[postmodern-devel] Error when no persistent field

[Sven Van Caekenberghe]

Hi Marijn,

On 21 Apr 2008, at 15:15, Marijn Haverbeke wrote:

> Hi Sven,
>
>> Thanks, did you also handle the case of using get-dao when there  
>> are no
>> keys defined ? I believe that got into a loop...
>
> It did -- though some rather bizarre corner case. I've pushed a fix to
> raise an error instead -- calling get-dao on key-less classes is not
> allowed.
>
> Regards,
> Marijn

I know, catching these newbie errors is not the real stuff. I now get:

P1 24 > (defclass foo () ())
#<STANDARD-CLASS FOO 21F6D767>

P1 25 > (get-dao 'foo)

Error: Class FOO has no key slots.
  1 (abort) Return to level 0.
  2 Return to top loop level 0.

Type :b for backtrace, :c <option number> to proceed,  or :? for other  
options

This is certainly correct and better than a loop. However, in the  
above transcript I even forgot to declare the proper meta class, maybe  
that should be the first error being reported. I know I am being  
annoying, but I am only trying to help; I promise I will never repeat  
this suggestion. Next time, I'll hopefully have a better request.

Sven