> Such a transformation is fine. I found that my Django has no F().
> Checking the Django doc I saw that this new feature is "New in Django
> Development version".
>
> So I have to wait for the new version? Are there any other ways to
> create such a filter?
>> col1_value >= col2_value * 2
>>
>> something like col1__gte=F('col2') * 2
You can always fall back to the .extra() method[1]:
results = MyFoo.objects.extra(where=[
"col1_value >= col2_value * 2",
])
which is how it was done back in the day before ya'll young
whippersnappers had such fancy shenanigans as F() objects...and
to get data, we walked up hill, in the snow. Both ways. ;-)
-tim
[1]
http://docs.djangoproject.com/en/dev/ref/models/querysets/#extra-select-none-where-none-params-none-tables-none-order-by-none-select-params-none
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