附近的MongoDB查询
我收集了用户、餐厅、产品 我想查询该用户将在其应用程序中看到附近的餐馆(5公里),isOpen:true,并显示每个餐馆的产品,isAvailable and isApproved=true and isArchived:false附近的MongoDB查询,mongodb,mongodb-query,geolocation,aggregation-framework,Mongodb,Mongodb Query,Geolocation,Aggregation Framework,我收集了用户、餐厅、产品 我想查询该用户将在其应用程序中看到附近的餐馆(5公里),isOpen:true,并显示每个餐馆的产品,isAvailable and isApproved=true and isArchived:false let kmToRadian = function(miles){ var earthRadiusInMiles = 6378 return miles / earthRadiusInMiles } var user = dbo.collection('use
let kmToRadian = function(miles){
var earthRadiusInMiles = 6378
return miles / earthRadiusInMiles
}
var user = dbo.collection('users').findOne({_id: id})
var query = {
"location": {
$geoWithin: {
$centerSphere: [ [22.222, 22.222], 5 / 6378.1] //sample coordinates
}
}
}
db.products.aggregate([
{
$lookup: {
from: "restaurants",
localField: "restaurants",
foreignField: "_id",
as: "restaurant"
}
},
{
$match : {
"restaurant.isOpen": true,
"isApproved": true,
"isAvailable": true,
"isArchived": false
}
},
{
$project: {
"restaurant.isOpen": 1,
"isApproved": 1,
"isAvailable": 1,
"isArchived": 1,
"name": 1
}
}
])
在这里,我得到的产品是可提供的,是经批准的:正确和错误。现在,我想去附近5公里的餐馆
集合用户
id: 1
name: "Robert"
location: Object
type: "Point",
coordinates: Array
0: 11.111 //sample coordinates
1: 11.111 //sample coordinates
id: 2
name: "Jason"
location: Object
type: "Point",
coordinates: Array
0: 22.222 //sample coordinates
1: 22.222 //sample coordinates
精选餐厅
id: 1
name: "Burger King"
location: Object
type: "Point",
coordinates: Array
0: 11.111 //sample coordinates
1: 11.111 //sample coordinates
isOpen: true
id: 2
name: "McDonald's"
location: Object
type: "Point",
coordinates: Array
0: 22.222 //sample coordinates
1: 22.222 //sample coordinates
isOpen: true
id: 3
name: "Chick-fil-A"
location: Object
type: "Point",
coordinates: Array
0: 22.333 //sample coordinates
1: 22.333 //sample coordinates
isOpen: true
收藏品
id: 1
name: "Breakfast Whopper Jr."
price: "$1.29"
isAvailable: true
isApproved: true
createdAt: Tues Dec 01 2020 09:15:19 GMT+0800
updatedAt: Tues Dec 01 2020 09:15:19 GMT+0800
isArchived: false
shop: ObjectId('1')
id: 2
name: "Big Mac"
price: "$4.35"
isAvailable: true
isApproved: true
createdAt: Tues Dec 01 2020 09:15:19 GMT+0800
updatedAt: Tues Dec 01 2020 09:15:19 GMT+0800
isArchived: false
shop: ObjectId('2')
id: 3
name: "Spicy Chicken Sandwich"
price: "$3.29"
isAvailable: true
isApproved: true
createdAt: Tues Dec 01 2020 09:15:19 GMT+0800
updatedAt: Tues Dec 01 2020 09:15:19 GMT+0800
isArchived: false
restaurant: ObjectId('3')
输出:
如果Robert在坐标[22.222,22.222]中。
罗伯特将参观麦当劳和奇克菲拉餐厅,因为伊索彭:是的。
展示他们的产品是巨无霸和辣味鸡肉三明治,因为它是可用的,被批准的:正确的,被归档的:错误的。不是答案,只是一些你应该评估自己的想法。以下管道:
let kmToRadian = function(miles){
var earthRadiusInMiles = 6378
return miles / earthRadiusInMiles
}
var user = dbo.collection('users').findOne({_id: id})
var query = {
"location": {
$geoWithin: {
$centerSphere: [ [22.222, 22.222], 5 / 6378.1] //sample coordinates
}
}
}
db.products.aggregate([
{
$lookup: {
from: "restaurants",
localField: "restaurants",
foreignField: "_id",
as: "restaurant"
}
},
{
$match : {
"restaurant.isOpen": true,
"isApproved": true,
"isAvailable": true,
"isArchived": false
}
},
{
$project: {
"restaurant.isOpen": 1,
"isApproved": 1,
"isAvailable": 1,
"isArchived": 1,
"name": 1
}
}
])
isApproved:true、isAvailable:true、isArchived:true
因此,它假设并建议使用此索引:foreignField:\u id
,否则,我将在该字段上创建索引isOpen:true
会很慢,但如果这样做有效的话,以后会提高性能<$lookup
中的code>pipeline可以帮助实现更好的性能,添加这个索引(IMHO)db.restaurants.createIndex({u id:1,isOpen:1})
位置
,因为我们需要该字段(同样值得记住的是,有些东西不是很有用,但是很快就结束了,比一个非常复杂的laggy应用程序更好。同样,你会发现它是如何工作的,我一点也不是专家。)@Minsky Hi,我能对这类查询使用什么提出建议吗。
db.products.aggregate([{$lookup:{from:'restaurants',localField:'restaurants',foreignField:'u id',as:'shop'},},{$match:{'restaurant.isOpen':true}}])
下一步我想得到的是餐厅的产品,可用且已批准的产品是真的,而isArchived是假的。我做得对吗?@MinskyHi,@Minsky很抱歉迟迟没有回复。它没有返回靠近loaction的餐厅。它返回我一个空数组。太好了,不客气
db.products.aggregate([
{
$match: {
"isApproved": true,
"isAvailable": true,
"isArchived": false
}
},
{
$lookup: {
from: "restaurants",
foreignField: "_id",
localField: "restaurant",
as: "restaurant"
}
},
{
$match: {
"restaurant.isOpen": true
}
},
{
$project: {
"restaurant.isOpen": 1,
//"isApproved": 1,
//"isAvailable": 1,
//"isArchived": 1,
"name": 1,
"restaurant.location": 1
}
},
{
$match: {
"restaurant.location": {
$geoWithin: {
$centerSphere: [
[
22.222,
22.222
],
5/6378.1]
}
}
}}
])