SELECT * FROM (
            SELECT t.*, array_to_json(array_agg(row_to_json(tu2))) as userss
            FROM tasks t
            INNER JOIN (
                        SELECT tu.task_id, tu.role_id, u.name, u.email
                        FROM task_users tu
                        INNER JOIN core."user" u ON u.id = tu.user_id
                        WHERE EXISTS (
                                    SELECT *
                                    FROM task_users tuA
                                    INNER JOIN core."user" uA ON uA.id = tuA.user_id
                                    WHERE tuA.task_id = tu.task_id
                                    AND tuA.user_id = 27 AND tuA.role_id = '4'
                        )  AND
                        EXISTS (
                                    SELECT *
                                    FROM task_users tuA
                                    INNER JOIN core."user" uA ON uA.id = tuA.user_id
                                    WHERE tuA.task_id = tu.task_id
                                    AND tuA.user_id = 11 AND tuA.role_id = '3'
                        )
            ) tu2 ON tu2.task_id = t."id"
            GROUP BY t.id
) as test1
INNER JOIN task_states ON test1.state_id = task_states.id