angularjs - md Select required -


i'm trying load mddialog setting parameter (product in case), , when loads (md selects included) says fields required, , doesn't stop until change option.

the code :

<md-input-container class="md-block" flex-gt-sm style="min-width: 150px;">                     <label>expiration type</label>                     <md-select name="expirationtype" placeholder="expiration" ng-model="product.expirationtype" ng-required='product.name'>                         <md-option value="1">only expiry date</md-option>                         <md-option value="2">only shelflife</md-option>                         <md-option value="3">expiry date & shelflife</md-option>                         <md-option value="4">non expirable</md-option>                     </md-select>                     <div ng-messages="productform.expirationtype.$error" role="alert">                         <div ng-message="required">you must supply value.</div>                     </div>                 </md-input-container>

and js : 

   function editdialogcontroller($scope, $mddialog, $mdtoast, $log, $http, manufacturers, product) {           $scope.product = product;

(edit) i'm guessing has ng-pristine or ng-dirty attributes, in similar case when change product through function(activated button), material considers element changed, it's valid. there way launch function after mddialog loaded?


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