if(!empty($q['_is_in_group'])){
$this->selectAdd("
- COALESCE(
- (SELECT id from core_group_member
+ COALESCE((
+ SELECT
+ COUNT(id)
+ FROM
+ core_group_member
WHERE
user_id = {$q['_is_in_group']}
AND
group_id = {$this->tableName()}.id
- LIMIT 1
- ),0) as group_membership_user_id
+ ), 0) AS is_in_group
");
}