TYPO3 Core

Bug #81813

Updated by Tizian Schmidlin over 7 years ago

In @TYPO3\CMS\Backend\Template\Components\Buttons\Actions\ShortcutButton@ the @__toString()@-Method might throw an exception, since the @render@-Method uses the @ModuleTemplate->makeShortcutIcon@-Method which itself may throw an exception, since this calls @BackendUtility::shortcutExists@-Method which itself checks the database with a prepared statement. This _might_ happen if the table lock cannot be acquired for some reason. 

 Now I don't think that every method making database calls should anootate <code>@throws</code> @throws if it doesn't handle database exception since this might be handled somewhere higher already *but* PHPs magic @__toString@-method cannot throw an exception and I think that there the exception should be caught and either silenced or handled accordingly to the current environment. 

 My simple approach would be as follows: 

 <pre><code class="PHP"> 
     /** 
      * Renders the button 
      * 
      * @return string 
      */ 
     public function __toString() 
     { 
    	 try { 
    		 return $this->render(); 
    	 } catch(\Exception) { 
    		 // ensure that the exception is handled properly (regarding logging and info text if needed for the shortcut button) 
    		 return ''; 
    	 } 
     } 
 </code></pre> 

 I'll leave the category open on purpose since I'm not sure to which "Backend"-category this belongs. 

 Regards 
 Tizian

Back