If I had this error, I'd guess that I don't have the attribute "body"
in my "responses" table. Though, I don't know the particulars of your
setup, so it could be many things.

However, please note that scaffolding is not the preferred way to learn
Rails. And, secondly, there is a rails dedicated group that is probably
a better place for rails questions.

But, anyhow, goodluck with it!

-hampton.