get_primary_key

# File activerecord/lib/active_record/attribute_methods/primary_key.rb, line 25
        def get_primary_key(base_name) #:nodoc:
          key = 'id'
          case primary_key_prefix_type
            when :table_name
              key = base_name.to_s.foreign_key(false)
            when :table_name_with_underscore
              key = base_name.to_s.foreign_key
          end
          key
        end