public function deleteByField($field, $value = null)
 {
     $post_category_model = new blogCategoryPostModel();
     if ($field == $this->id) {
         $ids = $value;
     } else {
         $ids = $this->select($this->id)->where($this->getWhereByField($field, $value))->fetchAll();
     }
     $post_category_model->deleteByField('category_id', $ids);
     parent::deleteByField($field, $value);
 }