Need some explanation, please

In Yii docs right here in section 3. Controller it is stated, that:

I just don’t understand what it means:

Would much appreciate a good explanation!


it means that you make the call Model->save(), to save model data in the controller.

But the database call (e.g. insert/update query) to save model data to table should be there in the model. The controller should not interact with the database. If you are using Active Records, you need not worry about the save implementation, Yii takes care of it (save is implemented by CActiveRecord class)