I'm currently working on a geospatial query in mongodb using the $within operator. I have a collection entry with a location field containing:
location: {
bounds: {
south_west: { lat: XX.XXXXXX, lng: XX.XXXXX },
north_east: { lat: XX.XXXXXX, lng: XX.XXXXX }
},
center: {
lat: XX.XXXXXX,
lng: XX.XXXXXX
}
}
In my query, I need to retrieve all places that have a location.center within the bounds of a google.maps object. This is what I have so far:
query = {}
var southWest = map.getBounds().getSouthWest();
southWest = [southWest.lat(), southWest.lng()];
var northEast = map.getBounds().getNorthEast();
northEast = [northEast.lat(), northEast.lng()];
query["location.center"] = { $within: { $box: [southWest, northEast] } }
However, I keep encountering this error message:
Exception from Meteor.flush: Error: Unrecognized key in selector: $within
at Error (<anonymous>)
at Function.LocalCollection._exprForConstraint (http://localhost:3000/packages/minimongo/selector.js?2373a18a9a4640513e41d7850f17f62f76b7c589:559:11)
at Function.LocalCollection._exprForOperatorTest (http://localhost:3000/packages/minimongo/selector.js?2373a18a9a4640513e41d7850f17f62f76b7c589:468:36)
at Function.LocalCollection._exprForKeypathPredicate (http://localhost:3000/packages/minimongo/selector.js?2373a18a9a4640513e41d7850f17f62f76b7c589:387:34)
at Function.LocalCollection._exprForSelector (http://localhost:3000/packages/minimongo/selector.js?2373a18a9a4640513e41d7850f17f62f76b7c589:307:36)
at Function.LocalCollection._compileSelector (http://localhost:3000/packages/minimongo/selector.js?2373a18a9a4640513e41d7850f17f62f76b7c589:284:24)
at new LocalCollection.Cursor (http://localhost:3000/packages/minimongo/minimongo.js?7f5131f0f3d86c8269a6e6db0e2467e28eff6422:71:39)
at LocalCollection.find (http://localhost:3000/packages/minimongo/minimongo.js?7f5131f0f3d86c8269a6e6db0e2467e28eff6422:57:10)
at _.extend.find (http://localhost:3000/packages/mongo-livedata/collection.js?3ef9efcb8726ddf54f58384b2d8f226aaec8fd53:155:34)
at Template.feed.feed_items (http://localhost:3000/client/modules/js/feed.js?5ed30ddbd861944b636dbe03c13cc80421258a5b:129:17)
I'm not sure how to proceed from here. When I use JSON.stringify(query), I noticed that the query appears like this:
{"location.center":{"$within":{"$box":[[39.93623526127148,-75.63687337060549],[39.984129247435064,-75.57438862939455]]}}}
Is there a way to prevent the quotes around the $within and $box selectors? It seems that's where the exception is coming from.