angular $validators 没有开火或行为不端

Question

(function() {
 'use strict';
 angular.module('peoplePickerCombo', []);
 angular.module('peoplePickerCombo')
  .directive('peoplePicker', function() {
   return {
    restrict: 'E'
    ,require: 'ngModel'
    ,scope : {
      ngDisabled    : '=?'
     ,placeholder   : '@'
     ,secondaryPlaceholder : '@'
     ,users     : '=ngModel'
     ,maxChips    : '@'
     ,minChips    : '@'
     ,service    : '&'
     ,required    : '@'
    }
    //,templateUrl : './resources/module/combo/people-picker/people-picker.template.html'
    ,template : '<div class="md-chip-container md-block" ng-class="{there : !users.length}" flex>\
        <label ng-if="!!users.length">{{placeholder}}</label>\
        <md-chips\
         readonly="ngDisabled || readonly"\
         aria-label="{{placeholder}}"\
         class="custom-chips"\
         secondary-placeholder="{{secondaryPlaceholder}}"\
         md-max-chips="{{maxChips}}"\
         ng-model="users"\
         md-autocomplete-snap\
         md-require-match="true"\
         md-separator-keys="[13,186]">\
          <md-autocomplete\
           md-menu-class="md-contact-chips-suggestions"\
           md-selected-item="selectedUser"\
           md-search-text="searchText"\
           md-items="item in comboCtrl.userLookupService(searchText)"\
           md-item-text="comboCtrl.itemText(item)"\
           md-no-cache="true"\
           ng-disabled="ngDisabled || (users.length==maxChips)"\
           md-floating-label="{{users.length ? (users.length==maxChips?\'\':secondaryPlaceholder) : placeholder}}"\
           md-autoselect>\
            <div class="md-contact-suggestion">\
             <!-- <img ng-init="getPic(item)"\
            ng-src="{{item.Picture}}"\
            alt="{{item.DisplayName}}"\
             /> -->\
             <span\
              class="md-contact-name"\
              md-highlight-text="userSearchText"\
              md-highlight-flags="ig">\
               {{item.DisplayName}}\
             </span>\
             <span class="md-contact-email">{{item.Email}}</span>\
            </div>\
          </md-autocomplete>\
          <md-chip-template>\
           <div class="md-contact-avatar">\
            <img data-ng-src="{{$chip.PictureURL}}" />\
           </div>\
           <div class="md-contact-name">{{$chip.DisplayName}}</div>\
          </md-chip-template>\
          <button md-chip-remove class="md-primary rchip">\
           <!--<md-icon md-font-set="material-icons"> close </md-icon>-->x\
          </button>\
        </md-chips>\
       </div>'
    //,replace : true
    ,link: function(scope, element, attrs, ctrl) {
     //debugger;
     scope.users = scope.users || [];
     //scope.userLookupService
     
     //scope[attrs.ngModel] = scope.users;
     
     if (angular.isDefined(attrs.ngDisabled) ) {
                     scope.$watch('ngDisabled', function(isDisabled) {
                         scope.ngDisabled = isDisabled;
                     });
                 }
     
     /*ctrl.$validators.atleast = function(modelValue,viewValue) {
           console.log(modelValue , viewValue)
           return !!(modelValue && modelValue.length>0);
          };
     
     scope.$watch('users.length',function(newVal,oldVal){
      ctrl.$validate();
              });*/



     //If provided with an array of user ids, Guess by string
     if(scope.users && scope.users.length){
      var s = scope.service();
      angular.forEach(scope.users,function(obj,idx){
       if(angular.isNumber(obj)){
        s(obj).then(function(r){
         scope.users[idx] = r[0];
        });
       }
      });
     }
     
    }
    ,controller : ['$scope', '$timeout', '$q', function($scope, $timeout, $q){
     var vm = this;

     vm.itemText = function(item){
      return item.DisplayName;
     };


     vm.userLookupService = $scope.service();
     
