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# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.
class PopulateMissingMergeRequestStatuses < ActiveRecord::Migration[4.2]
include Gitlab::Database::MigrationHelpers
# Set this constant to true if this migration requires downtime.
DOWNTIME = false
disable_ddl_transaction!
class MergeRequest < ActiveRecord::Base
include EachBatch
self.table_name = 'merge_requests'
end
def up
say 'Populating missing merge_requests.state values'
# GitLab.com has no rows where "state" is NULL, and technically this should
# never happen. However it doesn't hurt to be 100% certain.
MergeRequest.where(state: nil).each_batch do |batch|
batch.update_all(state: 'opened')
end
say 'Populating missing merge_requests.merge_status values. ' \
'This will take a few minutes...'
# GitLab.com has 66 880 rows where "merge_status" is NULL, dating back all
# the way to 2011.
MergeRequest.where(merge_status: nil).each_batch(of: 10_000) do |batch|
batch.update_all(merge_status: 'unchecked')
# We want to give PostgreSQL some time to vacuum any dead tuples. In
# production we see it takes roughly 1 minute for a vacuuming run to clear
# out 10-20k dead tuples, so we'll wait for 90 seconds between every
# batch.
sleep(90) if sleep?
end
end
def down
# Reverting this makes no sense.
end
def sleep?
Rails.env.staging? || Rails.env.production?
end
end
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