43 lines
1.6 KiB
Ruby
43 lines
1.6 KiB
Ruby
# rubocop:disable Migration/UpdateLargeTable
|
|
# rubocop:disable Migration/UpdateColumnInBatches
|
|
class MigrateAssignees < ActiveRecord::Migration[4.2]
|
|
include Gitlab::Database::MigrationHelpers
|
|
|
|
# Set this constant to true if this migration requires downtime.
|
|
DOWNTIME = false
|
|
|
|
# When a migration requires downtime you **must** uncomment the following
|
|
# constant and define a short and easy to understand explanation as to why the
|
|
# migration requires downtime.
|
|
# DOWNTIME_REASON = ''
|
|
|
|
# When using the methods "add_concurrent_index" or "add_column_with_default"
|
|
# you must disable the use of transactions as these methods can not run in an
|
|
# existing transaction. When using "add_concurrent_index" make sure that this
|
|
# method is the _only_ method called in the migration, any other changes
|
|
# should go in a separate migration. This ensures that upon failure _only_ the
|
|
# index creation fails and can be retried or reverted easily.
|
|
#
|
|
# To disable transactions uncomment the following line and remove these
|
|
# comments:
|
|
disable_ddl_transaction!
|
|
|
|
def up
|
|
# Optimisation: this accounts for most of the invalid assignee IDs on GitLab.com
|
|
update_column_in_batches(:issues, :assignee_id, nil) do |table, query|
|
|
query.where(table[:assignee_id].eq(0))
|
|
end
|
|
|
|
users = Arel::Table.new(:users)
|
|
|
|
update_column_in_batches(:issues, :assignee_id, nil) do |table, query|
|
|
query.where(table[:assignee_id].not_eq(nil)\
|
|
.and(
|
|
users.project("true").where(users[:id].eq(table[:assignee_id])).exists.not
|
|
))
|
|
end
|
|
end
|
|
|
|
def down
|
|
end
|
|
end
|