Multiple relations to the same model in Rails

gistfile1.rb

# Model User:

has_many :questions
has_many :comments
# Questions to which the user is an expert a.k.a. 'questions to me'
has_many :experts, :dependent => :destroy
has_many :questionstome, :through => :experts, :source => :question

# This allows you to do things like this:
# u = User.first
# u.questions.all # lists all questions asked by the user
# u.questionstome.all # lists all questions to which someone made me an expert