On Apr 15, 2010, at 11:35 AM, Michael Brickenstein wrote:
> Hi!
>
> Thanks for your very prompt
> answer.
> Unluckily, my mails were a little bit unprecise:
>
> So, I wondered why the following happened:
>
> prop = get_mapper(Participation).get_property('remark')
>
> c=prop.columns[0]
>
> c
> Column(u'remark', PGText(length=None, convert_unicode=False,
> assert_unicode=None), table=<%(188392684 participation)s>, nullable=False)
this column is against an alias, which suggests you've mapped to an alias() or
select() of some kind. To get at full table metadata you need to be talking
to Column objects that are directly present on a Table.
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