node.js - Create & Find GeoLocation in mongoose -

i'm trying save longitude/latitude of location in user model , query $geonear. i've looked @ page find on topic, still i'm not sure how 1) create model appropriately , how query it.

here's part of model:

loc: {         //type: 'point', // see 1         //type: string, // see 2         coordinates: [number],         index: '2dsphere' // see 3     }, 

@1: according documentation type must 'point' if want store point, throws

typeerror: undefined type `point` @ `loc`   did try nesting schemas? can nest using refs or arrays. 

which makes sense, since guess should string

@2: doesn't throw error, when try store user get:

name: 'validationerror',   errors:     { loc:        { [casterror: cast string failed value "[object object]" @ path "loc"] 

@3: if want create index error:

typeerror: undefined type `2dsphere` @ `loc.index`   did try nesting schemas? can nest using refs or arrays. 

so tried store index felt little bit more appropriate me this:

userschema.index({'loc': '2dsphere'}); 

which throws following error when try save new user:

- { [mongoerror: can't extract geo keys object, malformed geometry?:{ coordinates: [ -73.97, 40.77 ] }]   name: 'mongoerror',   message: 'can\'t extract geo keys object, malformed geometry?:{ coordinates: [ -73.97, 40.77 ] }',   ok: 1,   n: 0,   code: 16572,   errmsg: 'can\'t extract geo keys object, malformed geometry?:{ coordinates: [ -73.97, 40.77 ] }',   writeconcernerror:     { code: 16572,      errmsg: 'can\'t extract geo keys object, malformed geometry?:{ coordinates: [ -73.97, 40.77 ] }' } } mongoerror: can't extract geo keys object, malformed geometry?:{ coordinates: [ -73.97, 40.77 ] } 

---

when updated model on database to $geonear command updated user this:

loc: {coordinates: [-73.97, 40.77]} 

and query this:

 mongoose.model('users').db.db.command({     "geonear": users,     "near": [         <latitude>,         <longitude>     ],     "spherical": true,     "distancemultiplier": 6378.1, // multiplier kilometres     "maxdistance": 100 / 6378.1, // every user within 100 km     "query": { } 

(i used db.command since i've read $geonear not available when using find())

everything tried far got me nowhere, question is:

• how should mongoose model like?
• how can store user or location in database

any appreciated!

if want schema support geojson, first need construct properly:

var userschema = new schema({     loc: {         type: { type: string },         coordinates: [number],     } }); 

that makes sure there no confusion "type" keyword of schema defintition. if want support whole range of geojson types, can make bit looser:

var userschema = new schema({     loc: {         type: { type: string },         coordinates: []     } }); 

next want tie index shema:

userschema.index({ "loc": "2dsphere" }); 

then of course define model , store things correctly:

var user = mongoose.model( "user", userschema );   var user = new user({       "loc": {           "type": "point",          "coordinates": [-73.97, 40.77]      }  }); 

noting data must in longitude latitude order supported geojson , mongodb geospatial query forms.

next, rather dig obscure usages of database commands directly on raw driver method, use things instead directly supported, , better. such $geonear .aggregate() method:

user.aggregate(     [         { "$geonear": {             "near": {                 "type": "point",                 "coordinates": [<long>,<lat>]             },             "distancefield": "distance",             "spherical": true,             "maxdistance": 10000         }}     ],     function(err,results) {      } ) 

and because data geojson, distances converted meters there no need other conversion work.

also note have been messing around this, unless drop collection index tried still there , cause problems.

you can drop indexes collection in mongodb shell ease:

db.users.dropindexes(); 

or since need data re-shaping, drop collection , start again:

db.users.drop(); 

set things , have no problems.