Top "Update-all" questions

How to update all when you need callbacks fired?

Let's say I've got 15 user ids in an array called user_ids. If I want to, say, change all of …

ruby-on-rails ruby-on-rails-3 activerecord callback update-all
How to use update all, when all records are different?

How can I use update_all, if I want to update a column of 300,000 records all with a variety of …

ruby-on-rails-3 activerecord bulk update-all