File size: 1,478 Bytes
1e92f2d |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 |
-- +migrate Up
ALTER TABLE escalation_policy_steps
DROP CONSTRAINT escalation_policy_steps_escalation_policy_id_step_number_key,
ADD UNIQUE(escalation_policy_id, step_number) DEFERRABLE INITIALLY DEFERRED; -- Needs to be deferrable in order to reorder steps else query will fail.
-- +migrate StatementBegin
CREATE OR REPLACE FUNCTION move_escalation_policy_step(_id UUID, _new_pos INT) RETURNS VOID AS
$$
DECLARE
_old_pos INT;
_epid UUID;
BEGIN
SELECT step_number, escalation_policy_id into _old_pos, _epid FROM escalation_policy_steps WHERE id = _id;
IF _old_pos > _new_pos THEN
UPDATE escalation_policy_steps
SET step_number = step_number + 1
WHERE escalation_policy_id = _epid
AND step_number < _old_pos
AND step_number >= _new_pos;
ELSE
UPDATE escalation_policy_steps
SET step_number = step_number - 1
WHERE escalation_policy_id = _epid
AND step_number > _old_pos
AND step_number <= _new_pos;
END IF;
UPDATE escalation_policy_steps
SET step_number = _new_pos
WHERE id = _id;
END;
$$ LANGUAGE 'plpgsql';
-- +migrate StatementEnd
-- +migrate Down
ALTER TABLE escalation_policy_steps
DROP CONSTRAINT escalation_policy_steps_escalation_policy_id_step_number_key,
ADD CONSTRAINT escalation_policy_steps_escalation_policy_id_step_number_key UNIQUE (escalation_policy_id, step_number);
DROP FUNCTION move_escalation_policy_step(_id UUID, _new_pos INT);
|