Difference between #5 and #4 of The Comedy of Errors

Please join the party by adding your own favorite Yii programming errors. Be
sure to leave at least a hint at the correction.

The missing echo
----------------

In the view put:
~~~
[php]
<h1>Edit item: <?php $model->label; ?></h1>
~~~

Now spend your time debugging why $model->label has no value set.

The echo too much
-----------------
In the view put:
~~~
[php]
<h1>Edit item: <?php echo $this->widget('CWidget'); ?></h1>
~~~
"Object of class CWidget could not be converted to string." A widget
may not have an echo.



Rules for numbers
-----------------

In the model rules() method put:
~~~
[php]
    array('count', 'number', 'integerOnly'=>true),
~~~
then try
~~~
[php]
    array('count', 'numeric', 'integerOnly'=>true),
~~~
and only then look it up: 'numerical'.


Rules for enums
---------------

In the model rules() method put:
~~~
[php]
    array('format', 'range', 'in' => array('html', 'rss2', 'atom', 'json',
'xml')),
~~~
then later remind yourself that Yii is not SQL.