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 MergeRequestsMergeUserIdForeignKey < ActiveRecord::Migration
|
||
|
include Gitlab::Database::MigrationHelpers
|
||
|
|
||
|
# Set this constant to true if this migration requires downtime.
|
||
|
DOWNTIME = false
|
||
|
|
||
|
disable_ddl_transaction!
|
||
|
|
||
|
class MergeRequest < ActiveRecord::Base
|
||
|
include EachBatch
|
||
|
|
||
|
self.table_name = 'merge_requests'
|
||
|
|
||
|
def self.with_orphaned_mergers
|
||
|
where('NOT EXISTS (SELECT true FROM users WHERE merge_requests.merge_user_id = users.id)')
|
||
|
.where('merge_user_id IS NOT NULL')
|
||
|
end
|
||
|
end
|
||
|
|
||
|
def up
|
||
|
MergeRequest.with_orphaned_mergers.each_batch(of: 100) do |batch|
|
||
|
batch.update_all(merge_user_id: nil)
|
||
|
end
|
||
|
|
||
|
add_concurrent_index(
|
||
|
:merge_requests,
|
||
|
:merge_user_id,
|
||
|
where: 'merge_user_id IS NOT NULL'
|
||
|
)
|
||
|
|
||
|
add_concurrent_foreign_key(
|
||
|
:merge_requests,
|
||
|
:users,
|
||
|
column: :merge_user_id,
|
||
|
on_delete: :nullify
|
||
|
)
|
||
|
end
|
||
|
|
||
|
def down
|
||
|
remove_foreign_key_without_error(:merge_requests, column: :merge_user_id)
|
||
|
remove_concurrent_index(:merge_requests, :merge_user_id)
|
||
|
end
|
||
|
end
|