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class AddGroupIdToBoardsCe < ActiveRecord::Migration[4.2]
include Gitlab::Database::MigrationHelpers
disable_ddl_transaction!
DOWNTIME = false
def up
return if group_id_exists?
# rubocop:disable Migration/AddConcurrentForeignKey
add_column :boards, :group_id, :integer
add_foreign_key :boards, :namespaces, column: :group_id, on_delete: :cascade
add_concurrent_index :boards, :group_id
change_column_null :boards, :project_id, true
end
def down
return unless group_id_exists?
# rubocop:disable Migration/RemoveIndex
remove_foreign_key :boards, column: :group_id
remove_index :boards, :group_id if index_exists? :boards, :group_id
remove_column :boards, :group_id
execute "DELETE from boards WHERE project_id IS NULL"
change_column_null :boards, :project_id, false
end
private
def group_id_exists?
column_exists?(:boards, :group_id)
end
end
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