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diff --git a/priv/repo/migrations/20211218181632_change_object_id_to_flake.exs b/priv/repo/migrations/20211218181632_change_object_id_to_flake.exs
index da62063f5..117579052 100644
--- a/priv/repo/migrations/20211218181632_change_object_id_to_flake.exs
+++ b/priv/repo/migrations/20211218181632_change_object_id_to_flake.exs
@@ -1,51 +1,85 @@
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
# Switch object IDs to FlakeIds
- execute("""
- 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)
- """)
+ 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

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