     //If provided with an array of nbk ids, Guess by string
     if($scope.users && $scope.users.length){
      angular.forEach($scope.users,function(obj,idx){
       if(angular.isString(obj)){
        vm.userLookupService(obj).then(function(r){
         $timeout(function(){
          $scope.users[idx] = r[0];
         });
        });
       }
      });
     }
    }]
    ,controllerAs : 'comboCtrl'
   };
  });
 
 angular.module('peoplePickerCombo')
  .directive('required', function() {
         return {
             restrict: "A",
             require: 'ngModel',
             link: function(scope, element, attrs, ctrl) {
              if (!ctrl) {
               return false;
          }
          ctrl.$validators.required = function(modelValue,viewValue) {
           //console.log(modelValue , viewValue)
           return !!( modelValue && modelValue.length>0 );
          };
             }
         }
     });
 
})();

/* Styles go here */

/*people-picker*/

people-picker md-autocomplete md-autocomplete-wrap md-progress-linear {
  bottom: -12px !important;
}
people-picker md-input-container {
  bottom: 10px !important;
  min-width: 400px !important;
}
people-picker md-chip {
  position: relative !important;
  padding: 0 20px 0 1px !important;
  box-shadow: 1px 1px 1px #888;
}
people-picker .customMessages {
  color: rgb(221, 44, 0);
  font-size: 12px;
  overflow: hidden;
  -webkit-transition: all .3s cubic-bezier(.55, 0, .55, .2);
  transition: all .3s cubic-bezier(.55, 0, .55, .2);
  opacity: 1;
  margin-top: 0;
  padding-top: 5px;
}
people-picker .md-chips md-chip .md-contact-avatar {
  float: left;
}
people-picker .md-chips md-chip .md-contact-avatar img {
  height: 32px;
  border-radius: 16px;
}
people-picker .md-chips md-chip .md-contact-name {
  padding: 0 5px;
}
people-picker md-chip .md-chip-remove-container {
  position: absolute !important;
  right: 4px !important;
  top: 4px;
  margin-right: 0;
  height: 24px;
}
people-picker md-chip .md-chip-remove-container button.rchip {
  position: relative;
  height: 24px;
  width: 24px;
  line-height: 20px;
  text-align: center;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 50%;
  border: none;
  box-shadow: none;
  padding: 0;
  margin: 0;
  transition: background 0.15s linear;
  display: block;
}
people-picker md-chip .md-chip-remove-container button.rchip md-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate3d(-50%, -50%, 0) scale(0.7);
  color: white;
  fill: white;
}
people-picker md-chip .md-chip-remove-container button.rchip:hover,
people-picker md-chip ._md-chip-remove-container button.rchip:focus {
  background: rgba(255, 0, 0, 0.8);
}
people-picker md-chip md-chip-template {
  /*padding-right: 4px;*/
  display: -ms-inline-flexbox;
  display: -webkit-inline-flex;
  display: inline-flex;
}
people-picker > .md-chip-container > label {
  font-size: 14px;
  color: rgba(0, 0, 0, 0.38);
  /*label which is shown when user is selected | Not Secondary Placeholder*/
}
people-picker md-input-container label {
  font-size: 14px;
  /*placeholder and secondary placeholder*/
}
people-picker[required] .md-chip-container.there > label::after,
people-picker[required] .md-chip-container.there md-input-container label::after {
  content: ' *';
  font-size: 13px;
  vertical-align: top;
}
/* Not using this one
people-picker .md-chip-container md-chips-wrap::before{
 overflow: hidden;
 text-overflow: ellipsis;
 white-space: nowrap;
 width: 90%;
 -webkit-order: 1;
 -ms-flex-order: 1;
 order: 1;
 pointer-events: none;
 -webkit-font-smoothing: antialiased;
 padding-left: 0px;
 padding-right: 0;
 z-index: 1;
 -webkit-transform: translate3d(0,28px,0) scale(1);
 transform: translate3d(0,28px,0) scale(1);
 transition: -webkit-transform .4s cubic-bezier(.25,.8,.25,1);
 transition: transform .4s cubic-bezier(.25,.8,.25,1);
 max-width: 100%;
 -webkit-transform-origin: left top;
 transform-origin: left top;
 position:absolute;
 color: rgba(0,0,0,0.38);
 content : attr(label);
 font-size:15px;
}

