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defmodule Pleroma.Repo.Migrations.ChangeObjectIdToFlake do
@moduledoc """
Convert object IDs to FlakeIds.
Fortunately only a few tables have a foreign key to objects. Update them.
"""
use Ecto.Migration
@delete_duplicate_ap_id_objects_query """
DELETE FROM objects
WHERE id IN (
SELECT
id
FROM (
SELECT
id,
row_number() OVER w as rnum
FROM objects
WHERE data->>'id' IS NOT NULL
WINDOW w AS (
PARTITION BY data->>'id'
ORDER BY id
)
) t
WHERE t.rnum > 1)
"""
@convert_objects_int_ids_to_flake_ids_query """
alter table objects
drop constraint objects_pkey cascade,
alter column id drop default,
alter column id set data type uuid using cast( lpad( to_hex(id), 32, '0') as uuid),
add primary key (id)
"""
def up do
# Lock tables to avoid a running server meddling with our transaction
execute("LOCK TABLE objects")
execute("LOCK TABLE data_migration_failed_ids")
execute("LOCK TABLE chat_message_references")
execute("LOCK TABLE deliveries")
execute("LOCK TABLE hashtags_objects")
# Switch object IDs to FlakeIds
execute(fn ->
try do
repo().query!(@convert_objects_int_ids_to_flake_ids_query)
rescue
e in Postgrex.Error ->
# Handling of error 23505, "unique_violation": https://git.pleroma.social/pleroma/pleroma/-/issues/2771
with %{postgres: %{pg_code: "23505"}} <- e do
repo().query!(@delete_duplicate_ap_id_objects_query)
repo().query!(@convert_objects_int_ids_to_flake_ids_query)
else
_ -> raise e
end
end
end)
# Update data_migration_failed_ids
execute("""
alter table data_migration_failed_ids
drop constraint data_migration_failed_ids_pkey cascade,
alter column record_id set data type uuid using cast( lpad( to_hex(record_id), 32, '0') as uuid),
add primary key (data_migration_id, record_id)
""")
# Update chat message foreign key
execute("""
alter table chat_message_references
alter column object_id set data type uuid using cast( lpad( to_hex(object_id), 32, '0') as uuid),
add constraint chat_message_references_object_id_fkey foreign key (object_id) references objects(id) on delete cascade
""")
# Update delivery foreign key
execute("""
alter table deliveries
alter column object_id set data type uuid using cast( lpad( to_hex(object_id), 32, '0') as uuid),
add constraint deliveries_object_id_fkey foreign key (object_id) references objects(id) on delete cascade
""")
# Update hashtag many-to-many foreign key
execute("""
alter table hashtags_objects
alter column object_id set data type uuid using cast( lpad( to_hex(object_id), 32, '0') as uuid),
add constraint hashtags_objects_object_id_fkey foreign key (object_id) references objects(id) on delete cascade
""")
end
def down do
:ok
end
end
|
