On Sat, Aug 29, 2009 at 7:51 PM,
ckar...@googlemail.com<ckar...@googlemail.com> wrote:
>
> Really no ideas?
>
> Chris
>

Is there any way you could define a stable ordering for the
SinglePoint model? You could ensure that the "smaller" SinglePoint
gets stored in p1 and the "bigger" SinglePoint in p2 in a custom save
method.

If that isn't an option, you might want to implement a check in your
save method. I don't know how you could implement a database UNIQUE
index which would reject reversed relationships.


Matthias


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