I need to query over a table mapped to class T,
I usually use session.query (T), however I am using two cte's
part0 = ... cte('part0')
part1 = ... cte('part1')
part2 =
... cte('aprt2')
allparts =
union (part1.select(), part2.select())
session.query (allparts) .. returns row record but I need it to return
objects of type T?
I have tried using q1 = session.query(T).from_statement (allnodes)
which appears to convert and create objects of T, However,
I cannot filter or order_by
I have tried using the sql epxression level:
n = allparts.alias()
DBSession.query (T).from_statement (select ([n]).where (...).order_by
(...)).all()
or
DBSession.query(T).from_statement(DBSession.query
(n).filter(...).order_by(...).statement).
but I get NoSuchColumnError: "Could not locate column in row for column
'T.id'"
Is there a way to let SA know how map the columns of the select expression
to an object?
Thanks.
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