27 lines
792 B
Ruby
27 lines
792 B
Ruby
# frozen_string_literal: true
|
|
|
|
class AddDuplicatedToToIssue < ActiveRecord::Migration[5.2]
|
|
include Gitlab::Database::MigrationHelpers
|
|
|
|
DOWNTIME = false
|
|
|
|
disable_ddl_transaction!
|
|
|
|
def up
|
|
add_column :issues, :duplicated_to_id, :integer unless duplicated_to_id_exists?
|
|
add_concurrent_foreign_key :issues, :issues, column: :duplicated_to_id, on_delete: :nullify
|
|
add_concurrent_index :issues, :duplicated_to_id, where: 'duplicated_to_id IS NOT NULL'
|
|
end
|
|
|
|
def down
|
|
remove_foreign_key_without_error(:issues, column: :duplicated_to_id)
|
|
remove_concurrent_index(:issues, :duplicated_to_id)
|
|
remove_column(:issues, :duplicated_to_id) if duplicated_to_id_exists?
|
|
end
|
|
|
|
private
|
|
|
|
def duplicated_to_id_exists?
|
|
column_exists?(:issues, :duplicated_to_id)
|
|
end
|
|
end
|