Hi Chris,
The short answer is that I want to dynamically create classes/tables
and I want to implement multiple inheritance (simplified version: just
data and no overrides => no diamond problem), so I need some extra
work like a extra tables for polymorphism. I think it would be most
elegant to do this with metaclasses, but I am just experimenting until
now. I will look at the mixin classes chapter though; I have some more
challenges ... The long answer (when i get it to work) might come
later.
Cheers, Lars
On Mar 20, 8:33 pm, Chris Withers <ch...@simplistix.co.uk> wrote:
> On 19/03/2011 10:27, farcat wrote:
>
> > OK, dumb error, move Base.metadata.create_all(engine) below table1 =
> > tablemeta("table1") and it works.
>
> > This works when I create the columns via the temp dict in __new__ not
> > when I do so in __init__ (it complains about missing __tabledata__),
> > but why?
>
> I'd strongly suggest reading the section on Mixin classes rather than
> doing stuff with Metaclasses:
>
> http://www.sqlalchemy.org/docs/orm/extensions/declarative.html?highli...
>
> If you *still* feel you need to use metaclasses after that, please let
> us know why! ;-)
>
> Chris
>
> --
> Simplistix - Content Management, Batch Processing & Python Consulting
> -http://www.simplistix.co.uk
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