Many databases treat timestamp columns in a special way. For instance, the first Timestamp column in a table (or one with ON UPDATE CURRENT_TIMESTAMP set) is updated with the current timestamp on create and update, while other timestamp columns are left alone.
What is the default behavior of ActiveRecord with :timestamp columns? Are there options for specifying which columns should update automatically?
Does anyone have a link to a comprehensive description of each of the ActiveRecord column types?
I found a partial answer at http://rails.raaum.org/database-conventions.html#timestamps