yiisoft/yii — pull request #349 by musterknabe (2012-02-17 00:46:43+00:00)
Title: CHtml::checkBoxList can handle AR objects as selected values now (issue #83)

This fixes an issue with activeCheckBoxList not being able to handle relations as $attribute parameter.
It is adopted from activeListBox, but I'm not sure if this is the best solution. I think this is a more generic issue.