每当一个或另一个字段使用Angular指令更改模型(每次击键)时，验证密码并确认密码字段 [英] Validating Password And Confirm Password Fields Whenever One Or The Other Fields Model Changes (Each Keystroke) With Angular Directive

问题描述

我目前有一个Angular Directive，它可以验证密码并确认密码字段是否匹配.它可以工作到一定程度，如果密码不匹配，则确实会引发错误.但是，直到您在两个字段中都输入了数据，它才会引发错误.如何做到这一点，以便在一个字段或另一个字段中输入数据后立即引发密码不匹配的错误?

I currently have an Angular Directive that validates a password and confirm password field as matching. It works to a point, it does throw an error when the passwords do not match. However, it doesn't throw the error until you have entered data in both fields. How can I make it so the error for mismatched passwords is thrown as soon as you enter data in one field or the other?

这是指令(必须将其添加到两个需要匹配的字段中):

Here is the directive (it has to be added to both fields that need to match):

.directive('passwordVerify', function() {
   return {
      restrict: 'A', // only activate on element attribute
      require: '?ngModel', // get a hold of NgModelController
      link: function(scope, elem, attrs, ngModel) {
         //if (!ngModel) return; // do nothing if no ng-model

         // watch own value and re-validate on change
         scope.$watch(attrs.ngModel, function() {
            validate();
         });

         // observe the other value and re-validate on change
         attrs.$observe('passwordVerify', function(val) {
            validate();
         });

         var validate = function() {
            // values
            var val1 = ngModel.$viewValue;
            var val2 = attrs.passwordVerify;

           // set validity
           ngModel.$setValidity('passwordVerify', !val1 || !val2 || val1 === val2);
        };
      }
   };
});

这是我形式的指令:

<div class="small-5 columns">
    <div class="small-12 columns">
        <label>
            Password
            <input 
                ng-class="{ notvalid: submitted && add_user_form.user_password.$invalid }" 
                class="instructor-input" 
                id="user_password" 
                type="password" 
                name='user_password' 
                placeholder="password" 
                value='' 
                required 
                ng-model="user.user_password" 
                password-verify="[[user.confirm_password]]"
            >
        </label>
        <p class="help-text">
            <span class="   ">Required</span>
        </p>
        <div 
            class="help-block" 
            ng-messages="add_user_form.user_password.$error" 
            ng-show="add_user_form.user_password.$touched || add_user_form.user_password.$dirty"
        >
        <span class="red">
            <div ng-messages-include="/app/views/messages.html" ></div>
        </span>
    </div>
</div>
<div class="small-12 columns">
    <label>
        Confirm Password
        <input 
            ng-class="{ notvalid: submitted && add_user_form.confirm_password.$invalid }" 
            class="instructor-input" 
            id="confirm_password" 
            ng-model="user.confirm_password" 
            name="confirm_password" 
            type="password" 
            placeholder="confirm password" 
            name="user_confirm_passsword" 
            required 
            password-verify="[[user.user_password]]"
        >
    </label>
    <p class="help-text">
        <span class="   ">
            Enter matching password
        </span>
    </p>
    <div 
        class="help-block" 
        ng-messages="add_user_form.confirm_password.$error" 
        ng-show="add_user_form.confirm_password.$dirty || add_user_form.confirm_password.$touched "
    >
        <span class="red">
            <div 
                ng-messages-include="/app/views/messages.html"
            ></div>
        </span>
    </div>
</div>

推荐答案

只需更改最后一个检查:

Just change the last check:

ngModel.$setValidity('passwordVerify', !val1 || !val2 || val1 === val2);

收件人:

ngModel.$setValidity('passwordVerify', val1 === val2);

这是一个有效版本:

(function() {
  "use strict";
  angular
    .module('app', ['ngMessages'])
    .controller('mainCtrl', mainCtrl)
    .directive('passwordVerify', passwordVerify);

  function mainCtrl($scope) {
    // Some code
  }

  function passwordVerify() {
    return {
      restrict: 'A', // only activate on element attribute
      require: '?ngModel', // get a hold of NgModelController
      link: function(scope, elem, attrs, ngModel) {
        if (!ngModel) return; // do nothing if no ng-model

        // watch own value and re-validate on change
        scope.$watch(attrs.ngModel, function() {
          validate();
        });

        // observe the other value and re-validate on change
        attrs.$observe('passwordVerify', function(val) {
          validate();
        });

        var validate = function() {
          // values
          var val1 = ngModel.$viewValue;
          var val2 = attrs.passwordVerify;

          // set validity
          ngModel.$setValidity('passwordVerify', val1 === val2);
        };
      }
    }
  }
})();

<html ng-app="app">

<head>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.7/angular.min.js"></script>
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.6/css/bootstrap.min.css" />
  <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.6/js/bootstrap.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/angular-messages/1.5.7/angular-messages.min.js"></script>
</head>

<body ng-controller="mainCtrl">
  <form name="add_user_form">
    <div class="col-md-12">
      <div class="form-group" ng-class="{ 'has-error' : add_user_form.user_password.$dirty && add_user_form.user_password.$invalid }">
        <p class="help-text">Enter password</p>
        <input type="password" class="form-control" id="user_password" name="user_password" placeholder="password" required ng-model="user.user_password" password-verify="{{user.confirm_password}}">
        <div class="help-block" ng-messages="add_user_form.user_password.$error" ng-if="add_user_form.user_password.$dirty">
          <p ng-message="required">This field is required</p>
          <p ng-message="minlength">This field is too short</p>
          <p ng-message="maxlength">This field is too long</p>
          <p ng-message="required">This field is required</p>
          <p ng-message="passwordVerify">No match!</p>
        </div>
      </div>
      <div class="form-group" ng-class="{ 'has-error' : add_user_form.confirm_password.$dirty && add_user_form.confirm_password.$invalid }">
        <p class="help-text">Enter matching password</p>
        <input class="form-control" id="confirm_password" ng-model="user.confirm_password" name="confirm_password" type="password" placeholder="confirm password" required password-verify="{{user.user_password}}">
        <div class="help-block" ng-messages="add_user_form.confirm_password.$error" ng-if="add_user_form.confirm_password.$dirty">
          <p ng-message="required">This field is required</p>
          <p ng-message="minlength">This field is too short</p>
          <p ng-message="maxlength">This field is too long</p>
          <p ng-message="required">This field is required</p>
          <p ng-message="passwordVerify">No match!</p>
        </div>
      </div>
    </div>
  </form>
</body>

</html>

希望对您有帮助.

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