Extract of an Attorney model (basically a Person)

attorney.rb

class Attorney < ActiveRecord::Base
  # Added :uniq qualifier, not without some strife.  First, in the Agile 1.2 dev book,
  # they incorrectly called the parameter ":unique".  Then, when you get a .count 
  # on this association (attorney.community_organizations.count), it returns the non-
  # unique count.  So, instead, to receive an accurate count that respects the :uniq
  # parameter, use .size, so attorney.community_organizations.size.  
  has_many :community_organizations, 
           :through => :affiliations, 
           :conditions => %{community_organization_type_id != #{CommunityOrganizationType::PROFESSIONAL_TYPE_ID}},
           :order => 'name',
           :uniq => true

  has_many :professional_organizations, 
           :through => :affiliations, 
           :source => :community_organization,
           :conditions => %{community_organization_type_id = #{CommunityOrganizationType::PROFESSIONAL_TYPE_ID}},
           :order => 'name',
           :uniq => true
           
end