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