$data = Family::query()
    ->columns("*")
    ->leftJoin("FamilyUsers", 'a.family_id = Family.id', 'a')
    ->leftJoin("Users", 'b.id = a.user_id', 'b')
    ->where("a.family_id = $id_family")
    ->execute();
echo '<pre>';
print_r($data -> toArray());
exit;
But I can't get, I want to query data, could you tell me how do I change?