Can I force Yii to use particular alias in generated SQL

Question

I'm retrieving my records using CActiveRecord with a with() statement:

Probes::model()->with(array
(
    'user',
    'results',
    'results.answer',
    'survey',
    'survey.questions'
))->findByPk($id)

I wanted to use GROUP BY on question_id field of survey.questions relation, so I changed above to:

'survey.questions'=>array('group'=>'survey.questions.question_id'),

This caused a SQL exception 1054 Unknown column. However, by analyzing attached SQL code:

`questions`.`question_id` AS `t6_c2`

I managed to find out, that I have to use t6_c2 alias (auto-generated by Yii?). So, another change to:

'survey.questions'=>array('group'=>'t6_c2'),

and the problem is solved.

But, then again, alias t6_c2 seems quite... "unstable" (auto-generated?) for me. Can I force Yii to in this part of generated SQL some other alias, provided by me? Or how certain can I be, that this part of SQL code won't change upon next (some later) generation? Or -- is there any other way to achieve, what I want to achieve?

Answer 1

you can assign alias to your relation

,
'survey.questions'=>array(
    'alias' => 'surq'
    'group'=>'surq.question_id',
),

read this and this for more info

Answer 2

You can set specific and unique alias for each relation table in a relations method in your model. For example,"user"=>array(self::HAS_MANY, "User", "user_id", "alias"=>"your_alias_for_this_relation")

Answer 3

Try this (i'm asumming 'survey.questions' is a field of the table probe)

Prove::model()->findByPk($id)->survey.questions, CHtml::listData(Prove::model()->findAll(array("order"=>"survey.questions")),