In Rails, what is the best way to update a record or create a new one if it doesn't exist?

Question

I have a create statement for some models, but it’s creating a record within a join table regardless of whether the record already exists.

Here is what my code looks

Answer 1

Also, in Rails 3 you can do:

@user.choices.where(:user => @user.id, :interest => interest, :score => 4).first_or_create