Mongoose near(...)查询2dsphere索引字段未返回有效结果

Question

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

我有一个Schema,坐标存储为数组,索引为2dsphere:

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

我使用.where().near()以下命令运行mongoose查询:

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

我启用了mongoose.set('debug', true),可以看到生成的调试:

使用坐标在集合中插入2个文档[ 10, -20 ]:

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

搜索坐标附近的文档[ 10, -20 ]:

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

查询不返回任何结果.

我通过搜索证明文件在数据库中type.它是我无法工作的地理空间查询.

我正在使用mongodb v2.6.1和mongoose v3.8.8

完整的工作示例如下:

架构:(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();
        });
    });

});

的package.json:

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

通过摩卡:

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

Answer 1

似乎这是一个猫鼬虫.

更改查询以使用GeoJSON对象而不是坐标对,如下所示:

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

导致以下查询:

Mongoose: models.find({ loc: { '$near': { 
        '$maxDistance': 1,
        '$geometry': { type: 'Point', coordinates: [ 10, -20 ] } } } 
    }) { fields: undefined }  

搜索现在成功了.

该文档使用坐标对明确显示的查询:

query.where('loc').near({ center: [10, 10], maxDistance: 5 });

但是,看起来这不起作用,示例应该是:

query.where('loc').near({ center: { coordinates: [10, 10], type: 'Point' }, maxDistance: 5 });