On Mon, Apr 28, 2008 at 10:33 PM, Michael Bayer
<[EMAIL PROTECTED]> wrote:
> pjoin = polymorphic_union(...)
> pjoin2 = polymorphic_union(...)
>
> employee_mapper = mapper(Employee, pjoin, polymorphic_on=pjoin.c.type)
> manager_mapper = mapper(Manager, managers_table,
> inherits=employee_mapper, concrete=True, polymorphic_identity='manager')
> engineer_mapper = mapper(Engineer, engineers_table,
> with_polymorphic=('*', pjoin2),
> polymorphic_on=pjoin2.c.type,
> inherits=employee_mapper, concrete=True,
> polymorphic_identity='engineer')
> hacker_mapper = mapper(Hacker, hackers_table, inherits=engineer_mapper,
> concrete=True, polymorphic_identity='hacker')
This solves nicely my "multi-level" problem, thanks !
> this should in theory also fix the "engineers" relation on Company.
Doesn't seem to. Since I guess it's a bug, I've filed ticket 1018 for this.
http://www.sqlalchemy.org/trac/ticket/1018
> But as I've said many times (to svil, at least) concrete inheritance
> is something i havent gotten into much as of yet, largely due to the
> many inherent issues with it as well as its being a generally
> unpopular pattern, so there may still be issues with this setup (but
> let me know, since thats how it "should" work).
Ok, no worries.
> In any case the unit tests which you were working from (im guessing
> test/orm/inheritance/concrete.py) should be patched to include this
> test (i.e. including Hacker, the polymorphic load, as well as the
> relation).
I'll add the working "multi-level" test this afternoon. I guess you
don't want the relation part yet.
> Assuming it works we should also make sure the 0.5 branch
> (which isnt called that yet) can handle it too.
--
Gaëtan de Menten
http://openhex.org
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