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# frozen_string_literal: true
module Gitlab
module Database
module DynamicModelHelpers
BATCH_SIZE = 1_000
def define_batchable_model(table_name)
Class.new(ActiveRecord::Base) do
include EachBatch
self.table_name = table_name
self.inheritance_column = :_type_disabled
end
end
def each_batch(table_name, scope: ->(table) { table.all }, of: BATCH_SIZE)
if transaction_open?
raise <<~MSG.squish
each_batch should not run inside a transaction, you can disable
transactions by calling disable_ddl_transaction! in the body of
your migration class
MSG
end
scope.call(define_batchable_model(table_name))
.each_batch(of: of) { |batch| yield batch }
end
def each_batch_range(table_name, scope: ->(table) { table.all }, of: BATCH_SIZE)
each_batch(table_name, scope: scope, of: of) do |batch|
yield batch.pluck('MIN(id), MAX(id)').first
end
end
end
end
end
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