angularjs – 错误：[$compile：multidir]多个指令

myApp.directive('input',function () {
    return {
        restrict: 'E',scope: true,link: function (scope,elem) {
            if (scope.lang && elem.attr('type') === 'text') {
                elem.attr('lang','fa');
                console.log(scope.lang);
            }
        }
    };
});

将lang =’fa’属性添加到所有输入：文本,我也使用DatePicker angular Ui,但我收到一个错误：

Error:   
    [$compile:multidir] Multiple directives [datepickerPopupPersian,input] asking for  

     new/isolated scope on:  
     <input type="date" name="birth" class="form-control ng-pristine   
    ng-untouched ng-valid"  
     datepicker-popup-persian="{{formats.ShowDate}}" tabindex="7"   
    ng-model="requesterViewModel.BirthDate"   
    is-open="datePicker.opened" datepicker-options="dateOptions" date-disabled="disabled(date,mode)"  
 close-text="????"  
     max-date="dt">

当我在我的表单中评论datePicker一切正常.
任何的想法？谢谢