How do I update a record using update_attribute?

Analogy: the update attribute method is like a guy who works in a warehouse who can be interrupted and will do something as long as you are only asking him to do 'just one small thing.'  A record is a shelf in the warehouse, and an attribute is a box on the shelf.  If you tell the warehouse guy to put one new thing in that one box on that one shelf, he can and will do it!
How do I change all of my specs to accomidate a change in migrations?

Analogy: making a change in the database is like a cold front breaking all of the pipes in a sewer system.  All of my tests broke at once.

I mass fixed them with the subl find and replace command.  It is

   cmd-shift f

In other words, it is annoyingly difficult to remember.
How do I add a new attribute to a model?

Can be redefined as how do I add a new setting to my databae?
Adding a new column to a model is like adding a new box to a shelf. It's a new place to stick something.