Angular dynamically set ng-messages to name attribute

问题

I dynamically create inputs and want also validate every one of them but cant set correctly the ng-messages attribute to the field name property which is dynamically generated.

<input ng-model="sub.name" name="subName{{$index}}" class="form-control" placeholder="name" required maxlength="20" />
         <div class="field-error" ng-messages="form.subName{{$index}}.$error" ng-show="form.Name.$touched" role="alert">
               <div ng-message="required">Name is required.</div>
          </div>

I got problem with second line where i set the ng-messages dynamically to ng-messages. How can I do this?

回答1:

Accessing the properties of your form object can also be done using brackets, which should solve your problem :

<input ng-model="sub.name" name="subName{{$index}}" class="form-control" placeholder="name" required maxlength="20" />
<div class="field-error" ng-messages="form['subName' + $index].$error" ng-show="form.Name.$touched" role="alert">
    <div ng-message="required">Name is required.</div>
</div>

来源：https://stackoverflow.com/questions/31456539/angular-dynamically-set-ng-messages-to-name-attribute