yii2.0 find_in_set
use yiidbExpression;
$query->andWhere([ 'or', ['os.user_id' => Yii::$app->user->id], new Expression("FIND_IN_SET(:other_ids, other_ids)",[":other_ids"=>Yii::$app->user->id]) ]);
use yiidbExpression;
$query->andWhere([ 'or', ['os.user_id' => Yii::$app->user->id], new Expression("FIND_IN_SET(:other_ids, other_ids)",[":other_ids"=>Yii::$app->user->id]) ]);