47 lines
1.2 KiB
Ruby
47 lines
1.2 KiB
Ruby
# See http://doc.gitlab.com/ce/development/migration_style_guide.html
|
|
# for more information on how to write migrations for GitLab.
|
|
|
|
class SwapEventMigrationTables < ActiveRecord::Migration
|
|
include Gitlab::Database::MigrationHelpers
|
|
|
|
# Set this constant to true if this migration requires downtime.
|
|
DOWNTIME = false
|
|
|
|
class Event < ActiveRecord::Base
|
|
self.table_name = 'events'
|
|
end
|
|
|
|
def up
|
|
rename_tables
|
|
end
|
|
|
|
def down
|
|
rename_tables
|
|
end
|
|
|
|
def rename_tables
|
|
rename_table :events, :events_old
|
|
rename_table :events_for_migration, :events
|
|
rename_table :events_old, :events_for_migration
|
|
|
|
# Once swapped we need to reset the primary key of the new "events" table to
|
|
# make sure that data created starts with the right value. This isn't
|
|
# necessary for events_for_migration since we replicate existing primary key
|
|
# values to it.
|
|
if Gitlab::Database.postgresql?
|
|
reset_primary_key_for_postgresql
|
|
else
|
|
reset_primary_key_for_mysql
|
|
end
|
|
end
|
|
|
|
def reset_primary_key_for_postgresql
|
|
reset_pk_sequence!(Event.table_name)
|
|
end
|
|
|
|
def reset_primary_key_for_mysql
|
|
amount = Event.pluck('COALESCE(MAX(id), 1)').first
|
|
|
|
execute "ALTER TABLE #{Event.table_name} AUTO_INCREMENT = #{amount}"
|
|
end
|
|
end
|