On May 8, 2013, at 3:24 PM, sajuptpm <[email protected]> wrote:
> Hi Michael Bayer,
>
> 1)
> I tried your suggestion, but it not updating the value of "type" column in
> the database.
> instance_of_B.__class__ = C_Class
> instance_of_B.type = "type_c"
>
> 2)
> * So, i tried like this, and it updating he value of "type" column in the
> database.
> * What you think?, is it a good way to solve this issue ?
the solution I gave requires SQLAlchemy 0.7 or greater. I'm now recalling
you said you're stuck on very old 0.5 versions, so yes, do whatever works.
>
> zope transaction begin
> Some DBSession query and add statements
>
> DBSession.execute("update my_table set type='%s' where id='%s';" %(new_type,
> id))
> DBSession.execute("commit;")
>
> Some DBSession query and add statements
> zope transaction commit
>
> Thanks,
>
>
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