37 lines
1.3 KiB
Ruby
37 lines
1.3 KiB
Ruby
![]() |
# frozen_string_literal: true
|
||
|
|
||
|
module Gitlab
|
||
|
module Database
|
||
|
class Migration
|
||
|
# This implements a simple versioning scheme for migration helpers.
|
||
|
#
|
||
|
# We need to be able to version helpers, so we can change their behavior without
|
||
|
# altering the behavior of already existing migrations in incompatible ways.
|
||
|
#
|
||
|
# We can continue to change the behavior of helpers without bumping the version here,
|
||
|
# *if* the change is backwards-compatible.
|
||
|
#
|
||
|
# If not, we would typically override the helper method in a new MigrationHelpers::V[0-9]+
|
||
|
# class and create a new entry with a bumped version below.
|
||
|
#
|
||
|
# We use major version bumps to indicate significant changes and minor version bumps
|
||
|
# to indicate backwards-compatible or otherwise minor changes (e.g. a Rails version bump).
|
||
|
# However, this hasn't been strictly formalized yet.
|
||
|
MIGRATION_CLASSES = {
|
||
|
1.0 => Class.new(ActiveRecord::Migration[6.1]) do
|
||
|
include Gitlab::Database::MigrationHelpers::V2
|
||
|
end
|
||
|
}.freeze
|
||
|
|
||
|
def self.[](version)
|
||
|
MIGRATION_CLASSES[version] || raise(ArgumentError, "Unknown migration version: #{version}")
|
||
|
end
|
||
|
|
||
|
# The current version to be used in new migrations
|
||
|
def self.current_version
|
||
|
1.0
|
||
|
end
|
||
|
end
|
||
|
end
|
||
|
end
|