Hello,
I would like to annotate a query with the following expression: ([Due Date] 
- [Now])/[Interval]. [Due Date] and [Interval] are fields from the 
database, while [Now] should be "equal" to timezone.now().

So this would look like:
.annotate(ratio=(F('due_date')-timezone.now())/F('Interval'))

but this does not work. Does someone know how the expression should be 
written (if it is indeed feasible with Django ORM)?

Thanks for your help!

Yoann

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