nodejs - Mongoose 5.3.8 - GeoJSON queries not working

Question

I am attempting to store and query locations based on coordinate points with Mongoose 5.3.8 in order to return points within the radius of another point. I have read the docs and have implemented the pointSchema + citySchema example in the section: Using GeoJSON data seen below

const pointSchema = new mongoose.Schema({
  type: {
    type: String,
    enum: ['Point'],
    required: true
  },
  coordinates: {
    type: [Number],
    required: true
  }
});

const citySchema = new mongoose.Schema({
  name: String,
  location: {
    type: pointSchema,
    required: true
  }
});

with an express endpoint, I query an mLab instance with the following code and a document stored as:

DOCUMENT ---------------------------

{
    "_id": "5bdbeb78949541086880dd35",
    "name": "Location1",
    "location": {
        "coordinates": [
            48.5,
            -123.8
        ],
        "_id": "5bdbeb78949541086880dd36",
        "type": "Point"
    }
}

QUERY --------------------------------

Location.findOne({
   location: {
     $near: {
       $geometry: {
          type: "Point" ,
          coordinates: coordinates // [long, latt]
       },
       $maxDistance: 10000,
       $minDistance: 1
     }
    }
  }).then(res => console.log(res))
    .catch(err => console.log(err))

---

The above query caught the error:

 planner returned error: unable to find index for $geoNear query

I attempted to add an index on the LocationSchema by calling .index()

LocationSchema.index({ "location": "2dsphere" });

I also attempted to add an index to the Schema by:

LocationSchema.index({ category: 1, location: "2dsphere" });

no index was created on the schema and the error persisted.

---

I have attempted several other Schema/Query combinations including:

1. Mongoose geospatial search: distance not working - Feb 7, 2016
2. Mongoose Geospatial Queries with $near - April 10, 2018
3. unable to find index for $geoNear query #6549 - May 31, 2018
4. Net Ninja's GeoJSON tutorial - March 27, 2017

---

I have gotten none of them to return points within the radius of another point despite using nearby coordinates to query. I don't understand where this is going wrong.

• Is there a working example of a geospatial query that can return points within the radius of another point in mongoose 5.3.8?

edit: clarified question

EDIT:

Got it to work. In the mongoose options connecting to the mLab instance my options were as followed:

    const mongoOptions = {
  useCreateIndex: true,
  useNewUrlParser: true,
  autoIndex: false,
  reconnectTries: Number.MAX_VALUE,
  reconnectInterval: 500,
  poolSize: 10,
  bufferMaxEntries: 0
};

The autoIndex: false parameter made it so that no new indexes could be created, even when specifying LocationSchema.index({ "location": "2dsphere" });. To fix this I had to add LocationSchema.options.autoIndex = true; for some reason. Hope this might help someone.