public $group_id; // int(11)
public $id; // int(11) not_null primary_key auto_increment
public $user_id; // int(11) not_null
public $group_id; // int(11)
public $id; // int(11) not_null primary_key auto_increment
public $user_id; // int(11) not_null
$t->joinAdd($grp , 'LEFT');
//$person->id = (int)$person->id;
$t->whereAdd("
$t->joinAdd($grp , 'LEFT');
//$person->id = (int)$person->id;
$t->whereAdd("