The book provides this survey_live.ex code, which calls Catalog.list_products_with_user_rating:
defp list_products(user) do
Catalog.list_products_with_user_rating(user)
end
The compiler warns:
warning: Catalog.list_products_with_user_rating/1 is undefined (module Catalog is not available or is yet to be defined)
lib/pento_web/live/survey_live.ex:27: PentoWeb.SurveyLive.list_products/1
The problem can be fixed by adding an alias:
alias Pento.Catalog