django json serializer does not implement geojson [duplicate]

Answer 1

You need to write your own serializer. Just inherit from the DjangoJSONEncoder, here's one I created that supports the Point type:

from django.core.serializers.json import DjangoJSONEncoder
from django.contrib.gis.geos import Point

class GeoJSONEncoder(DjangoJSONEncoder):
    def default(self, obj):
        if isinstance(obj, Point):
            return obj.coords
        return super(GeoJSONEncoder, self).default(obj)

You can then use it like so:

from my_app.serializers import GeoJSONEncoder
from django.utils import simplejson

json = simplejson.dumps(data, cls=GeoJSONEncoder)