Problem

You would like to know at any moment the status of your migrations, if they have been applied, rolled back etc.

Solution

There is a very usefull rake task that can give you the list of your migrations withouth having to look at your schema.rb file:

rake db:migrate:status

Status   Migration ID    Migration Name
--------------------------------------------------
   up     20140528102449  Create products
   up     20140613150126  Create carts
   up     20140613151119  Create line items
   up     20140617215027  Add quantity to line items
   up     20140617220031  Combine items in cart
   up     20140620131542  Create orders
   up     20140620131605  Add order to line item