collateral damages when Cart is not only Cart

[Vaurien]

Hello,

Thanks for your gem :) I installed this and use my User model as Cart (why not ? :)).
But ! I don't know why, it work in development but not in production environment... Some standard function as "empty ?" didn't work anymore...

Please find some details on stackoverflow : http://stackoverflow.com/questions/29557476/cant-understand-blank-behaviour-on-rails-object

Hope it helps !

Thanks again for your work :)