Thanks everyone for all the help, it seems to be working now that I'm
using explicit sessions rather then the threaded one I had been using
Jose

Jose Galvez wrote:
> Dear sqlalchemy users, I'm pretty new to sqlalchemy and I've run into a
> problem that I cant seem to figure out.  Here is what I cant to do, I
> have a table, wiith xml data in it.  What I want to do is try and look
> up an entry in the table, and if I don't find it, add a new entry into
> the database with the default xml data in it.  I thought I could do it
> this way:
>
>             uin = dbsession.query(model.Wsi).get_by(uin=image)
>             if uin:
>                 xml = uin.xml
>             else:
>                 uin=model.Wsi()
>                 uin.uin=image
>                 xml = '<ZAS></ZAS>'
>                 uin.xml = xml
>                 dbsession.flush()
>                 dbsession.save(uin)
>
> however when I do this I get an error saying the Wsi is already
> associated with an other session (InvalidRequestError: Object
> '<wsi.models.Wsi object at 0x016DE950>' is already attached to session
> '23980720' (this is '23998864')).  I believe its the session that was
> created with the first query, but I'm not sure how to recover that
> session to use it rather then the one that I must be creating.  Any and
> all help would be great
>
> Jose
>
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