javascript - 在 angularjs 中提交时显示验证错误消息

Question

如果单击提交，我有一个表单需要显示验证错误消息。

这是一个工作的笨蛋

 <form name="frmRegister" ng-submit="register();" novalidate>
      <div>
        <input placeholder="First Name" name="first_name" type="text" ng-model="user.firstName" required />
        <span ng-show="frmRegister.first_name.$dirty && frmRegister.first_name.$error.required">First Name is required</span>
      </div>
      <div>
        <input placeholder="Last Name" name="last_name" type="text" ng-model="user.lastName" required />
        <span ng-show="frmRegister.last_name.$dirty && frmRegister.last_name.$error.required">Last Name is required</span>
      </div>
      <div>
        <input placeholder="Email" name="email" type="email" ng-model="user.email" required />
        <span ng-show="frmRegister.email.$dirty && frmRegister.email.$error.required">Email is required.</span>
        <span ng-show="frmRegister.email.$dirty && frmRegister.email.$error.email">Invalid Email address.</span>
      </div>
      <input type="submit" value="Save" />
      <span ng-show="registered">YOU ARE NOW REGISTERED USER</span>
 </form>

当用户开始进行更改时，验证正常工作。但它不会显示任何错误消息如果单击提交而不输入任何内容。

有没有想过实现这一目标？或者以其他方式如何在单击提交按钮时使每个输入字段 $dirty

Answer 1

我发现了这个小提琴http://jsfiddle.net/thomporter/ANxmv/2/它做了一个漂亮的技巧来导致控制验证。

基本上，它声明了一个范围成员submitted，并在您单击提交时将其设置为 true。模型错误绑定使用这个额外的表达式来显示错误消息，如

submitted && form.email.$error.required

---

更新

正如@Hafez的评论中所指出的（给他点赞！），Angular 1.3+ 的解决方案很简单：

form.$submitted && form.email.$error.required

Answer 2

由于我使用的是 Bootstrap 3，因此我使用了一个指令：（请参阅plunkr）

    var ValidSubmit = ['$parse', function ($parse) {
        return {
            compile: function compile(tElement, tAttrs, transclude) {
                return {
                    post: function postLink(scope, element, iAttrs, controller) {
                        var form = element.controller('form');
                        form.$submitted = false;
                        var fn = $parse(iAttrs.validSubmit);
                        element.on('submit', function(event) {
                            scope.$apply(function() {
                                element.addClass('ng-submitted');
                                form.$submitted = true;
                                if(form.$valid) {
                                    fn(scope, {$event:event});
                                }
                            });
                        });
                        scope.$watch(function() { return form.$valid}, function(isValid) {
                            if(form.$submitted == false) return;
                            if(isValid) {
                                element.removeClass('has-error').addClass('has-success');
                            } else {
                                element.removeClass('has-success');
                                element.addClass('has-error');
                            }
                        });
                    }
                }
            }
        }
    }]

    app.directive('validSubmit', ValidSubmit);

然后在我的 HTML 中：

<form class="form-horizontal" role="form" name="form" novalidate valid-submit="connect()">
  <div class="form-group">
    <div class="input-group col col-sm-11 col-sm-offset-1">
      <span class="input-group-addon input-large"><i class="glyphicon glyphicon-envelope"></i></span>
      <input class="input-large form-control" type="email" id="email" placeholder="Email" name="email" ng-model="email" required="required">
    </div>
    <p class="col-sm-offset-3 help-block error" ng-show="form.$submitted && form.email.$error.required">please enter your email</p>
    <p class="col-sm-offset-3 help-block error" ng-show="form.$submitted && form.email.$error.email">please enter a valid email</p>
  </div>
</form>

更新

在我最新的项目中，我使用Ionic，所以我有以下内容，它会自动将.valid或.invalid放在input-item's 上：

.directive('input', ['$timeout', function ($timeout) {
  function findParent(element, selector) {
    selector = selector || 'item';
    var parent = element.parent();
    while (parent && parent.length) {
      parent = angular.element(parent);
      if (parent.hasClass(selector)) {
        break;
      }
      parent = parent && parent.parent && parent.parent();
    }
    return parent;
  }

  return {
    restrict: 'E',
    require: ['?^ngModel', '^form'],
    priority: 1,
    link: function (scope, element, attrs, ctrls) {
      var ngModelCtrl = ctrls[0];
      var form = ctrls[1];

