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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