'q_comp' => array(self::HAS_ONE, 'Questions', array('event_id'=>'event_id'),'on' => 'q_comp.link_company=1'),
'q_ans_comp' => array(self::HAS_ONE, 'QuestionAnswers', array('event_id'=>'event_id'), 'on' => 'q_ans_comp.question_id=q_comp.id AND q_ans_comp.question_user_id=QuestionUsers .id', 'through'=>'q_comp'),
'q_comp' => [
self::HAS_ONE,
'Questions',
[ 'event_id' => 'event_id' ],
'on' => 'q_comp.link_company = 1'
],
'q_ans_comp' => [
self::HAS_ONE,
'QuestionAnswers',
['event_id' => 'event_id'],
'on' => 'q_ans_comp.question_id = q_comp.id AND q_ans_comp.question_user_id = QuestionUsers .id',
'through'=>'q_comp'
],