Using find() with geospatial coordinates in Mongoose (NodeJS+MongoDB)

Question

Mongoose version: 3.6 Node version: 0.10 I have been trying to solve this problem for hours. I want to find all the documents closer than maxDistance to some coordinates. I am trying to use the GeoJSON specifications of MongoDB (2dsphere), so that I can input the distance in meters. This is my schema "venue.js": ``` var db = require('mongoose'), Schema = db.Schema, ObjectId = Schema.ObjectId; var venueSchema = new Schema({ geo: { type: [Number], index: '2dsphere'}, city: String, name: String, address: String }); module.exports = db.model('Venue', venueSchema); ``` This is where I insert the query ctrlVenue.js: ``` var Venue = require('../models/venue.js'); VenueController = function(){}; /** GET venues list ordered by the distance from a "geo" parameter. Endpoint: /venues Params: - geo: center for the list of venues - longitude, latitude (default: 25.466667,65.016667 - Oulu); - maxDistance: maxímum distance from the center for the list of venues (default: 0.09) **/ exports.getVenues =…

Accepted Answer

I had to use the `Mixed` type and added some custom validation to ensure values were arrays and had a length of 2. I also checked for empty arrays and converted them to `null`s because this is required when using sparse indices with `2dsphere`. (Mongoose helpfully sets array fields to [] for you, which is not a valid coordinate!)

```
var schema = new mongoose.Schema({
  location: { type: {}, index: '2dsphere', sparse: true }
});

schema.pre('save', function (next) {
  var value = that.get('location');

if (value === null) return next();
  if (value === undefined) return next();
  if (!Array.isArray(value)) return next(new Error('Coordinates must be an array'));
  if (value.length === 0) return that.set(path, undefined);
  if (value.length !== 2) return next(new Error('Coordinates should be of length 2'))

next();
});
```

Using find() with geospatial coordinates in Mongoose (NodeJS+MongoDB)

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