Setting Table
id |   var    | val | valdef | status |
1  | MaxLeave | 12  |   12   |    1   |

val,valdef,status,var as varchar

public function getDaysOfLeaveLeft() {
        $models = LeaveTable::findAll(['EmpId' => $this->EmpId]);
        $leave = 0;
        foreach ($models as $model) {
            $leave += $model->daysleave;
        }
        $setting = Setting::find(['var' => 'MaxLeave']);
        //marks for error (return $setting->val - $leave;)
    }