Adding a Like Button which doesn't require User Model

I'm trying to add a like button to my rails site so I've looked at the acts_as_votable gem and the Active Record Reputation System gem. However, both of these require a User Model (I think), and I want to make the like button something that anyone can click whether they are signed in or not.

Is there a way to make one of these gems function like that, or will I have to create the voting system from scratch? Also, if I do have to do it from scratch, some guidelines to approaching it would be helpful.

I'd create another model called Like and then create a one to many association between Image and Like.

rails g resource Like image_id:integer

then update your database by running

rake db:migrate

then you'll want to create the association.

# like.rb
class Like < ActiveRecord::Base
  belongs_to :image
end

# image.rb
class Image < ActiveRecord::Base
   has_many :likes
end

Then when someone clicks on the like button, you'll want to create a new Like with the id of the Image

I hope this helps.