User Model 


					
		
		
has_many :discoverers,  :foreign_key => 'follower_id', 
                          :class_name => 'Friendship', 
                          :dependent => :destroy
has_many :followees,    :through => :discoverers
has_many :listeners,    :foreign_key => 'followee_id', 
                          :class_name => 'Friendship', 
                          :dependent => :destroy
has_many :followers,    :through => :listeners

has_many :discoveries

				
		

		

	
	





Friendship Model 





	
	

		

		

			
				
				

					
		
		
belongs_to :follower, :class_name => "User"
belongs_to :followee, :class_name => "User"
validates_uniqueness_of :follower_id, :scope => :followee_id

				
		

		

	
	





Discovery Model 





	
	

		

		

			
				
				

					
		
		
belongs_to :user

				
		

		

	
	





Discoveries Controller 





	
	

		

		

			
				
				

					
		
		
def index
    @discoveries = current_user.discoverer.discoveries.find(:all)
end