标签: geonear

我想通过应用以下过滤器进行 mongodb 查询来搜索公司。

{
    myLocation: [lng1, lat1], // That is to get distance from current location to companies on result.
    region: [lng2, lat2], //That is to get companies within a radius in this region
    radius: 10000,
    tags: ["tag1", "tag2"],
    sort: "asc" // to sort by nearest from current location.
}

我认为它需要使用 $geoNear 两次并进行这样的聚合。

{
    $geoNear: {
        near: {
            type: "Point",
            coordinates: myLocation
        },
        distanceField: 'distance1',
        maxDistance: radius,
        spherical: true,
    },
    $match: { tags: tags },
    $geoNear: {
        near: {
            type: …

这似乎是一个常见的错误，但我似乎无法使其与我见过的所有建议一起工作。这是我的设置：

// point.js (based on mongoose recommended subdocument pattern for reusing the GeoJSON definition
// see here https://mongoosejs.com/docs/geojson.html)
const mongoose = require('mongoose');

const pointSchema = new mongoose.Schema({
    type: {
        type: String,
        enum: ['Point'],
        required: true
    },
    coordinates: {
        type: [Number],
        required: true,
    }
});

exports = pointSchema;

// user.js
var schema = new Schema({
  location: {
    type: pointSchema,
  },
  ...
});

schema.index({ location: '2dsphere' });
var User = mongoose.model('User', schema);

// routeHandler.js
          const near = { type: 'Point', coordinates: [lng, …

我在发布数据更新期间遇到猫鼬错误。错误是：

MongoError：无法提取地理密钥

我尝试通过谷歌搜索找到原因和解决方案，但仍然没有得到任何正确的解决方案。

帖子模型

const geoLocationSchema = new mongoose.Schema({
    type: { type: String, default: 'Point'},
    coordinates: {
        type: [Number],
        index: { type: '2dsphere', sparse: false },
    }
});

const postsSchema = new mongoose.Schema({
    post_title: String,
    geoLocation: geoLocationSchema,
}, {
    timestamps: true
});

后置控制器

const Posts = require("../models/Posts");

var findPattern = {_id: "5e8c661f274e8e57d8e03887"}; 
var updatePattern = {   geoLocation: {
    type: "Point",
    coordinates: [-8.4556973, 114.5110151] }
};

Posts.updateOne(findPattern, updatePattern) .then(updateRes => {
    console.log("post updated"); 
}).catch(err => {
    console.log("error", err.toString()); 
});

输出是：

MongoError：无法提取地理键：{_id：ObjectId（'5e8c661f274e8e57d8e03887'），geoLocation：{类型：“点”，坐标：[-8.455697300000001，114.5110151]，_id：ObjectId（'5e8d7f7c35b9d36d45b48 …

位置点另存为

{
  "location_point" : {
  "coordinates" : [ 
      -95.712891, 
      37.09024
  ],
  "type" : "Point"
  },
  "location_point" : {
  "coordinates" : [ 
      -95.712893, 
      37.09024
  ],
  "type" : "Point"
  },
  "location_point" : {
  "coordinates" : [ 
      -85.712883, 
      37.09024
  ],
  "type" : "Point"
  },
  .......
  .......
}

有几个文件。我需要到group最近的地点。分组后第一个第二个位置将在一个文档中，第三个在第二个文档中。请注意，第一和第二的位置点不相等。两个都是最近的地方。

有什么办法吗？提前致谢。