lemmy/migrations/2020-08-25-132005_add_unique_ap_ids/up.sql

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-- Add unique ap_id for private_message, comment, and post
-- Need to delete the possible dupes for ones that don't start with the fake one
DELETE FROM private_message a USING (
SELECT
min(id) AS id,
ap_id
FROM
private_message
GROUP BY
ap_id
HAVING
count(*) > 1) b
WHERE
a.ap_id = b.ap_id
AND a.id <> b.id;
DELETE FROM post a USING (
SELECT
min(id) AS id,
ap_id
FROM
post
GROUP BY
ap_id
HAVING
count(*) > 1) b
WHERE
a.ap_id = b.ap_id
AND a.id <> b.id;
DELETE FROM comment a USING (
SELECT
min(id) AS id,
ap_id
FROM
comment
GROUP BY
ap_id
HAVING
count(*) > 1) b
WHERE
a.ap_id = b.ap_id
AND a.id <> b.id;
-- Replacing the current default on the columns, to the unique one
UPDATE
private_message
SET
ap_id = generate_unique_changeme ()
WHERE
ap_id = 'http://fake.com';
UPDATE
post
SET
ap_id = generate_unique_changeme ()
WHERE
ap_id = 'http://fake.com';
UPDATE
comment
SET
ap_id = generate_unique_changeme ()
WHERE
ap_id = 'http://fake.com';
-- Add the unique indexes
ALTER TABLE private_message
ALTER COLUMN ap_id SET NOT NULL;
ALTER TABLE private_message
ALTER COLUMN ap_id SET DEFAULT generate_unique_changeme ();
ALTER TABLE post
ALTER COLUMN ap_id SET NOT NULL;
ALTER TABLE post
ALTER COLUMN ap_id SET DEFAULT generate_unique_changeme ();
ALTER TABLE comment
ALTER COLUMN ap_id SET NOT NULL;
ALTER TABLE comment
ALTER COLUMN ap_id SET DEFAULT generate_unique_changeme ();
-- Add the uniques, for user_ and community too
ALTER TABLE private_message
ADD CONSTRAINT idx_private_message_ap_id UNIQUE (ap_id);
ALTER TABLE post
ADD CONSTRAINT idx_post_ap_id UNIQUE (ap_id);
ALTER TABLE comment
ADD CONSTRAINT idx_comment_ap_id UNIQUE (ap_id);
ALTER TABLE user_
ADD CONSTRAINT idx_user_actor_id UNIQUE (actor_id);
ALTER TABLE community
ADD CONSTRAINT idx_community_actor_id UNIQUE (actor_id);