people-picker .md-chip-container md-chips-wrap.md-focused::before
,people-picker .md-chip-container md-chips.ng-dirty md-chips-wrap::before
,people-picker .md-chip-container md-chips.ng-not-empty md-chips-wrap::before{
 -webkit-transform: translate3d(0,-108px,0) scale(.80);
 transform: translate3d(0,-108px,0) scale(.80);
 transition: -webkit-transform cubic-bezier(.25,.8,.25,1) .4s,width cubic-bezier(.25,.8,.25,1) .4s;
 transition: transform cubic-bezier(.25,.8,.25,1) .4s,width cubic-bezier(.25,.8,.25,1) .4s;
}

people-picker .md-chip-container md-chips-wrap.md-focused::before{
 color:rgb(63,81,181);
}

people-picker .md-chip-container md-chips-wrap.md-readonly::before{
 -webkit-transform: translate3d(0,-11px,0) scale(1);
 transform: translate3d(0,-11px,0) scale(1);
}*/

people-picker .md-chip-container md-chips-wrap.md-readonly {
  box-shadow: none;
  border-bottom: 1px dotted #CCC;
}

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,400,500,700,400italic" />
  <link rel="stylesheet" href="https://cdn.gitcdn.link/cdn/angular/bower-material/v1.1.1/angular-material.css" />

</head>

<body>
  <div ng-app="app" ng-cloak>
    <form novalidate name="pForm" ng-controller="MainCtrl as ctrl">
      <md-content layout-padding>
        <div style="background: #abcdef;">
          This one doesn't throw error on empty even when required directive and $validator is programmed, Why
        </div>
        <div>
          <people-picker required name="user" ng-disabled="false" service="ctrl.userLookupService" max-chips="10" placeholder="User" secondary-placeholder="Add Another?" ng-model="ctrl.users" aria-label="Users"></people-picker>
          <div ng-messages="pForm.user.$error" class="customMessages">
            <div ng-message="required">User is required</div>
            <div ng-message="resolve">One or more users have not been resolved</div>
          </div>
        </div>
        <div>&nbsp;</div>
        <div>&nbsp;</div>
        <div style="background: #abcdef;">
          Below one (Title) throws error on blur if empty | Error Goes away if valid | works even with keystrokes
        </div>
        <div>
          <md-input-container class="md-block" flex>
            <input type="text" placeholder="Title" aria-label="Title" required name="title" ng-model="ctrl.Title">
            <div ng-messages="pForm.title.$error">
              <div ng-message="required">Title is required</div>
            </div>
          </md-input-container>
        </div>
        <div>
          <md-button type="submit">Submit</md-button>
        </div>
      </md-content>
    </form>
  </div>
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular.js"></script>
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular-animate.min.js"></script>
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular-route.min.js"></script>
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular-aria.min.js"></script>
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular-messages.min.js"></script>
  <script src="https://cdn.gitcdn.link/cdn/angular/bower-material/v1.1.1/angular-material.js"></script>
  <!--<script src="people-picker.directive.js"></script>-->
  <script>
    (function() {
      'use strict';
      angular.module('app', ['peoplePickerCombo', 'ngMaterial', 'ngMessages']);
      angular.module('app')
        .controller('MainCtrl', ['$scope', '$timeout', '$q',
          function($scope, $timeout, $q) {
            var vm = this;
            vm.users = [34, 89, 55];

