Centroid of PolygonField

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Centroid of PolygonField

I have the following model:

from django.contrib.gis.db import models as g

class Neighborhoods(Model):

    area = g.PolygonField()
    def point(self):
        #TODO:something better than this horrible hack of 2 db round trip

How do I calculate point() without a 2nd roundtrip to the db?

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