Yii框架1如何再次显示漂亮的框架错误？

Question

I remember that yii used to show nice errors with an awesome stacktrace. How do I get a helpful error again? Now I get rather unhelpful framework errors (as xdebug does well for php errors) like this:

Error 404

The system is unable to find the requested action "symbols".

No line number, no trace.

error.php:

<?php
/* @var $this SiteController */
/* @var $error array */

$this->pageTitle=Yii::app()->name . ' - Error';
$this->breadcrumbs=array(
    'Error',
);
?>

<h2>Error <?php echo $code; ?></h2>

<div class="error">
<?php echo CHtml::encode($message); ?>
</div>

Answer 1

be sure in you app\index.php you have a proper YII_DEBUG configuration

// remove the following lines when in production mode
defined('YII_DEBUG') or define('YII_DEBUG',true);
// specify how many levels of call stack should be shown in each log message
defined('YII_TRACE_LEVEL') or define('YII_TRACE_LEVEL',3); // development configuration 
//defined('YII_TRACE_LEVEL') or define('YII_TRACE_LEVEL',0); // production configuration