How to execute runCommand with Mongoose?

Question

I am using Node.js and Mongoose to access my MongoDB. I am using a model that stores some geo coordinates. I have them indexed and everything seems to work as expected. What I a

Answer 1

I don't think Mongoose supports runCommand right now. You would be better off using the geospatial options using the find method e.g. >

db.places.find( { location : { $near : [50,50] , $maxDistance : 300 } } )

Answer 2

YourModel.db.db.executeDbCommand({geoNear : "locations", near : [11.252,14.141], spherical: true }, function(err,res) { console.log(res.documents[0].results)});

node 0.6.6, mongoose@2.4.9, mongodb version v2.0.2

its a bit hacky and could change.

Answer 3

Hope this should work!! Referrence URL : http://mongoosejs.com/docs/api.html

// Legacy point

Model.geoNear([1,3], { maxDistance : 5, spherical : true }, function(err, results, stats) {
   console.log(results);
});

// geoJson

var point = { type : "Point", coordinates : [9,9] };
Model.geoNear(point, { maxDistance : 5, spherical : true }, function(err, results, stats) {
   console.log(results);
});

Answer 4

First of all there is not yet a convenience wrapper to use geoNear with Mongoose directly (given that you want to read the calculated distance).

But since Mongoose collections proxies all collection methods from the native MongoDB native driver you can just use their geoNear method, though you have to give up a little bit of convenience you might expect from Mongoose and in my findings the error handling was a little bit different.

Anyway, this is how you could use said API:

YourModel.collection.geoNear(lon, lat, {spherical: true, maxDistance: d}, function(err, docs) {
  if (docs.results.length == 1) {
    var distance = docs.results[0].dis;
    var match = docs.results[0].obj;
  }
});

Please refer to the docs for correct error handling and how to calculate the distances.