there's a populate_existing() option which will lead to all the found
objects being repopulated, its not often used but you might try that.
ml wrote:
>
> Hi!
>
> Is it possible to force query to automatically expire instance's lazy
> attributes? And I mean instances that were queried and accessed before
> the "second" query?
>
> Example:
>
> mapper(MyObject, my_table, properties={
> "myattr": relation(ChildObject)
> })
>
> following code will lead in only 3 SELECTs (because the attribute will
> be in the identity map due to the first access)
>
> ... clean identity map ...
> obj = sess.query(MyObject).first()
> print obj.myattr
> obj = sess.query(MyObject).first()
> print obj.myattr # this will not do a new SELECT
>
> I don't want to do something like:
> objs = sess.query(MyObject).all()
> for obj in objs:
> sess.expire(obj, "myattr")
>
> Is there any query option so solve that or I have to use sess.expire?
>
> Thanks.
>
> David
>
> >
>
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