Set geo_field serializer as PointField from another model - Django

Question

I have two models and you need to serialize Articleas Geojson by setting the attribute geo_fieldas pointfrom the model Location. After completing the proposed solution here, I get an error message:

Got AttributeError when attempting to get a value for field `point` on serializer `ArticleSerializer`.
The serializer field might be named incorrectly and not match any attribute or key on the `Article` instance.
Original exception text was: 'ManyRelatedManager' object has no attribute 'point'.

Here are my models:

class Location(models.Model):
    city = models.CharField(max_length=200)
    point = models.PointField(srid=4326)
    objects = models.GeoManager()

class Article(models.Model):
    locations = models.ManyToManyField(Location)
    article_title = models.CharField(max_length=200)

    @property
    def point(self):
    return self.locations.point

And my serializer:

class ArticleSerializer(GeoFeatureModelSerializer):
point = GeometryField()

class Meta:
    model = Article
    geo_field = "point"
    id_field = False
    fields = ('pub_date', 'point',)

Any help appreciated. I tried to find a solution for centuries with little success!

UPDATE!

Ok, something with that. I created LocationSerializerand reference this in ArticleSerializer. Now they look something like this:

class LocationSerializer(serializers.ModelSerializer):
    class Meta:
        model = Location
        geo_field = "point"
        id_field = False
        fields = ('point',)

class ArticleSerializer(GeoFeatureModelSerializer):
    locations = LocationSerializer(many=True)       
    class Meta:
        model = Article
        geo_field = "locations"
        id_field = False
        fields = ('pub_date', 'locations',)

The output is closer to what I want ... but still a bit unclear in the design:

{  
    "type":"FeatureCollection",
    "features":[  
        {  
            "type":"Feature",
            "geometry":[  
                {  
                    "point":{  
                        "type":"Point",
                        "coordinates":[  
                            -2.200337956118645,
                            53.48316423741371
                        ]
                    }
                },
                {  
                    "point":{  
                        "type":"Point",
                        "coordinates":[  
                            0.041198730463564,
                            51.51002453017606
                        ]
                    }
                }
            ],
            "properties":{  
                "pub_date":"2015-04-06T20:38:59Z"
            }
        }
    ]
}

UPDATE!

The format I need is:

{
    "type": "FeatureCollection",
    "features": [
        {
            "type": "Feature",
            "properties": {
                "time": "2013-01-22 08:42:26+01"
            },
            "geometry": {
                "type": "Point",
                "coordinates": [
                    7.582512743,
                    51.933292258,
                    1
                ]
            }
        },

Answer 1

, point Article self.locations, ManyToManyField. self.locations.point, self.locations ForeignKey, .

' ManyRelatedManager' 'point'.

, self.locations a ManyRelatedManager, a ManyToManyField. , ,

• locations be ForeignKey, , point .

• Article, point .

  return [location.point for location in self.locations]
  

, many=True GeometryField .

Answer 2

, ... , . , vectorformats.DjangoWStyle( google), geojson . , . ManyToManyField on Location, Article.