On Aug 23, 9:14 pm, Andrea Zilio <m.ep...@gmail.com> wrote:
> So the answer to the question "Can I get the right instances with one
> single and only DB query" seems to be:
> "No, you cannot do so without touching the Django orm code".
>
> Am I right?
Actually, I think the ORM's extensibility mechanisms are sufficient
that you could provide your QuerySet.select_subclasses() method, which
would perform a single query with n LEFT JOIN's, with custom QuerySet/
Query subclasses. Writing it would certainly require a non-trivial
level of familiarity with the ORM internals, and you might have to use
private APIs - but I don't think you'd have to modify Django code.
Carl
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