Hi,
I am working my way through the book, and have just completed iteration A4. I can load the index page with no problem, but when I click the link to create a new product I get the following error:

NoMethodError in Products#new

Showing layouts/products.html.erb where line #16 raised:

You have a nil object when you didn’t expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.each

Extracted source (around line #16):

13:

Listing products

I also get similar errors when using the other links on the page. Any idea what is causing this?

The lines you quoted look like they are from app/views/products/index.html.erb and not from app/views/layouts/products.html.erb

By any chance, did some of these lines get added (appended?) to the end of the layout? Check both files against the links provided above.

You hit it right on the nose. I must have pasted into the wrong file. Thanks!