On Nov 8, 2010, at 1:16 PM, Adrian wrote:
> Hi all,
>
> This is a topic that has been discussed before, but I haven't been
> able to successfully implement any of the proposed solutions in my own
> code. I've created a few Views in my postgres database, and I'm
> looking for a way to simply query them from sqlalchemy. I tried just
> treating them as tables, but this failed when the mapper wasn't able
> to find a primary key (makes sense).
>
> The code I tried was just a naive attempt:
>
> class SpectrumView(object):
> pass
>
> spectrum_view = Table('spectrum_view', metadata, autoload=True)
> mapper(SpectrumView, spectrum_view)
>
> So I read in some message that it might be possible to specify a
> primary key to the mapper, like
> mapper(SpectrumView, spectrum_view, primary_key=[..]), but the problem
> is I'm not defining my tables in python - they are already created, so
> I don't have any column objects to pass to primary_key.
>
> Anyway, I'm just curious to see if anyone has had success with an
> implementation of database views in sqlalchemy, and possibly examples
> of those cases.
Views are reflectable, so you can reflect the view, then add the primary key to
the proper column in the metadata.
Cheers,
M
--
You received this message because you are subscribed to the Google Groups
"sqlalchemy" group.
To post to this group, send email to sqlalch...@googlegroups.com.
To unsubscribe from this group, send email to
sqlalchemy+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/sqlalchemy?hl=en.
