gitlab-org--gitlab-foss/db/post_migrate/20170526185901_remove_stage...

class RemoveStageIdIndexFromBuilds < ActiveRecord::Migration[4.2]
  include Gitlab::Database::MigrationHelpers

  DOWNTIME = false

  disable_ddl_transaction!

  def up
    if index_exists?(:ci_builds, :stage_id)
      remove_foreign_key(:ci_builds, column: :stage_id)
      remove_concurrent_index(:ci_builds, :stage_id)
    end
  end

  def down
    # noop
  end
end
Add version 4.2 to all existing migrations DB schema generated by a migration may look different in rails 4 and 5 (because rails 5 may use different default values). For this reason it's important to explicitly set for which rails version a migration was written for. See https://stackoverflow.com/questions/35929869/activerecordmigration-deprecation-warning-asks-for-rails-version-but-im-no/35930912#35930912 2018-11-13 07:27:31 +00:00			`class RemoveStageIdIndexFromBuilds < ActiveRecord::Migration[4.2]`
Fix build stages reference migration 2017-06-21 08:32:45 +00:00			`include Gitlab::Database::MigrationHelpers`

			`DOWNTIME = false`

			`disable_ddl_transaction!`

			`def up`
			`if index_exists?(:ci_builds, :stage_id)`
Fix adding/removing foreign keys on MySQL 2017-06-21 09:02:18 +00:00			`remove_foreign_key(:ci_builds, column: :stage_id)`
Fix build stages reference migration 2017-06-21 08:32:45 +00:00			`remove_concurrent_index(:ci_builds, :stage_id)`
			`end`
			`end`

			`def down`
			`# noop`
			`end`
			`end`