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# frozen_string_literal: true
# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.
class ScheduleEpicIssuesAfterEpicsMove < ActiveRecord::Migration[5.2]
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
INTERVAL = 5.minutes.to_i
BATCH_SIZE = 100
MIGRATION = 'MoveEpicIssuesAfterEpics'
disable_ddl_transaction!
class Epic < ActiveRecord::Base
self.table_name = 'epics'
include ::EachBatch
end
def up
return unless ::Gitlab.ee?
Epic.each_batch(of: BATCH_SIZE) do |batch, index|
range = batch.pluck('MIN(id)', 'MAX(id)').first
delay = index * INTERVAL
BackgroundMigrationWorker.perform_in(delay, MIGRATION, range)
end
end
def down
# no need
end
end
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