1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
class AddGroupToTodos < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
disable_ddl_transaction!
def up
add_column :todos, :group_id, :integer
add_foreign_key :todos, :namespaces, column: :group_id, on_delete: :cascade
add_concurrent_index :todos, :group_id
change_column_null :todos, :project_id, true
end
def down
return unless group_id_exists?
remove_foreign_key :todos, column: :group_id
remove_index :todos, :group_id if index_exists?(:todos, :group_id)
remove_column :todos, :group_id
execute "DELETE FROM todos WHERE project_id IS NULL"
change_column_null :todos, :project_id, false
end
private
def group_id_exists?
column_exists?(:todos, :group_id)
end
end
|