      if (!ngModelCtrl || form.$name !== 'form' || attrs.type === 'radio' || attrs.type === 'checkbox') {
        return;
      }

      function setValidClass() {
        var parent = findParent(element);
        if (parent && parent.toggleClass) {
          parent.addClass('validated');
          parent.toggleClass('valid', ngModelCtrl.$valid && (ngModelCtrl.$dirty || form.$submitted));
          parent.toggleClass('invalid', ngModelCtrl.$invalid && (ngModelCtrl.$dirty || form.$submitted));
          $timeout(angular.noop);
        }
      }

      scope.$watch(function () {
        return form.$submitted;
      }, function (b, a) {
        setValidClass();
      });


      var before = void 0;
      var update = function () {
        before = element.val().trim();
        ngModelCtrl.$setViewValue(before);
        ngModelCtrl.$render();
        setValidClass();
      };
      element
        .on('focus', function (e) {
          if (ngModelCtrl.$pristine) {
            element.removeClass('$blurred');
          }

        })
        .on('blur', function (e) {
          if (ngModelCtrl.$dirty) {
            setValidClass();
            element.addClass('$blurred');
          }
        }).on('change', function (e) {
          if (form.$submitted || element.hasClass('$blurred')) {
            setValidClass();
          }
        }).on('paste', function (e) {
          if (form.$submitted || element.hasClass('$blurred')) {
            setValidClass();
          }
        })
      ;

    }
  };
}])

然后在 HTML 中：

    <form name='form' novalidate="novalidate" ng-submit="auth.signin(form, vm)">
          <label class="item item-input item-floating-label">
            <span class="input-label">Email</span>
            <input type="email" placeholder="Email" ng-model="vm.email" autofocus="true" required
              >
          </label>
          <button ng-if="!posting" type="submit" class="item button-block item-balanced item-icon-right  call-to-action">Login<i class="icon ion-chevron-right"></i>
          </button>

在控制器中：

  self.signin = function (form, data) {
    if (!form.$valid) return;

    Authentication.emailLogin(data)
    //...

因此，现在，在 CSS 中，您可以执行以下操作：

.item.valid::before{
    float: right;
    font-family: "Ionicons";
    font-style: normal;
    font-weight: normal;
    font-variant: normal;
    text-transform: none;
    text-rendering: auto;
    line-height: 1;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    color: #66cc33;
    margin-right: 8px;
    font-size: 24px;
    content: "\f122";
}

.item.invalid::before{
    float: right;
    font-family: "Ionicons";
    font-style: normal;
    font-weight: normal;
    font-variant: normal;
    text-transform: none;
    text-rendering: auto;
    line-height: 1;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    color: #ef4e3a;
    margin-right: 8px;
    font-size: 24px;
    content: "\f12a";

/*
    border-left: solid 2px #ef4e3a !important;
    border-right: solid 2px #ef4e3a !important;
*/
}

简单得多！

Answer 3

我也有同样的问题，我通过添加一个 ng-submit 来解决这个问题，它将提交的变量设置为 true。

<form name="form" ng-submit="submitted = true" novalidate>
<div>
    <span ng-if="submitted && form.email.$error.email">invalid email address</span> 
    <span ng-if="submitted && form.email.$error.required">required</span>
    <label>email</label>
    <input type="email" name="email" ng-model="user.email" required>
</div>

<div>
    <span ng-if="submitted && form.name.$error.required">required</span>
    <label>name</label>
    <input type="text" name="name" ng-model="user.name" required>
</div>

<button ng-click="form.$valid && save(user)">Save</button>
</form>

我喜欢使用 $submitted 的想法，我想我必须将 Angular 升级到 1.3 ;)

Answer 4

我可以想出两种方法来实现它。

第一个是删除novalidate以启用浏览器的验证。

其次，您可以save像这样在表单无效时禁用按钮

<input ng-disabled="!frmRegister.$valid" type="submit" value="Save" />

希望能帮助到你。

Answer 5

有两种简单而优雅的方法可以做到这一点。

纯 CSS：

第一次提交表单后，尽管表单有效，Angular 还是会ng-submitted为刚刚提交的表单内的所有表单元素添加一个类。

我们可以.ng-submitted通过 CSS 来控制我们的元素。

如果您只想在用户提交时显示错误文本，例如

.error { display: none }
.ng-submitted .error {
     display: block;
}

使用 Scope 中的值：
第一次提交表单后，尽管表单有效，Angular 仍将设置[your form name].$submitted为 true。因此，我们可以使用该值来控制元素。

