How do I get $near to work in Flask-mongoalchemy - python-3.x

Question

I have been trying to work on fetching events from my mongoDB database that are close to the current user's location
I have tried to reformat my Model scheme to contain [type: "Point"] and even arranged my longitude and latitude into a list.
I also tried adding "2dsphere" indexes using meta to my Model based on what I saw in mongo-alchemy documentation.
My Model
class Event(db.Document):
meta = {
'indexes': [
("*location.coordinates", "2dsphere")
]
}
user_id = db.StringField()
uuid = db.StringField()
name = db.StringField()
address = db.StringField()
start_time = db.DateTimeField(required=True, default=datetime.datetime.now())
end_time = db.DateTimeField(required=True, default=datetime.datetime.now())
location = db.DictField(db.AnythingField())
This is now my main query code
def get(self):
latitude = float(request.args.get('lat'))
longitude = float(request.args.get('long'))
print(longitude);
print(latitude);
event = Event.query.filter({"location" :
{ "$near" :
{
"$geometry" : {
"type" : "Point",
"coordinates" : [longitude, latitude] },
"$maxDistance" : 4000
}
}
}).first()
print(event);
[2019-01-15 23:20:59,797] ERROR in app: Exception on /v1/event [GET]
Traceback (most recent call last):
File "/home/creative_joe/.local/lib/python3.5/site-packages/flask/app.py", line 1813, in full_dispatch_request
rv = self.dispatch_request()
File "/home/creative_joe/.local/lib/python3.5/site-packages/flask/app.py", line 1799, in dispatch_request
return self.view_functionsrule.endpoint
File "/home/creative_joe/.local/lib/python3.5/site-packages/flask_restplus/api.py", line 325, in wrapper
resp = resource(*args, **kwargs)
File "/home/creative_joe/.local/lib/python3.5/site-packages/flask/views.py", line 88, in view
return self.dispatch_request(*args, **kwargs)
File "/home/creative_joe/.local/lib/python3.5/site-packages/flask_restplus/resource.py", line 44, in dispatch_request
resp = meth(*args, **kwargs)
File "/media/creative_joe/3004586c-9a2d-4cb0-8a5f-d41fe99afc05/home/creative_joe/MonkeyMusic.server/app/views/main.py", line 323, in get
"$maxDistance" : 4000
File "/home/creative_joe/.local/lib/python3.5/site-packages/mongoalchemy/query.py", line 139, in first
for doc in iter(self):
File "/home/creative_joe/.local/lib/python3.5/site-packages/mongoalchemy/query.py", line 412, in next
return self._next_internal()
File "/home/creative_joe/.local/lib/python3.5/site-packages/mongoalchemy/query.py", line 416, in _next_internal
value = next(self.cursor)
File "/home/creative_joe/.local/lib/python3.5/site-packages/mongoalchemy/py3compat.py", line 41, in next
return it.next()
File "/home/creative_joe/.local/lib/python3.5/site-packages/pymongo/cursor.py", line 1189, in next
if len(self.__data) or self._refresh():
File "/home/creative_joe/.local/lib/python3.5/site-packages/pymongo/cursor.py", line 1104, in _refresh
self.__send_message(q)
File "/home/creative_joe/.local/lib/python3.5/site-packages/pymongo/cursor.py", line 982, in __send_message
helpers._check_command_response(first)
File "/home/creative_joe/.local/lib/python3.5/site-packages/pymongo/helpers.py", line 155, in _check_command_response
raise OperationFailure(msg % errmsg, code, response)
pymongo.errors.OperationFailure: error processing query: ns=heroku_c9gg06k0.EventTree: GEONEAR field=location maxdist=4000 isNearSphere=0
Sort: {}
Proj: {}
planner returned error: unable to find index for $geoNear query