Ruby on rails - Reference the same model twice?

Ruby on rails - Reference the same model twice?

ruby-on-rails rails-activerecord relationship

ruby-on-rails

Add record to a has_and_belongs_to_many relationship

ruby-on-rails has-and-belongs-to-many relationship

ruby-on-rails

What inverse_of does mean in mongoid?

ruby-on-rails associations mongoid relationship

ruby-on-rails

Rails, how to avoid the "N + 1" queries for the totals (count, size, counter_cache) in associations?

ruby-on-rails ruby ruby-on-rails-4 activerecord relationship

ruby-on-rails

Could not find the source association(s) :followed_id in model relationship in Rails 3.2

ruby-on-rails associations relationship railstutorial.org

ruby-on-rails