Thanks for the heads up. It wouldn't work since I'm doing server side authorization, but definitely shouldn't display.
Love it! I actually just completed this functionality on a v2 of my personal finance application.
Not really since it isn't being used elsewhere in the class. Keep in mind that the memorization is only valid for the lifecycle of the request and any further requests would no longer have the calculations stored.
It should be user_signed_in?, not user_signed_in.
What error are you receiving?