Query with GeoDjango

Hello all. I'm wondering how to resolve this problem with a GeoDjango.This are my models:

from django.db import models

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

from django.contrib.gis.geos import Point

from django.contrib.gis.measure import D

class Place(geomodels.Model):

    name = models.CharField(max_length=50)

    point = geomodels.PointField(null=True)

    objects = geomodels.GeoManager()

    def __unicode__(self):

        return u"%s the place" % self.name

class Restaurant(models.Model):

    place = models.OneToOneField(Place, primary_key=True)

    serves_hot_dogs = models.BooleanField()

    serves_pizza = models.BooleanField()

    def __unicode__(self):

        return u"%s the restaurant" % self.place.name

    

How can I get all Restaurants that serve pizza in a radio of 45km of a given (geolocation) point?

I'm trying something like:

pnt = Point(-34.5875015259, -58.6725006104)

Restaurant.objects.all().filter(place__point__distance_lte=(pnt, D(km=45)))

But it's not working:

Join on field 'point' not permitted. Did you misspell 'distance_lte' for the lookup type?

Any ideas?

Thanks in advance.

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