Background:
I'm trying to add photo uploads to an Advert model using Strong Params with the Paperclip gem, where Photo is a separate model which "has_attached_file" :upload, and I am calling forms_for (actually semantic_forms_for as I'm using Formtastic) in the Ads#new view to upload the image to the Photo instance. Params looks ok but I think I've missed something in the controller. Haven't been able to get it working despite multiple iterations of the controller code. What would I need to do differently to get it working? I'm trying to add photo uploads t
