How $geoNear chooses the field of the model to find the coordenates in MongoDB? - mongodb

Question

I'm using mongoose and I'm trying to get activities from the schema 'Activity' with an specific filter using $geoNear, but it always returns an empty array and I think it's because the aggregate function is not finding the coordenates of my model.
This is an example of the JSON to send:
{
"coordinates": {
"lat": 37.3890924,
"lon": -5.984458899999936
},
"distance": 100000000
}
This is the query:
Activity.aggregate([
{ $geoNear: {
near: {
type: "Point",
coordinates: [req.body.coordinates.lon, req.body.coordinates.lat]
},
maxDistance: req.body.distance * 1000,
spherical: true,
distanceField: "distance"
}
}
])
And this is the schema, where the coordinates are into the field 'meetingPoint':
const mongoose = require('mongoose');
const mongoosePaginate = require('mongoose-paginate');
const Schema = mongoose.Schema;
var ActivitySchema = Schema({
title: {type: String, require: true },
meetingPoint: {
meet_name:{type: String, require: true },
coordinates: {
lat: {type: Number, require: true },
lon: {type: Number, require: true }
}
},
date: {type: Date, require: true },
car: Boolean,
sites: {type: Number, min: 0 },
price: {type: Number, min: 0.0, require: true },
description: String,
eventTime: String,
event: Boolean,
sport: {type: Schema.Types.ObjectId, ref: 'Sport', require: true },
owner: {type: Schema.Types.ObjectId, ref: 'User', require: true },
attenders: [{type: Schema.Types.ObjectId, ref: 'User'}],
comments: [{type: Schema.Types.ObjectId, ref: 'Comment'}],
ratings: [{
rating:{type: Number},
user: {type: Schema.Types.ObjectId, ref:'User'}
}],
creationDate: {type: Date, default: Date.now, require: true },
updateDate: {type: Date, default: Date.now, require: true },
public: Boolean,
image: String
});
ActivitySchema.plugin(mongoosePaginate);
ActivitySchema.index({location: "2dsphere"});
module.exports = mongoose.model('Activity', ActivitySchema);
EDIT: I changed the coordinates in mongoose schema to the GeoJSON format(I think) and now they look like this:
meetingPoint: {
meet_name:{type: String, require: true },
coordinates: {
type: String,
coordinates: []
}
}
But the result is the same.
EDIT2: I also updated the existing data in the collection according to the meetingPoint with the pertinent format. This is an example:
"_id" : ObjectId("5ac36a2aasdsd3242b"),
"meetingPoint" : { "meet_name" : "Av. de Menéndez Pelayo, 76, 41030 Madrid, España", "coordinates" : { "type" : "Point", "coordinates" : [ -5.984458899
9936, 37.3890924 ] } },
"attenders" :....
But I still receive no activities with the filter.