Basics ¶
When an exception is thrown in our code like
throw new CHttpException(403, 'You are not authorized to perform this action.');
if it is a CHttpException or if YII_DEBUG is not true, the error message can be displayed by using CErrorHandler::errorAction. In the default code generated by yiic this is set to SiteController::actionError() by this settings in config/main.php
'errorHandler' => array(
'errorAction' => 'site/error',
),
But ¶
in Yii versions previous to 1.1.9 exceptions was handled differently during ajax request and displayed by CApplication::displayException(). This way the exception message displayed on ajax requests could not be customized.
The message for the CGridView delete request with YII_DEBUG set to true looked like
In Yii version 1.1.9 the check for ajax request has been removed so now the exception message is handled by CErrorHandler::errorAction even during ajax requests.
This way the message can be customized for ajax requests.
Example ¶
by using this code
public function actionError()
{
if($error=Yii::app()->errorHandler->error)
{
if(Yii::app()->request->isAjaxRequest)
echo $error['message'];
else
$this->render('error', $error);
}
}
the exception message for CGridView delete request will look like
Nice tip
A good idea could be to add
else throw new CHttpException(400, Yii::t('err', 'bad request'));if some one accessing error action directly...
Added back
It looks like the change MDomba made to the code has been undone. I see on line 284 of CErrorHandler.php, there is a check for $this->isAjaxRequest() and the code is directed to CApplication::displayError().
Another solution
In the new versions you can't do it like this since ajax request are redirected to
CApplication::displayErroras Stephen51 said.My solution is to catch the exception, set an error header and then echo your message. In the next example I'm catching
CDbExceptionand check if the error is "a foreign key constraint fails" (sql error 1451). If it is I display the message, otherwise I throw back the exception:try { $this->loadModel($id)->delete(); } catch (CDbException $e) { if($e->errorInfo[1] == 1451) { header("HTTP/1.0 400 Relation Restriction"); echo "Your error message.\n"; } else { throw $e; } }If you have any questions, please ask in the forum instead.
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