diff options
Diffstat (limited to 'db/post_migrate/20170324160416_migrate_user_activities_to_users_last_activity_on.rb')
-rw-r--r-- | db/post_migrate/20170324160416_migrate_user_activities_to_users_last_activity_on.rb | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/db/post_migrate/20170324160416_migrate_user_activities_to_users_last_activity_on.rb b/db/post_migrate/20170324160416_migrate_user_activities_to_users_last_activity_on.rb new file mode 100644 index 00000000000..9ad36482c8a --- /dev/null +++ b/db/post_migrate/20170324160416_migrate_user_activities_to_users_last_activity_on.rb @@ -0,0 +1,87 @@ +class MigrateUserActivitiesToUsersLastActivityOn < ActiveRecord::Migration + include Gitlab::Database::MigrationHelpers + + disable_ddl_transaction! + + DOWNTIME = false + USER_ACTIVITY_SET_KEY = 'user/activities'.freeze + ACTIVITIES_PER_PAGE = 100 + TIME_WHEN_ACTIVITY_SET_WAS_INTRODUCED = Time.utc(2016, 12, 1) + + def up + return if activities_count(TIME_WHEN_ACTIVITY_SET_WAS_INTRODUCED, Time.now).zero? + + day = Time.at(activities(TIME_WHEN_ACTIVITY_SET_WAS_INTRODUCED, Time.now).first.second) + + transaction do + while day <= Time.now.utc.tomorrow + persist_last_activity_on(day: day) + day = day.tomorrow + end + end + end + + def down + # This ensures we don't lock all users for the duration of the migration. + update_column_in_batches(:users, :last_activity_on, nil) do |table, query| + query.where(table[:last_activity_on].not_eq(nil)) + end + end + + private + + def persist_last_activity_on(day:, page: 1) + activities_count = activities_count(day.at_beginning_of_day, day.at_end_of_day) + + return if activities_count.zero? + + activities = activities(day.at_beginning_of_day, day.at_end_of_day, page: page) + + update_sql = + Arel::UpdateManager.new(ActiveRecord::Base). + table(users_table). + set(users_table[:last_activity_on] => day.to_date). + where(users_table[:username].in(activities.map(&:first))). + to_sql + + connection.exec_update(update_sql, self.class.name, []) + + unless last_page?(page, activities_count) + persist_last_activity_on(day: day, page: page + 1) + end + end + + def users_table + @users_table ||= Arel::Table.new(:users) + end + + def activities(from, to, page: 1) + Gitlab::Redis.with do |redis| + redis.zrangebyscore(USER_ACTIVITY_SET_KEY, from.to_i, to.to_i, + with_scores: true, + limit: limit(page)) + end + end + + def activities_count(from, to) + Gitlab::Redis.with do |redis| + redis.zcount(USER_ACTIVITY_SET_KEY, from.to_i, to.to_i) + end + end + + def limit(page) + [offset(page), ACTIVITIES_PER_PAGE] + end + + def total_pages(count) + (count.to_f / ACTIVITIES_PER_PAGE).ceil + end + + def last_page?(page, count) + page >= total_pages(count) + end + + def offset(page) + (page - 1) * ACTIVITIES_PER_PAGE + end +end |