Complex JOIN with ActiveRecord and Rails 3

Question

I have the following models:

class User < ActiveRecord::Base
  has_many :memberships
  has_many :groups, :through => :memberships
end

class Group < Act         


        

Answer 1

something like this should work for you, although it requires mixing in a little raw SQL

Post
  .joins("INNER JOIN memberships ON memberships.group_id = posts.group_id")
  .where(:memberships => {:user_id => current_user.id})