            //Simulate a service
            vm.userLookupService = function(q) {
              var d = $q.defer();
              //debugger;
              $timeout(function() {
                var list = ["Beast BoyChangeling", "Phantom Stranger", "Vril Dox", "The Shade", "Robotman", "Captain Atom", "Elongated Man", "Amanda Waller", "Green Lantern", "Adam Strange", "Deadman", "Atom", "Nightwing", "Demeain Dark", "Elijah Snow", "Sandman", "Cyborg", "Ra’s Al Ghul", "Raven", "Hitman", "Jimmy Olsen", "Dr. Mahhattan", "Midnighter", "Lobo", "Alfred Pennyworth", "Brainiac 5", "Static", "Big Barda", "Catman", "The Riddler", "Doctor Fate", "Wildcat", "Black Adam", "Two-Face", "Mister Miracle", "Green Lantern", "Plastic Man", "Firestorm", "Starfire", "Batgirl", "Red HoodRobin", "Bigby Wolf", "Poison Ivy", "SpeedyArsenalRed Arrow", "Jonah Hex", "Yorick Brown", "Spectre", "Green Lantern", "Deathstroke", "Commisioner James Gordon", "Death", "Spider Jerusalem", "The Question", "Lois Lane", "Blue Beetle", "Flash", "Deadshot", "Supergirl", "Question", "Jesse Custer", "Huntress", "Animal Man", "Donna Troy", "Sinestro", "ImpulseKid Flash", "Harley Quinn", "Batwoman", "Batgirl", "Hawkman", "Darkseid", "Starman", "Zatanna", "Blue Beetle", "Sandman", "Catwoman", "Swamp Thing", "Captain Marvel", "Green Lantern", "Martian Manhunter", "Aquaman", "Rorschach", "Black Canary", "Power Girl", "Superboy", "John Constantine", "Lex Luthor", "Robin", "Booster Gold", "Green Lantern", "Green Arrow", "Barbara Gordon", "Flash", "Tim Drake", "Wonder Woman", "Flash", "Green Lantern", "Joker", "Dick Grayson", "Superman", "Batman"];
                list = list.map(function(a, i) {
                  return {
                    UserName: i,
                    DisplayName: a,
                    Email: a.replace(/[^\w]/gi, '').toLowerCase() + '@dccomics.com',
                    PictureURL: 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAMAAADXqc3KAAAAdVBMVEX///8AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA268pkAAAAJnRSTlMAAAICBAgMFhwmKjA4QFJUWFxeYm6Zm6urrbvBx8/X2dvf3+/9/fI9ls0AAACsSURBVCiRbdDZDoMgEAXQcau7uCsuoFX5/08stlACcp8m9yRkBgCZEq8rLsGMP7FvJt+Alom0eu8eEg5Xg4j9E2mQK8g1QAqQBqmCVIPgkv0V6Gv1EnrjjlDse4Tm6Qm9e5qYPcCr6rrqZZRuvY3xPcTjVqvTHUT4KyfBmJx8IMgRq87MyPxbuTV78cXe/oTd41A8e8YKDosNFoDM1jOWwWCHAYgdCDT0bQltPkJILs0IxHsZAAAAAElFTkSuQmCC'
                  }
                });
                var r = new RegExp(q, 'ig');
                var response;
                if (angular.isNumber(q)) {
                  response = [list[q]];
                } else response = (list.filter(function(a) {
                  return r.test(a.DisplayName);
                }).slice(0, 10));
                d.resolve(response);
              }, 100);
              return d.promise;
            };

          }
        ]);
    }());
  </script>
</body>

</html>

在 Plunkr 中添加：https://plnkr.co/edit/1LgFCNqT0YDkyUAaC31C 和上面提供的代码片段。

上面的页面代码段中描述了一些问题。

Description: The directive people-pickcer brings in users as we search in the md-autocomplete tag and when something is selected it transforms to an md-chip 并添加到 parent md-chips 中。移除所有筹码后，它应该会抛出验证错误 <div ng-message="required">User is required</div>。

用法：

<div>
   <people-picker 
        required name="user" ng-disabled="false" service="ctrl.userLookupService" 
        max-chips="5" placeholder="User" secondary-placeholder="Add Another?" 
        ng-model="ctrl.users" aria-label="Users"></people-picker>
   <div ng-messages="pForm.user.$error" class="customMessages">
       <div ng-message="required">User is required</div>
       <div ng-message="resolve">One or more users have not been resolved</div>
    </div>
</div>

问题： 如果您看到 Title 输入框，无论何时用无效输入模糊都会引发错误。我尝试为我的模块编写一个 $validators 但它从未触发，当我删除任何 md-chip 时它也会触发所有验证（我认为它会在删除任何芯片时尝试提交表单）。尝试在不触摸标题输入框的情况下删除 md-chip，您会看到针对标题触发了验证器，如果有更多带验证的输入字段，如果我从选择中删除任何 md-chip，则会触发所有验证器。

required 来自我模块的指令

angular.module('peoplePickerCombo')
    .directive('required', function() {
        return {
            restrict: "A",
            require: 'ngModel',
            link: function(scope, element, attrs, ctrl) {
                if (!ctrl) {
                    return false;
                }
                ctrl.$validators.required = function(modelValue,viewValue) {
                    //console.log(modelValue , viewValue)
                    return !!( modelValue && modelValue.length>0 );
                };
            }
        }
    });

