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# frozen_string_literal: true
module Gitlab
module BackgroundMigration
# This background migration creates records on user_highest_roles according to
# the given user IDs range. IDs will load users with a left outer joins to
# have a record for users without a Group or Project. One INSERT per ID is
# issued.
class PopulateUserHighestRolesTable
BATCH_SIZE = 100
# rubocop:disable Style/Documentation
class User < ActiveRecord::Base
self.table_name = 'users'
scope :active, -> {
where(state: 'active', user_type: nil, bot_type: nil)
.where('ghost IS NOT TRUE')
}
end
def perform(from_id, to_id)
return unless User.column_names.include?('bot_type')
(from_id..to_id).each_slice(BATCH_SIZE) do |ids|
execute(
<<-EOF
INSERT INTO user_highest_roles (updated_at, user_id, highest_access_level)
#{select_sql(from_id, to_id)}
ON CONFLICT (user_id) DO
UPDATE SET highest_access_level = EXCLUDED.highest_access_level
EOF
)
end
end
private
def select_sql(from_id, to_id)
User
.select('NOW() as updated_at, users.id, MAX(access_level) AS highest_access_level')
.joins('LEFT OUTER JOIN members ON members.user_id = users.id AND members.requested_at IS NULL')
.where(users: { id: active_user_ids(from_id, to_id) })
.group('users.id')
.to_sql
end
def active_user_ids(from_id, to_id)
User.active.where(users: { id: from_id..to_id }).pluck(:id)
end
def execute(sql)
@connection ||= ActiveRecord::Base.connection
@connection.execute(sql)
end
end
end
end
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