Rails 7 need to add

[jjmountain]

Thanks for this!

In order to make this work in rails API mode you need to enable session management in middleware as stated in the RoR Guide here.

# This also configures session_options for use below
config.session_store :cookie_store, key: '_interslice_session'

# Required for all session management (regardless of session_store)
config.middleware.use ActionDispatch::Cookies

config.middleware.use config.session_store, config.session_options