angularjs – ngMessages在指令模板中不起作用

我有一个带有模板和链接函数的指令myInput,在模板函数中我为包装的< label>创建了模板字符串.和< input>.

在Link函数内部,我使用require：’^ form’FormController并检索表单名称.然后我在包装元素之后放置一个ngMessages块.

(function () {
        'use strict';

        angular
            .module('app.components')
            .directive('myInput',MyInput);

        /*@ngInject*/
        function MyInput($compile,ValidatorService,_,LIST_OF_VALIDATORS) {
            return {
                require: '^form',restrict: 'E',controller: MyInputController,controllerAs: 'vm',bindToController: true,template: TemplateFunction,scope: {
                    label: '@',id: '@',value: '=',validateCustom: '&'
                },link: MyInputLink

            };

            function MyInputController($attrs) {
                var vm = this;
                vm.value = '';
                vm.validateClass = '';
                vm.successMessage = '';
                vm.errorMessage = '';
            }

            function TemplateFunction(tElement,tAttrs) {
                return '<div class="input-field">' +
                    '   <label id="input_{{vm.id}}_label" for="input_{{vm.id}}" >{{vm.label}}</label>' +
                    '   <input id="input_{{vm.id}}" name="{{vm.id}}" ng-class="vm.validateClass" type="text" ng-model="vm.value" >' +
                    '</div>';

            }

            function MyInputLink(scope,element,attrs,form){
                var extra = '   <div ng-messages="' + form.$name + '.' + scope.vm.id + '.$error">' +
                    '       <div ng-messages-include="/modules/components/validationMessages.html"></div>' +
                    '   </div>';
                $(element).after(extra);
            }
        }
    })();

用法：

<h1>Test</h1>
    <form name="myForm">
        <my-input label="My Input" id="input1" value="vm.input1"></my-input>

        -------

        <!-- this block is hardcoded and is working,it does not come from the directive! -->
        <div ng-messages="myForm.input1.$error">
            <div ng-messages-include="/modules/components/validationMessages.html"></div>
        </div>

    </form>