Do ActiveRecord locks have to occur inside a transaction?

Question

Do ActiveRecord locks only work when they are inside of a transaction? If I open up two rails consoles and find a record then call lock! on that record I can still access the record from the other console.

Answer 1

According to the docs, lock! does not include a transaction. with_lock does, though, and should prevents you from writing to (but not reading from) the locked record.