8.2, problems adding products to cart

In 8.2, I was following through doing fine until I came to the point where I added the add_to_cart method in store_controller.rb and tried to test it. When I click on an “Add to Cart” button in the store, I get the following error:

NameError in StoreController#add_to_cart
uninitialized constant StoreController::Cart

I am sure it’s something obvious, but I can’t figure it out.

Any suggestions where I should be looking?

Thanks,
—Joe

I knew it would be something stupid. The file cart.rb was named “cart.db” I kept looking at the contents of the file, but not the filename itself. Heh…