl', myCtrl);

function myCtrl() {
  var vm = this;
  vm.reset = function() {
    vm.myForm.$setPristine();
    vm.myForm.$setUntouched();
    vm.email = vm.password = '';
  }
}

.ng-invalid.ng-touched {
  outline: 2px solid blue;
}
.ng-invalid.ng-dirty {
  outline: 2px solid red;
}
.ng-invalid.ng-dirty.ng-untouched {
  outline: 2px solid green;
}
form,
form div {
  padding: 5px 10px;
}
h3,
h4 {
  margin-bottom: 0;
}

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.0/angular.min.js"></script>
<div ng-app="myApp" ng-controller="myCtrl as ctrl">
  <form name="ctrl.myForm">
    <div>
      <label for="email">Email</label>
      <input name="myInput" type="email" ng-model="ctrl.email" id="email" required>
    </div>
    <div>
      <label for="password">Password</label>
      <input name="myPassword" type="password" minlength="8" ng-model="ctrl.password" id="password" required>
    </div>
    <div>
      <button ng-click="ctrl.reset()" type="button">Reset</button>
    </div>
  </form>
  <div>
    <h4>Form Level</h4>
    <div>$dirty: {{ctrl.myForm.$dirty}}</div>
    <div>$pristine: {{ctrl.myForm.$pristine}}</div>
    <h4>Input Level</h4>
    <h5>Email Input</h5>
    <div>$dirty: {{ctrl.myForm.myInput.$dirty}}</div>
    <div>$pristine: {{ctrl.myForm.myInput.$pristine}}</div>
    <div>$touched: {{ctrl.myForm.myInput.$touched}}</div>
    <h5>Password Input</h5>
    <div>$dirty: {{ctrl.myForm.myPassword.$dirty}}</div>
    <div>$pristine: {{ctrl.myForm.myPassword.$pristine}}</div>
    <div>$touched: {{ctrl.myForm.myPassword.$touched}}</div>
  </div>
  <div>
    <h3>Color outlines for input</h3>
    <div title="The form loads this way, it can still be invalid since required fields are empty to start with">untouched, pristine: no outline</div>
    <div title="Such as in the middle of typing a valid email for the first time">invalid, untouched, dirty: green outline</div>
    <div title="blurred with invalid input">invalid, touched, dirty: red outline</div>
    <div title="focued and blurred without typing">invalid, touched: blue outline</div>
  </div>
</div>