Thanks for the reply! However, it says 'Use with care as it is easy to
shoot oneself in the foot when overriding columns.' without clarifying
much about it. Any particular pitfalls I should be aware of? I'm a
complete Elixir\SQLA newbie.

On Jun 24, 10:33 pm, Andreas Kaiser <[email protected]> wrote:
> Am 24.06.2011 um 14:47 schrieb AlexVhr:
>
>
>
>
>
> > class Document(EntityBase):
>
> >    __metaclass__ = EntityMeta
> >    doc_number = Field(Unicode(5),index=True)
>
> > class Order(Document):
> >    pass
>
> > class Invoice(Document):
> >    doc_number = Field(Unicode(10),index=True)  #this type of
> > documents needs a longer number field
>
> > The result is:
>
> > "File "C:\Python27\Lib\site-packages\elixir-0.7.1-py2.7.egg\elixir
> > \entity.py", line 493, in add_column
> >    (col.key, self.entity.__name__))
> > Exception: Column 'doc_number' already exist in 'Invoice' ! "
>
> > I know I could move 'doc_number' from inside the Document() and into
> > the Invoice() (and into Order() and so on...), but that kinda defeats
> > the encapsulation idea - Document() contains some common
> > functionality, that relies on 'doc_number' being present. Is there a
> > way around this?
>
> "allowcoloverride" might be what you're looking 
> for:http://elixir.ematia.de/apidocs/elixir.options.html
>
> HTH,
>
> Andreas

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