vendor/gems/composite_primary_keys-2.2.2/lib/composite_primary_keys/reflection.rb

   1 module ActiveRecord\r
   2   module Reflection\r
   3     class AssociationReflection\r
   4       def primary_key_name\r
   5         return @primary_key_name if @primary_key_name\r
   6         case\r
   7           when macro == :belongs_to\r
   8             @primary_key_name = options[:foreign_key] || class_name.foreign_key\r
   9           when options[:as]\r
  10             @primary_key_name = options[:foreign_key] || "#{options[:as]}_id"\r
  11           else\r
  12             @primary_key_name = options[:foreign_key] || active_record.name.foreign_key\r
  13         end\r
  14         @primary_key_name = @primary_key_name.to_composite_keys.to_s if @primary_key_name.is_a? Array\r
  15         @primary_key_name\r
  16       end\r
  17     end\r
  18   end\r
  19 end