hm i had not run my tests for quite a while.. this seems recent thing.
lets see if i can dig anything of help... nothing much, one side
works, another not at all.
one of my set of inheritance tests (direct over sa, A-B) is ok.
the other one (over dbcook) fails completely, even for A-B
inheritance. But they seem same as mapping... there's something
really subtle.
i either get a sort of decart product, or empty result.
and also i stepped on this:
File "sqlalchemy/orm/mapper.py", line 168, in __init__
self.with_polymorphic[1] = self.with_polymorphic[1].alias()
TypeError: 'tuple' object does not support item assignment
ciao
svil
On Wednesday 03 December 2008 11:06:24 Gaetan de Menten wrote:
> Hello all,
>
> I've been playing a bit with polymorphic concrete inheritance, and
> noticed that when you have several levels of "polymorphic" loading
> (ie my child class is also a parent class which I want to load
> polymorphically), the query for the top-level class includes the
> child polymorphic join while I don't see any reason to (its table
> is already contained in the parent join). See attached example.
>
> class A(object):
> ...
>
> class B(A):
> pass
>
> class C(B):
> pass
>
> The query ends up something like:
>
> SELECT [all_columns] FROM ([pjoin_abc]), ([pjoin_bc])
>
> Am I using it wrong, or is this a bug?
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