Difference between #9 and #10 of
The Comedy of Errors

Revision #10 has been created by Mike on May 3, 2013, 1:57:40 PM with the memo:

Add problem with CMenu and visible=>null
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The Comedy of Errors

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Others

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errors comedy

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[...]
$total += $rel->count;
}
echo $total; // wrong result!!
```

I wasted 12 hours debugging this.
 
 
`visible` option in CMenu and `null` values
 
-----------------------------------------
 
 
Use a parameter `feature.enabled` to enable/disable a feature through configuration. And then wonder why you still see the menu item, even if you have no `feature.enabled` parameter at all.
 
 
 
```php 
<?php $this->widget('zii.widgets.CMenu', array(
 
    'items' => array(
 
        array(
 
            'label' => 'A new feature',
 
            'url' => array('feature/view'),
 
            'visible' => Yii::app()->params['feature.enabled'],
 
        ),
 
```
 
 
`Yii::app()->params['feature.enabled']` returns `null` if the parameter is not defined. But in this case that's different from `false` because `CMenu` uses `isset($items['visible'])` which returns `false` for `null` values.
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Viewed: 19 738 times
Version: 1.1
Category: Others
Tags: errors comedy
Written by: fsb
Last updated by: Mike
Created on: Dec 7, 2011
Last updated: 11 years ago
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