对子文档的地理空间查询

Question

我有一个猫鼬模式，其子文档包含一个位置字段（带有 2dSpehre 索引）。像这样：

var playerSchema = new mongoose.Schema({
    name: { type: String, required: true },
    addresses: [
        {
            address: {
                street: String,
                city: String,
                zip: String,
                country: String
            },
            loc: { type: [Number], index: '2dSphere' }
        }
    ],
});

当我尝试通过地理空间运算符查询地址时，我收到此错误：planner returned error: unable to find index for $geoNear query。查询如下所示：

var query = {
    'addresses.loc': {
        $nearSphere: {
            $geometry: { type: 'Point', coordinates: [16.3738189, 48.2081743] }
        }
    }
};
Player.find(query).exec();

我还通过 mongo 检查了索引确实存在：

> db.player.getIndexes()
[
    {
        "v" : 1,
        "key" : {
            "_id" : 1
        },
        "name" : "_id_",
        "ns" : "project.player"
    },
    {
        "v" : 1,
        "key" : {
            "addresses.loc" : "2dsphere"
        },
        "name" : "addresses.loc_2dsphere",
        "ns" : "project.player",
        "2dsphereIndexVersion" : 2
    }
]

我做错了什么？提前致谢。

Answer 1

您确定您使用的是正确的集合吗？默认情况下，Mongoose 会将您的收藏名称复数（所以 players 而不是 player）。

下面的脚本对我有用。出于某种原因，当在架构中指定 2dsphere 索引时，Mongoose 没有为我创建索引，因此我将其移出。

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var playerSchema = new mongoose.Schema({
    name: { type: String, required: true },
    addresses: [
        {
            address: {
                street: String,
                city: String,
                zip: String,
                country: String
            },
            loc: { 'type': { type: String }, 'coordinates': { type: [Number] } }
        }
    ],
});

playerSchema.index({'addresses.loc': '2dsphere'});
var Player = mongoose.model('Player', playerSchema);

mongoose.connect('mongodb://localhost/test');

var query = Player.find({
    'addresses.loc': {
        $nearSphere: {
            $geometry: { type: 'Point', coordinates: [16.3738189, 48.2081743] }
        }
    }
}, function (err, players) {
    console.log(err)
    console.log(players)
});