'How to make calculation inside django annotate?
This one when I run generates error:
qs = UserLocation.objects.annotate(distance=0.5 - cos((F('lat')-lat1)*p)/2 + cos(lat1*p) * cos(F('lat')*p) * (1-cos((F('long')-lon1)*p))/2).all()
The error it generates is this one:
must be real number, not CombinedExpression
How can I make that calculation as an annotation
Sources
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