42 lines
2 KiB
Ruby
42 lines
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 AddIndicesToIssueAssignees < ActiveRecord::Migration
|
||
|
|
include Gitlab::Database::MigrationHelpers
|
||
|
|
|
||
|
|
# Set this constant to true if this migration requires downtime.
|
||
|
|
DOWNTIME = false
|
||
|
|
|
||
|
|
# When a migration requires downtime you **must** uncomment the following
|
||
|
|
# constant and define a short and easy to understand explanation as to why the
|
||
|
|
# migration requires downtime.
|
||
|
|
# DOWNTIME_REASON = ''
|
||
|
|
|
||
|
|
# When using the methods "add_concurrent_index", "remove_concurrent_index" or
|
||
|
|
# "add_column_with_default" you must disable the use of transactions
|
||
|
|
# as these methods can not run in an existing transaction.
|
||
|
|
# When using "add_concurrent_index" or "remove_concurrent_index" methods make sure
|
||
|
|
# that either of them is the _only_ method called in the migration,
|
||
|
|
# any other changes should go in a separate migration.
|
||
|
|
# This ensures that upon failure _only_ the index creation or removing fails
|
||
|
|
# and can be retried or reverted easily.
|
||
|
|
#
|
||
|
|
# To disable transactions uncomment the following line and remove these
|
||
|
|
# comments:
|
||
|
|
disable_ddl_transaction!
|
||
|
|
|
||
|
|
def up
|
||
|
|
add_concurrent_index :issue_assignees, [:issue_id, :user_id], unique: true, name: 'index_issue_assignees_on_issue_id_and_user_id'
|
||
|
|
add_concurrent_index :issue_assignees, :user_id, name: 'index_issue_assignees_on_user_id'
|
||
|
|
add_concurrent_foreign_key :issue_assignees, :users, column: :user_id, on_delete: :cascade
|
||
|
|
add_concurrent_foreign_key :issue_assignees, :issues, column: :issue_id, on_delete: :cascade
|
||
|
|
end
|
||
|
|
|
||
|
|
def down
|
||
|
|
remove_foreign_key :issue_assignees, column: :user_id
|
||
|
|
remove_foreign_key :issue_assignees, column: :issue_id
|
||
|
|
remove_concurrent_index :issue_assignees, [:issue_id, :user_id] if index_exists?(:issue_assignees, [:issue_id, :user_id])
|
||
|
|
remove_concurrent_index :issue_assignees, :user_id if index_exists?(:issue_assignees, :user_id)
|
||
|
|
end
|
||
|
|
end
|