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rollback migration

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This commit is contained in:
Sylvain 2022-07-05 11:26:10 +02:00
parent 8be2425275
commit dbf624c17f
1 changed files with 47 additions and 39 deletions
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86
db/migrate/20220704084929_add_reservation_fields_to_slots_reservations.rb
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@ -10,7 +10,7 @@ class AddReservationFieldsToSlotsReservations < ActiveRecord::Migration[5.2]
add_column :slots_reservations, :canceled_at, :datetime
add_column :slots_reservations, :offered, :boolean
execute %(
execute <<-SQL
UPDATE slots_reservations
SET
ex_start_at=slots.ex_start_at,
@ -19,7 +19,7 @@ class AddReservationFieldsToSlotsReservations < ActiveRecord::Migration[5.2]
offered=slots.offered
FROM slots
WHERE slots_reservations.slot_id = slots.id
)
SQL
remove_column :slots, :ex_start_at
remove_column :slots, :ex_end_at
@ -30,7 +30,7 @@ class AddReservationFieldsToSlotsReservations < ActiveRecord::Migration[5.2]
# we gonna keep only only one slot (remove duplicates) because data is now hold in slots_reservations
# update slots_reservation.slot_id
execute %(
execute <<-SQL
UPDATE slots_reservations
SET slot_id=r.kept
FROM (
@ -39,45 +39,53 @@ class AddReservationFieldsToSlotsReservations < ActiveRecord::Migration[5.2]
GROUP BY start_at, end_at, availability_id
HAVING count(*) > 1) as r
WHERE slot_id = ANY(r.all_ids);
)
SQL
# remove useless slots
execute %q(
WITH same_slots AS (
SELECT count(*), start_at, end_at, availability_id, min(id) AS kept, array_agg(id) AS all_ids
FROM slots
GROUP BY start_at, end_at, availability_id
HAVING count(*) > 1
)
DELETE FROM slots
WHERE id IN (SELECT unnest(all_ids) FROM same_slots)
AND id NOT IN (SELECT kept FROM same_slots);
)
execute <<-SQL
WITH same_slots AS (
SELECT count(*), start_at, end_at, availability_id, min(id) AS kept, array_agg(id) AS all_ids
FROM slots
GROUP BY start_at, end_at, availability_id
HAVING count(*) > 1
)
DELETE FROM slots
WHERE id IN (SELECT unnest(all_ids) FROM same_slots)
AND id NOT IN (SELECT kept FROM same_slots);
SQL
end
def down
## FIXME, more than one row returned by a subquery used as an expression
## in UPDATE slots_reservations, slot_slots return all inserted ids
#
# WITH same_slots AS (
# SELECT count(*), array_agg(id) AS all_ids, slot_id
# FROM slots_reservations
# GROUP BY slot_id
# HAVING count(*) > 1
# ), slot AS (
# SELECT *
# FROM slots
# WHERE id IN (SELECT slot_id FROM same_slots)
# ), insert_slot AS (
# INSERT INTO slots (start_at, end_at, created_at, updated_at, availability_id)
# SELECT start_at, end_at, now(), now(), availability_id
# FROM slot
# RETURNING id
# )
# UPDATE slots_reservations
# SET slot_id=(SELECT id FROM insert_slot)
# WHERE id IN (SELECT unnest(all_ids) FROM same_slots);
#
execute <<-SQL
DO
$$
DECLARE
sr_group RECORD;
slot slots%ROWTYPE;
new_slot_id slots.id%TYPE;
curr_slot_reservation_id slots_reservations.id%TYPE;
BEGIN
FOR sr_group IN
SELECT count(*), array_agg(id) AS all_ids, slot_id
FROM slots_reservations
GROUP BY slot_id
HAVING count(*) > 1
LOOP
SELECT * INTO slot FROM slots WHERE id = sr_group.slot_id;
FOR curr_slot_reservation_id IN
SELECT unnest(sr_group.all_ids[2:])
LOOP
INSERT INTO slots (start_at, end_at, created_at, updated_at, availability_id)
VALUES (slot.start_at, slot.end_at, now(), now(), slot.availability_id)
RETURNING id INTO new_slot_id;
UPDATE slots_reservations
SET slot_id=new_slot_id
WHERE id=curr_slot_reservation_id;
END LOOP;
END LOOP;
END;
$$
SQL
add_column :slots, :ex_start_at, :datetime
add_column :slots, :ex_end_at, :datetime
@ -85,7 +93,7 @@ class AddReservationFieldsToSlotsReservations < ActiveRecord::Migration[5.2]
add_column :slots, :offered, :boolean
add_column :slots, :destroying, :boolean, default: false
execute %(
execute <<-SQL
UPDATE slots
SET
ex_start_at=slots_reservations.ex_start_at,
@ -94,7 +102,7 @@ class AddReservationFieldsToSlotsReservations < ActiveRecord::Migration[5.2]
offered=slots_reservations.offered
FROM slots_reservations
WHERE slots_reservations.slot_id = slots.id
)
SQL
remove_column :slots_reservations, :ex_start_at
remove_column :slots_reservations, :ex_end_at