Re: [SQLObject] Unknown SQL builtin type error (multiple foreign keys)

[Ian B. <ia...@co...>]

On Thursday, September 25, 2003, at 05:18 PM, Luke Opperman wrote:
> The error happens during the second call to addColumn, and only if I 
> import
> StoryMotivation before Motivation (otherwise the rogue code below 
> never gets
> called due to how needSet works).
>
> addNeedSet snippet:
>         cls = findClass(setCls, registry=registry)
>         if callable(getattr(obj, attr, None)):
>             getattr(obj, attr)(cls)
>         else:
>             setattr(obj, attr, cls)
>
> I'm trying to understand the reason for trying to create an instance 
> of the
> class in the positive if statement. My code works if I comment that 
> out (ie,
> if obj.attr already exists, then pass, otherwise set it) or just 
> always set
> it. But ?

This is so that addNeedSet/setNeedSet allow both callbacks and 
attribute setting (callbacks being more general).  The particular 
problem here is already fixed in CVS.

   Ian