预期它会在删除所有 md-chip 时抛出错误，但它从未抛出任何错误。

Answer 1

这是因为指令改变了数组，而 value(array) 永远不会改变。

例如，您可以将以下 $watch 添加到您的指令中：

scope.$watch(function(){
 return ctrl.$modelValue && ctrl.$modelValue.length;  
}, function(){
 ctrl.$validate();
});

Answer 2

让我们将人员选择器组合的 required 指令重命名为 ppcRequired，否则它将应用于任何其他需要的指令输入。人物选择器看起来像

<people-picker ppc-required 
               name="user" 
               service="ctrl.userLookupService" 
               max-chips="10" 
               placeholder="User" 
               secondary-placeholder="Add Another?" 
               ng-model="ctrl.users"  
               aria-label="Users"></people-picker>
<div ng-messages="(pForm.$submitted || pForm.user.$touched) && pForm.user.$error" class="customMessages">
  <div ng-message="required">User is required</div>
  <div ng-message="resolve">One or more users have not been resolved</div>
</div>

由于模型更改时所需的验证器不是运行 (https://github.com/angular/material/issues/8126)，让我们使用 $watch 来触发所需的更改：

angular.module('peoplePickerCombo').directive('ppcRequired',   function() {
  return {
    restrict: "A",
    require: 'ngModel',
    link: function(scope, element, attrs, ngModelCtrl) {
      if (!ngModelCtrl) {
        return false;
      }

      // override $isEmpty function
      ngModelCtrl.$isEmpty = function (val) {
        return !val || !val.length;
      };

      // add required validator
      ngModelCtrl.$validators.required = function(modelValue) {
        return !ngModelCtrl.$isEmpty(modelValue);
      };

      // watch for changes
      scope.$watch(attrs.ngModel, function (nVal, oVal) {
        if (nVal && nVal !== oVal) {
          // run validations
          ngModelCtrl.$$runValidators(nVal, oVal, function () {});
          // update css classes
          ngModelCtrl.$setTouched();
          ngModelCtrl.$$updateEmptyClasses(nVal);
        }
      }, 1);
    }
  }
});

另外2个标题输入被MD标记为无效，但它们仍然没有被修改，所以我们添加CSS class md-touched，仅当触摸字段或提交表单时才会出现：

<md-input-container class="md-block" 
                    ng-class="{'md-touched': pForm.title.$touched || pForm.$submitted}" 
                    flex>
  <input type="text" 
         placeholder="Title" 
         aria-label="Title" 
         required 
         name="title" 
         ng-model="ctrl.Title">
  <div ng-messages="(pForm.$submitted || pForm.title.$touched) && pForm.title.$error">
    <div ng-message="required">Title is required</div>
  </div>
</md-input-container>

添加一些CSS:

md-input-container.md-touched.md-input-invalid label.md-required::after,
md-input-container.md-touched.md-input-invalid label.md-required,
people-picker.ng-invalid-required md-input-container label,
people-picker.ng-invalid-required md-input-container.md-input-focused label {
  color: rgb(221, 44, 0);
}
md-input-container.md-input-invalid label.md-required::after,
md-input-container.md-input-focused label.md-required::after,
md-input-container.md-input-has-value label.md-required::after,
md-input-container.md-input-invalid label.md-required {
  color: rgba(0, 0, 0, 0.54);
}
md-input-container.md-touched.md-input-invalid .md-input {
  border-color: rgb(221, 44, 0);
}
md-input-container.md-input-invalid .md-input {
  border-color: rgba(0, 0, 0, 0.12);
}
people-picker.ng-invalid-required md-chips .md-chips {
  box-shadow: 0 1px rgb(221, 44, 0);
}
people-picker + .customMessages [ng-message] {
  font-size: 12px;
  line-height: 14px;
  margin-top: 0;
  opacity: 1;
  overflow: hidden;
  padding-top: 5px;
  transition: all 0.3s cubic-bezier(0.55, 0, 0.55, 0.2) 0s;
  color: rgb(221, 44, 0);
} 
[ppc-required] md-input-container label::after {
  content: " *";
  font-size: 13px;
  vertical-align: top;
}

笨蛋：https://plnkr.co/edit/43HOJRJ6WsAqnbvHONVl?p=preview

angular $validators 没有开火或行为不端

angular $validators not firing or misbehaving

angularjs

angular-material

md-autocomplete

md-chip