/app/models/app.rb
App < ActiveRecord::Base
belongs_to :appable, :polymorphic => true
end
/app/models/organization.rb
Organization < ActiveRecord::Base
has_and_belongs_to_many :founders, :class_name => 'Developer', :association_foreign_key => :founder_id, :join_table => 'founders_organizations'
has_and_belongs_to_many :collaborators, :class_name => 'Developer', :association_foreign_key => :collaborator_id, :join_table => 'collaborators_organizations'
has_many :apps, :as => :appable
# Other relationships
end
/app/models/developer.rb
Developer < ActiveRecord::Base
has_and_belongs_to_many :founded_organizations, :class_name => 'Organization', :foreign_key => :founder_id, :join_table => 'founders_organizations'
has_and_belongs_to_many :collaborated_organizations, :class_name => 'Organization', :foreign_key => :collaborator_id, :join_table => 'collaborators_organizations'
has_many :apps, :as => :appable
# Other relationships
end