<div ng-show="yourFormName.$submitted">error message</div>
<form name="yourFormName"></form>

Answer 6

我的 bootstrap 3 解决方案

http://jsfiddle.net/rimian/epxrbzn9/

<form class="form" name="form" ng-app novalidate>
  <div class="form-group">
    <input name="first_name"
          type="text"
          class="form-control"
          ng-model="first_name"
          placeholder="First Name"
          required />
  </div>
  <div class="form-group">
    <input name="last_name"
          type="text"
          class="form-control"
          ng-model="last_name"
          placeholder="Last Name"
          required />
  </div>

  <button
    type="submit"
    class="btn btn-primary btn-large"
    ng-click="submitted=true">
      Submit
  </button>

<div ng-show="submitted && form.$invalid" class="alert alert-danger">
  <div ng-show="form.first_name.$error.required">
    First Name is Required
  </div>
  <div ng-show="form.last_name.$error.required">
    Last Name is Required
  </div>
</div>

</form>

Answer 7

您只需要在提交之前检查表单是否脏且有效。签出以下代码。

<form name="frmRegister" data-ng-submit="frmRegister.$valid && frmRegister.$dirty ? register() : return false;" novalidate>      

您还可以通过以下更改禁用提交按钮：

<input type="submit" value="Save" data-ng-disable="frmRegister.$invalid || !frmRegister.$dirty" />

这应该有助于您的初始

Answer 8

http://jsfiddle.net/LRD5x/30/ 一个简单的解决方案。

HTML

<form ng-submit="sendForm($event)" ng-class={submitted:submitted}>

JS

$scope.sendForm = function($event) {
  $event.preventDefault()
  $scope.submitted = true
};

CSS

.submitted input.ng-invalid:not(:focus) {
    background-color: #FA787E;
}

input.ng-invalid ~ .alert{
    display:none;
}
.submitted input.ng-invalid ~ .alert{
    display:block;
}

Answer 9

我最喜欢realcrowd的解决方案。

HTML：

<form role="form" id="form" name="form" autocomplete="off" novalidate rc-submit="signup()">
<div class="form-group" ng-class="{'has-error':  rc.form.hasError(form.firstName)}">
    <label for="firstName">Your First Name</label>
    <input type="text" id="firstName" name="firstName" class="form-control input-sm" placeholder="First Name" ng-maxlength="40" required="required" ng-model="owner.name.first"/>
    <div class="help-block" ng-show="rc.form.hasError(form.firstName)">{{rc.form.getErrMsg(form.firstName)}}</div>
</div>
</form>

javascript:

//define custom submit directive
var rcSubmitDirective = {
'rcSubmit': ['$parse', function ($parse) {
    return {
        restrict: 'A',
        require: ['rcSubmit', '?form'],
        controller: ['$scope', function ($scope) {
            this.attempted = false;

            var formController = null;

            this.setAttempted = function() {
                this.attempted = true;
            };

            this.setFormController = function(controller) {
              formController = controller;
            };

            this.hasError = function (fieldModelController) {
                if (!formController) return false;

                if (fieldModelController) {
                    return fieldModelController.$invalid && this.attempted;
                } else {
                    return formController && formController.$invalid && this.attempted;
                }
            };
            this.getErrMsg=function(ctrl){
                var e=ctrl.$error;
                var errMsg;
                if (e.required){
                    errMsg='Please enter a value';
                }
                return errMsg;
            }
        }],
        compile: function(cElement, cAttributes, transclude) {
            return {
                pre: function(scope, formElement, attributes, controllers) {

                    var submitController = controllers[0];
                    var formController = (controllers.length > 1) ? controllers[1] : null;

                    submitController.setFormController(formController);

                    scope.rc = scope.rc || {};
                    scope.rc[attributes.name] = submitController;
                },
                post: function(scope, formElement, attributes, controllers) {

                    var submitController = controllers[0];
                    var formController = (controllers.length > 1) ? controllers[1] : null;
                    var fn = $parse(attributes.rcSubmit);

                    formElement.bind('submit', function (event) {
                        submitController.setAttempted();
                        if (!scope.$$phase) scope.$apply();

                        if (!formController.$valid) return false;

                        scope.$apply(function() {
                            fn(scope, {$event:event});
                        });
                    });
                }
          };
        }
    };
}]
};
app.directive(rcSubmitDirective);

