问题
How to define GeoPointField() in elasticsearch django. It shows a serialization error when i am trying to save the instance. i am using library "django_elasticsearch_dsl code:
from django_elasticsearch_dsl.fields import GeoPointField
geolocation = GeoPointField()
when i am trying to save the data
user = GutitUser.objects.get(phone_number=phone_number)
lat, lon = get_lat_long()
user.geolocation.lat = lat
user.geolocation.lon = lon
user.save()
it shows error:
"Unable to serialize <django_google_maps.fields.GeoPt object at 0x7f5ac2daea90>
(type: <class 'django_google_maps.fields.GeoPt'>
get_lat_long method
def get_lat_long(request):
ip = json.loads(requests.get('https://api.ipify.org?format=json').text)['ip']
lat, lon = GeoIP().lat_lon(ip)
return lat, lon
回答1:
The problem is that django_elasticsearch_dsl (and further, elasticsearch_dsl) doesn't know how to serialize that custom django_google_maps.fields.GeoPt object into a format understood by Elasticsearch.
Quoting the docs, the object will need to have a to_dict() method.
The serializer we use will also allow you to serialize your own objects - just define a
to_dict()method on your objects and it will automatically be called when serializing to json.
You should be able to monkey-patch that method in with something like (dry-coded)
from django_google_maps.fields import GeoPt
GeoPt.to_dict = lambda self: {'lat': self.lat, 'lon': self.lon}
early in your app's code (an AppConfig ready() method is a good choice, or failing that, a models.py, for instance)
回答2:
The issue is that get_lat_long() returns an object of type django_google_maps.fields.GeoPt and you cannot assign is to your geolocation object. But modifying the code like below might do the trick:
user = GutitUser.objects.get(phone_number=phone_number)
geo_point = get_lat_long()
user.geolocation.lat = geo_point.lat
user.geolocation.lon = geo_point.lon
user.save()
来源：https://stackoverflow.com/questions/50617543/how-to-serialize-django-geopt-for-elasticsearch