class Page < ActiveRecord::Base
has_many :left_page_associations, :foreign_key => :left_page_id,
:class_name => 'PageAssociation'
has_many :left_associations, :through => :left_page_associations,
:source => :right_page
has_many :right_page_associations, :foreign_key => :right_page_id,
:class_name => 'PageAssociation'
has_many :right_associations, :through => :right_page_associations,
:source => :left_page
def associations
(left_associations + right_associations).flatten.uniq
end
end
class PageAssociation < ActiveRecord::Base
belongs_to :left_page, :class_name => 'Page'
belongs_to :right_page, :class_name => 'Page'
end
class Page < ActiveRecord::Base
has_many :left_page_associations, :foreign_key => :left_page_id,
:class_name => 'PageAssociation'
has_many :left_associations, :through => :left_page_associations,
:source => :right_page
has_many :right_page_associations, :foreign_key => :right_page_id,
:class_name => 'PageAssociation'
has_many :right_associations, :through => :right_page_associations,
:source => :left_page
end
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