code: protected function actionDelImage(Eresus_CMS_Request $request)
      {
          $article = $this->findArticle($request->query->getInt('id'));
          $article->image = null;
          $url = $this->getPage()->url(array('id' => $article->id, 'action' => 'edit'));
          return new Eresus_HTTP_Redirect($url);
      }
docs: Удаляет картинку статьи
  
  @param Eresus_CMS_Request $request
  
  @return Eresus_HTTP_Response