friendly_id and real id

问题

Is there any way to get the real id column from a model that is modified with friendly_id?

I don`t want to make another db query for it, in performance reasons.

回答1:

Broadly speaking friendly_id modifies to_param and find methods. Next should work:

@affiche = Affiche.find(params[:id]) # params[:id] is a slug
@id = @affiche.id

回答2:

Have you tried attributes["id"]? e.g: Model.first.attributes["id"]

来源：https://stackoverflow.com/questions/7944908/friendly-id-and-real-id