On page 65, in a section under “Caching individual objects”, a code sample has the wrong file header.

You can refactor this in a superclass so that other presenters can use your
brand-new caching mechanism. Create a file in app/presenters/api/v1/presenter.rb
and extract the appropriate logic. You will also need to modify FilmPresenter.
The result for both files should look like the following:

# app/presenters/api/v1/film_presenter.rb

class Api::V1::Presenter
[…]

Note that the file path is listed as “[…]/file_presenter.rb”, but the class is “Presenter”. The FilmPresenter class follows in a subsequent block after this one.

Affected version: P1.0

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Thanks!