masto-fe/db/migrate/20200622213645_media_attachment_ids_to_timestamp_ids.rb

17 lines
662 B
Ruby

class MediaAttachmentIdsToTimestampIds < ActiveRecord::Migration[5.2]
def up
# Set up the media_attachments.id column to use our timestamp-based IDs.
safety_assured do
execute("ALTER TABLE media_attachments ALTER COLUMN id SET DEFAULT timestamp_id('media_attachments')")
end
# Make sure we have a sequence to use.
Mastodon::Snowflake.ensure_id_sequences_exist
end
def down
execute('LOCK media_attachments')
execute("SELECT setval('media_attachments_id_seq', (SELECT MAX(id) FROM media_attachments))")
execute("ALTER TABLE media_attachments ALTER COLUMN id SET DEFAULT nextval('media_attachments_id_seq')")
end
end