Answer 10

使用 angularjs 验证表单的完整解决方案。

HTML如下。

<div ng-app="areaApp" ng-controller="addCtrler">
        <form class="form-horizontal" name="fareainfo">
            <div class="form-group">
                  <label for="input-areaname" class="col-sm-2 control-label">Area Name : </label>
                  <div class="col-sm-4">
                      <input type="text" class="form-control" name="name" id="input-areaname" ng-model="Area.Name" placeholder="" required>
                      <span class="text-danger" ng-show="(fareainfo.$submitted || fareainfo.name.$dirty) && fareainfo.name.$error.required"> Field is required</span>
                  </div>
            </div>
             <div class="col-sm-12">
                  <button type="button" class="btn btn-primary pull-right" ng-click="submitAreaInfo()">Submit</button>
             </div>
        </form>
    </div>

AngularJS App和Controller如下

var areaApp = angular.module('areaApp', []); 
areaApp.controller('addCtrler', function ($scope) {
    $scope.submitAreaInfo = function () {  
       if ($scope.fareainfo.$valid) {
         //after Form is Valid
       } else {
          $scope.fareainfo.$setSubmitted();
       }
    };
});

---

重要的代码段

1. ng-app="areaApp" ng-controller="addCtrler"
   定义 Angular 应用和控制器

2. ng-show="(fareainfo.$submitted || fareainfo.name.$dirty) && fareainfo.name.$error.required"
   以上条件确保用户第一次看到表单时屏幕上没有任何验证错误，之后用户对表单进行更改以确保验证消息显示在屏幕上。。姓名。是输入元素的名称属性。

3. $scope.fareainfo.$valid
   上面的代码，当用户提交表单时，分段检查表单是否有效。

4. $scope.fareainfo.$setSubmitted();
   上面的代码，段确保当用户提交表单时，所有验证消息都显示在屏幕上，而无需执行任何操作。

Answer 11

// This worked for me.
<form  name="myForm" class="css-form" novalidate ng-submit="Save(myForm.$invalid)">
<input type="text" name="uName" ng-model="User.Name" required/>
<span ng-show="User.submitted && myForm.uName.$error.required">Name is required.</span>
<input ng-click="User.submitted=true" ng-disabled="User.submitted && tForm.$invalid" type="submit" value="Save" />
</form>
// in controller
$scope.Save(invalid)
{
if(invalid) return;
// save form
}

Answer 12

G45,

我遇到了同样的问题，我创建了一个指令，请检查下面希望它可能会有所帮助

指令：

    app.directive('formSubmitValidation', function () {

        return {
            require: 'form',
            compile: function (tElem, tAttr) {

                tElem.data('augmented', true);

                return function (scope, elem, attr, form) {
                    elem.on('submit', function ($event) {
                        scope.$broadcast('form:submit', form);

                        if (!form.$valid) {
                            $event.preventDefault();
                        }
                        scope.$apply(function () {
                            scope.submitted = true;
                        });


                    });
                }
            }
        };


  })

HTML：

<form  name="loginForm" class="c-form-login" action="" method="POST" novalidate="novalidate" form-submit-validation="">

<div class="form-group">
                                                <input type="email" class="form-control c-square c-theme input-lg" placeholder="Email" ng-model="_username" name="_username" required>
                                                <span class="glyphicon glyphicon-user form-control-feedback c-font-grey"></span>
                                                <span ng-show="submitted || loginForm._username.$dirty && loginForm._username.$invalid">
                                                    <span ng-show="loginForm._username.$invalid" class="error">Please enter a valid email.</span>
                                                </span>
                                            </div>
<button type="submit" class="pull-right btn btn-lg c-theme-btn c-btn-square c-btn-uppercase c-btn-bold">Login</button>
</form>

Answer 13

试试这个代码：

<INPUT TYPE="submit" VALUE="Save" onClick="validateTester()">

此功能将验证您的结果

function validateTester() {
    var flag = true
    var Tester = document.forms.Tester
    if (Tester.line1.value!="JavaScript") {
        alert("First box must say 'JavaScript'!")
        flag = false
        }
    if (Tester.line2.value!="Kit") {
        alert("Second box must say 'Kit'!")
        flag = false
        }
    if (flag) {
        alert("Form is valid! Submitting form...")
        document.forms.Tester.submit()
        }
    }