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List:       zope3-users
Subject:    Re: [Zope3-Users] sqlalchemy and FieldProperty
From:       Darryl Cousins <darryl () darrylcousins ! net ! nz>
Date:       2008-01-27 20:31:45
Message-ID: 1201465905.5110.6.camel () localhost ! localdomain
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On Sun, 2008-01-27 at 13:03 -0500, Stephan Richter wrote:
> On Friday 21 December 2007, Darryl Cousins wrote:
> > I find that when I map a class to a table I lose the auto-magic
> > vaidation provided by FieldProperty when setting attributes.
> 
> I bet you that sqlalchemy does some evil class hacking. Actually, I gotta 
> check this out. :-) Yeah, from looking at the mapper.py module, I can see 
> that really weird things happen there. They overwrite attributes left and 
> right. Man, I love persistent! I wish they would have used it as a base for 
> their work.

Hi Stephan,

Thanks for your comment.

Just yesterday I was looking at a couple of external sqlalchemy
projects: Elixir [1] and sqlalchemy-validations [2]. I only had a brief
look through the code but the way sqlalchemy-validations hooks itself
into Elixir seemed point to a way to hook zope fieldproperty in there.
Maybe. ;-)

[1] http://elixir.ematia.de/trac/
[2] http://code.google.com/p/sqlalchemy-validations/

Regards,
Darryl

> 
> Regards,
> Stephan

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