39 lines
1.1 KiB
Ruby
39 lines
1.1 KiB
Ruby
|
class AddForeignKeysToTodos < ActiveRecord::Migration
|
||
|
include Gitlab::Database::MigrationHelpers
|
||
|
|
||
|
class Todo < ActiveRecord::Base
|
||
|
self.table_name = 'todos'
|
||
|
include EachBatch
|
||
|
end
|
||
|
|
||
|
BATCH_SIZE = 1000
|
||
|
|
||
|
DOWNTIME = false
|
||
|
|
||
|
disable_ddl_transaction!
|
||
|
|
||
|
def up
|
||
|
Todo.where('NOT EXISTS ( SELECT true FROM users WHERE id=todos.user_id )').each_batch(of: BATCH_SIZE) do |batch|
|
||
|
batch.delete_all
|
||
|
end
|
||
|
|
||
|
Todo.where('NOT EXISTS ( SELECT true FROM users WHERE id=todos.author_id )').each_batch(of: BATCH_SIZE) do |batch|
|
||
|
batch.delete_all
|
||
|
end
|
||
|
|
||
|
Todo.where('note_id IS NOT NULL AND NOT EXISTS ( SELECT true FROM notes WHERE id=todos.note_id )').each_batch(of: BATCH_SIZE) do |batch|
|
||
|
batch.delete_all
|
||
|
end
|
||
|
|
||
|
add_concurrent_foreign_key :todos, :users, column: :user_id, on_delete: :cascade
|
||
|
add_concurrent_foreign_key :todos, :users, column: :author_id, on_delete: :cascade
|
||
|
add_concurrent_foreign_key :todos, :notes, column: :note_id, on_delete: :cascade
|
||
|
end
|
||
|
|
||
|
def down
|
||
|
remove_foreign_key :todos, :users
|
||
|
remove_foreign_key :todos, column: :author_id
|
||
|
remove_foreign_key :todos, :notes
|
||
|
end
|
||
|
end
|