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

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