DRF GeometryField

fields.py

class GeometryExcpetion(Exception):
    pass


class GeometryField(serializers.Field):
    geom_type = None

    def __init__(self, *args, **kwargs):
        if not self.geom_type:
            raise GeometryException('You must declare a `geom_type` attribute on your field'
                                    'and assign a Geometry class to it')
        return super(GeometryField, self).__init__(args, kwargs)

    def to_representation(self, obj):
        raise ImproperlyConfigured('You need to define your own `to_representation` method')

    def to_internal_value(self, data):
        try:
            geom = GEOSGeometry(data)
            if GEOS_CLASSES[geom.geom_typeid] == self.geom_type:
                return data
            raise serializers.ValidationError(
                'Invalid geometry. {geom} required.'.format(geom=self.geom_type))
        except ValueError:
            raise serializers.ValidationError('Not a valid geometry')