How to use 'IN (1,2,3)' with findAll?

Question

I need to get a couple of Students from the database, and I have their primary keys in a comma-separated string.

Normally using SQL it would be something like:

Answer 1

You can do it also that way:

$criteria = new CDbCriteria();
$criteria->addInCondition("id", array(1,2,3,4));
$result = Student::model()->findAll($criteria);

and use in array any values you need.

Aleksy

Answer 2

You can use findAllByAttributes method also:

$a=array(1,2,3,4);
$model = Student::model()->findAllByAttributes(array("id"=>$a));