42 lines
1 KiB
Ruby
42 lines
1 KiB
Ruby
class FillPagesDomainVerificationCode < ActiveRecord::Migration[4.2]
|
|
DOWNTIME = false
|
|
|
|
class PagesDomain < ActiveRecord::Base
|
|
include EachBatch
|
|
end
|
|
|
|
# Allow this migration to resume if it fails partway through
|
|
disable_ddl_transaction!
|
|
|
|
def up
|
|
PagesDomain.where(verification_code: [nil, '']).each_batch do |relation|
|
|
connection.execute(set_codes_sql(relation))
|
|
|
|
# Sleep 2 minutes between batches to not overload the DB with dead tuples
|
|
sleep(2.minutes) unless relation.reorder(:id).last == PagesDomain.reorder(:id).last
|
|
end
|
|
|
|
change_column_null(:pages_domains, :verification_code, false)
|
|
end
|
|
|
|
def down
|
|
change_column_null(:pages_domains, :verification_code, true)
|
|
end
|
|
|
|
private
|
|
|
|
def set_codes_sql(relation)
|
|
ids = relation.pluck(:id)
|
|
whens = ids.map { |id| "WHEN #{id} THEN '#{SecureRandom.hex(16)}'" }
|
|
|
|
<<~SQL
|
|
UPDATE pages_domains
|
|
SET verification_code =
|
|
CASE id
|
|
#{whens.join("\n")}
|
|
END
|
|
WHERE id IN(#{ids.join(',')})
|
|
SQL
|
|
end
|
|
end
|