Menachem says:

I didn’t find any pages to update. But I did remove the views/line_items directory, as it allows the user to interact with the line_items model directly

GreenDavidDude says:

I made the following changes to depot/app/models/product.rb:

validates :image_url,    :uniqueness => true
validates :price, :numericality => {:less_than_or_equal_to =>    1000}