Question

Is it possible to make sub-queries in ActiveRecord in Yii?

i have a query like this:

select * from table1
where table1.field1 in (select table2.field2 from table2)

i’m currently using the fallowing code:

object1::model()->findAll(array('condition'=>'t.field1 in (select table2.field2 from table2)'))

[Edit]
i would like to know if there is a manner to construct the sub-query without using SQL, and without using joins.

Is there any solution ?

and thanks in advance.

Answer 1

First find doublets by db fields:

$model=new MyModel('search');
$model->unsetAttributes();

$criteria=new CDbCriteria();
$criteria->select='col1,col2,col3';
$criteria->group = 'col1,col2,col3';
$criteria->having = 'COUNT(col1) > 1 AND COUNT(col2) > 1 AND COUNT(col3) > 1';

Get the subquery:

$subQuery=$model->getCommandBuilder()->createFindCommand($model->getTableSchema(),$criteria)->getText();

Add the subquery condition:

$mainCriteria=new CDbCriteria();
$mainCriteria->condition=' (col1,col2,col3) in ('.$subQuery.') ';
$mainCriteria->order = 'col1,col2,col3';

How to use:

$result = MyModel::model()->findAll($mainCriteria);

Or:

$dataProvider = new CActiveDataProvider('MyModel', array(
        'criteria'=>$mainCriteria,
));

Source: http://www.yiiframework.com/wiki/364/using-sub-query-for-doubletts/