在2dsphere索引字段上查询没有返回有效结果

我无法使用mongoose的qry.where().near()语法查询mongodb数据库。

我有一个坐标存储为数组的Schema，索引为2dsphere:

loc : { type: [Number], index: '2dsphere' }

我正在使用.where().near()运行猫鼬查询:

qry.where('loc').near({
    center: search.loc,
    maxDistance: search.distance * 1000
});

我已经启用了mongoose.set('debug', true)，并且可以看到结果调试:

在集合中插入2个文档，坐标为[ 10, -20 ]:

Mongoose: models.insert({ _id: ..., loc: [ 10, -20 ], type: 'apple' }) {}  
Mongoose: models.insert({ _id: ..., loc: [ 10, -20 ], type: 'orange' }) {}  

查找坐标[ 10, -20 ]附近的文档:

Mongoose: models.find({ loc: { '$near': [ 10, -20 ], '$maxDistance': 1000 } })

查询返回没有结果。

我已经通过在type上搜索证明了这些文档在数据库中。这是地理空间查询，我无法工作。

我使用mongodb v2.6.1和mongoose v3.8.8

完整的工作示例如下:

模式:(model.js)

var mongoose = require('mongoose'),
    Schema = mongoose.Schema;
var ModelSchema = new Schema({
    type : { type: String, index: true },
    loc  : { type: [Number], index: '2dsphere' }
});
ModelSchema.index({type: 1, loc: 1});
ModelSchema.statics.search = function(search, cb) {
    var qry = this.find();
    if (search.types) {
        qry.where('type').in(search.types);
    }
    if (search.loc) {
        qry.where('loc').near({
            center: search.loc,
            maxDistance: search.distance * 1000
        });
    }
    qry.exec(cb);
};

摩卡测试:(test.ts)

var q = require('node-promise'),
    should = require('should'),
    mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/my-test');
var Model = require('./model');
describe('My Model', function() {
    before(function(done) {
        mongoose.set('debug', true);
        Model.remove().exec(function() {
            var create = function(promises, body) {
                var p = new q.Promise();
                var m = new Model(body);
                m.save(function(err) {
                    if (err) {
                        console.log(err);
                        p.reject();
                    } else {
                        p.resolve();
                    }
                });
                promises.push(p);
            };
            var promises = [];
            create(promises, { type: 'apple',  loc: [ 10, -20 ] });
            create(promises, { type: 'orange', loc: [ 10, -20 ] });
            create(promises, { type: 'apple',  loc: [ 15,  10 ] });
            create(promises, { type: 'orange', loc: [ 15,  10 ] });
            q.all(promises).then(function() {
                done();
            })
        });
    });
    it('should find all', function(done) {
        Model.search({}, function(err, items) {
            items.should.have.length(4);
            done();
        });
    });
    it('should find apples', function(done) {
        Model.search({types: ['apple']}, function(err, items) {
            items.should.have.length(2);
            done();
        });
    });
    // this test fails
    it('should find coords', function(done) {
        Model.search({loc: [ 10, -20 ], distance: 1}, function(err, items) {
            items.should.have.length(2);
            done();
        });
    });
});

package.json:

{
  "name": "test",
  "version": "0.0.0",
  "dependencies": {
    "mongoose": "~3.8.8"
  },
  "devDependencies": {
    "should": "~2.1.0",
    "node-promise": "0.5.10"
  }
}

摩卡:

sudo npm install -g mocha
npm install
mocha ./test.js