# File lib/active_record/attribute_methods/primary_key.rb, line 64
        def set_primary_key(value = nil, &block)
          @quoted_primary_key = nil
          @primary_key ||= ''
          self.original_primary_key = @primary_key
          value &&= value.to_s
          connection_pool.primary_keys[table_name] = value
          self.primary_key = block_given? ? instance_eval(&block) : value
        end