inspect

# File activerecord/lib/active_record/core.rb, line 718
    def inspect
      # We check defined?(@attributes) not to issue warnings if the object is
      # allocated but not initialized.
      inspection = if defined?(@attributes) && @attributes
        attribute_names.filter_map do |name|
          if _has_attribute?(name)
            "#{name}: #{attribute_for_inspect(name)}"
          end
        end.join(", ")
      else
        "not initialized"
      end

      "#<#{self.class} #{inspection}>"
    end