Angular 提交验证

Question

我正在尝试创建一个表单，如果您未填写任何字段，则在您点击提交时会显示一条警告消息。我正在尝试使用 angular 验证来实现这一点；但是，它根本不起作用。这是我目前拥有的代码：

(1) HTML 活动表格文件

  function mainController($scope, $http) {
      $scope.formData = {};

      $http.get('/api/events')
        .success(function(data) {
          $scope.events = data;
          initMap(data);
          for(i = 0; i < data.length; i++){
            console.log(data[i].eventLocation);
            //placeMarker(data[i]);
            //test(data);
          }
          //placeMarker(data);
        })
        .error(function(data) {
          console.log('Error: ' + data);
        });

      // when submitting the add form, send the text to the node API
      $scope.createEvent = function() {
        $http.post('/api/events', $scope.formData)
          .success(function(data) {
            $scope.formData = {}; // clear the form so our user is ready to enter another
            $scope.events = data;
            console.log(data);
          })
          .error(function(data) {
            console.log('Error: ' + data);
          });
        }

      // ATTEMPT AT FORM VALIDATION
      $scope.validateForm = function() {
        if (document.getElementById("inputName").value == "" || document.getElementById("inputType").value == "" || document.getElementById("inputLocation").value == "" || document.getElementById("inputDetails").value == "") {
          alert("Please fill in all required fields!");
          return false;
        }
      }
    };

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div class="col-lg-6">
                  <!-- Validate form -->
                  <form name="myForm" onsubmit="return validateForm()">
                   <div class="form-group">
                      
                      <label>Event Name</label>
                      <input type="text" name="inputName" class="form-control" ng-model="formData.eventName" placeholder="Event name">
                    </div>

                     <div class="form-group">
                       <label>Type</label>
                       <select class="form-control" id="inputType" ng-model="formData.eventType">
                         <option>Option 1</option>
                         <option>Option 2</option>
                         <option>Option 3</option>
                         <option>Option 4</option>
                       </select>
                     </div>

                     <div class="form-group">
                       <label>Location</label>
                       <select class="form-control" id="inputLocation" ng-model="formData.eventLocation">
                         <option>Location 1</option>
                         <option>Location 2</option>
                         <option>Location 3</option>
                       </select>
                     </div>

                     <div class="form-group">
                       <label>Event Details</label>
                       <textarea class="form-control" name="inputDetails" ng-model="formData.eventDetails" rows="2" placeholder="Add details about your event"></textarea>
                     </div>
                    <div class="text-center">
                      <button id="add-event"type="submit" class="btn btn-primary"  ng-click="createEvent()">Submit</button>
                    </div>
                  </form>

Answer 1

做angularjs方式。 https://scotch.io/tutorials/angularjs-form-validation

angular.module('exApp', [])
.controller('ctrl', ['$scope', function($scope) {
  $scope.save = function(invalid){
  if(!invalid){console.log('Form Submitted');}
  }
}]);

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<body ng-app="exApp" ng-controller="ctrl">
<div>
  <form name="form" class="css-form" novalidate>
    <label>Name:
      <input type="text" ng-model="name" name="userName" required="" />
    </label>
    <br />
    <div ng-show="form.$submitted || form.userName.$touched">
      <div ng-show="form.userName.$error.required">Tell us your name.</div>
    </div>

    <label>E-mail:
      <input type="email" ng-model="email" name="userEmail" required="" />
    </label>
    <br />
    <div ng-show="form.$submitted || form.userEmail.$touched">
      <span ng-show="form.userEmail.$error.required">Tell us your email.</span>
      <span ng-show="form.userEmail.$error.email">This is not a valid email.</span>
    </div>

    Gender:
    <label><input type="radio" ng-model="gender" value="male" />male</label>
    <label><input type="radio" ng-model="gender" value="female" />female</label>
    <br />
    <label>
    <input type="checkbox" ng-model="agree" name="userAgree" required="" />

    I agree:
    </label>
    <input ng-show="agree" type="text" ng-model="agreeMe" required="" />
    <br />
    <div ng-show="form.$submitted || form.userAgree.$touched">
      <div ng-show="!agree || !agreeMe">Please agree and sign.</div>
    </div>

    <input type="button" value="Reset" />
    <input type="submit" value="Save" ng-disabled="form.$invalid || form.$pristine" ng-click="save(form.$invalid)" />
  </form>
</div>

Answer 2

您可以使用 ng-submit 进行表单验证

<form name="myForm" ng-submit="validateForm()">

并且为了验证使用 ng-model 变量来验证表单

$scope.validateForm = function() { 
    if (!$scope.formData.eventName || !$scope.formData.eventType  ) {
      alert("Please fill in all required fields!");
      return false;

  }

Demo

Answer 3

Angular 在使用表单时提供了一些帮助。它为表单提供不同的对象。他们在验证表单时非常有帮助：

$pristine：true，如果用户尚未与表单交互
$dirty：如果用户与表单进行了交互，则为真
$valid：true，如果所有控件都有效
$invalid：true，如果至少有一个控件无效
$错误：它包含对所有无效控件的引用

您可以通过表单对象使用此对象，在您的例子中是 myForm。所以你可以检查用户是否填写了任何字段：

$scope.validateForm = function(myForm) {
  if(myForm.$pristine) {
    alert("Please fill in all required fields!");
  }
}

Answer 4

试试这个：

将 ng-submit 添加到具有 myForm.$valid 条件的元素中。
在提交按钮上添加一个 ng-click="submitted=true" 事件，该事件将在单击提交按钮时触发。
在所有输入字段或必填字段中添加 required 属性。

演示版

var myApp = angular.module('myApp',[]);

myApp.controller('MyCtrl', function($scope) {
    $scope.validateForm = function() {
      alert("submitting");
    };
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myApp" ng-controller="MyCtrl">
  <form name="myForm" ng-submit="myForm.$valid && validateForm()" novalidate>
  <p ng-show="submitted==true && myForm.inputName.$invalid">Event name is missing.</p>
  <p ng-show="submitted==true && myForm.inputType.$invalid">Event type is missing.</p>
  <p ng-show="submitted==true && myForm.inputLocation.$invalid">Event Location is missing.</p>
  <p ng-show="submitted==true && myForm.inputDetails.$invalid">Event details is missing.</p>
               <div class="form-group">
                  <label>Event Name</label>
                  <input type="text" name="inputName" class="form-control" ng-model="formData.eventName" required placeholder="Event name">
                </div>

                 <div class="form-group">
                   <label>Type</label>
                   <select class="form-control" name="inputType" id="inputType" ng-model="formData.eventType" required>
                     <option>Option 1</option>
                     <option>Option 2</option>
                     <option>Option 3</option>
                     <option>Option 4</option>
                   </select>
                 </div>

                 <div class="form-group">
                   <label>Location</label>
                   <select class="form-control" name="inputLocation" id="inputLocation" ng-model="formData.eventLocation" required>
                     <option>Location 1</option>
                     <option>Location 2</option>
                     <option>Location 3</option>
                   </select>
                 </div>

                 <div class="form-group">
                   <label>Event Details</label>
                   <textarea class="form-control" name="inputDetails" ng-model="formData.eventDetails" rows="2" placeholder="Add details about your event" required></textarea>
                 </div>
                <div class="text-center">
                  <button id="add-event"type="submit" class="btn btn-primary" ng-click="submitted=true">Submit</button>
                </div>
              </form>
</div>

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