fix

common/modules/bids/controllers/BidAdminController.php

@@ -2,6 +2,7 @@
 
 namespace common\modules\bids\controllers;
 
+use common\modules\bids\models\BidFile;
 use Yii;
 use common\modules\bids\models\Bid;
 use common\modules\bids\models\SearchBid;
@@ -21,6 +22,7 @@ class BidAdminController extends AdminController
             'Update'          => 'Редактирование заявки',
             'View'            => 'Просмотр заявки',
             'Delete'          => 'Удаление заявки',
+            'Download'          => '',
         ];
     }
 
@@ -110,7 +112,13 @@ class BidAdminController extends AdminController
 
     public function actionDownload($file)
     {
+        $model = BidFile::find()->where(['filename' => $file])->one();
         
+        if($model) {
+            return Yii::$app->response->sendFile(BidFile::path() . $model->filename, $model->filename);
+        } else {
+            throw new NotFoundHttpException('The requested page does not exist.');
+        }
     }
 
     /**