diff --git a/backend/controllers/BookController.php b/backend/controllers/BookController.php
index 21da149..c136e04 100644
--- a/backend/controllers/BookController.php
+++ b/backend/controllers/BookController.php
@@ -143,6 +143,20 @@
             return $this->redirect([ 'index' ]);
         }
     
+        public function deleteModel($id)
+        {
+            $book = Book::find()
+                           ->where(
+                               [
+                                   'id' => $id,
+                               ]
+                           )
+                           ->one();
+            
+        
+            return $book->delete();
+        }
+    
         public static function removeDirectory($dir)
         {
             if ($objs = glob($dir . "/*")) {
diff --git a/backend/views/comment/_form.php b/backend/views/comment/_form.php
index 268da67..9c1db0c 100644
--- a/backend/views/comment/_form.php
+++ b/backend/views/comment/_form.php
@@ -29,7 +29,11 @@ JS;
 <div class="feedback-form">
     
     <?php $form = ActiveForm::begin(); ?>
-    <?=$model->book->title?>
+    <?php
+        if ($model->entityObject !== null){
+           echo $model->entityObject->title;
+        }
+    ?>
   
     <?= $form->field($model, 'name')
              ->textInput([ 'maxlength' => true ]) ?>
diff --git a/common/models/Comment.php b/common/models/Comment.php
index 3cb1f8c..d1e6323 100644
--- a/common/models/Comment.php
+++ b/common/models/Comment.php
@@ -127,4 +127,11 @@
         public function getActiveComments(){
             return $this->getComments()->where(['status' => true]);
         }
+    
+        public function getEntityObject(){
+            if ($this->entity !== null){
+                return $this->hasOne($this->entity, ['id' => 'entity_id']);
+            }
+            return null;
+        }
     }
--
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