koa connects to mongodb database time error Unexpected token import, has been introduced into babel server.js const db = require( . mongodb db ); const Koa = require( koa ); const webpack = require( webpack ); const merge = require( webpack-m...
[ { _id:001 ... arrs:[{name: a ,score:10}, {name: b ,score:11}, {name: c ,score:12}, {name: d ,score:13} ] } { _id:002 ... arrs:[{name: a ,score:11}, {name: b ,score:12}, {name: c ,score:13}, {name: ...
topic description the following is a set of built replicas, where 12 nodes are arbitration nodes 192.168.1.10 br 27017 192.168.1.11 purl 27017 192.168.1.12 purl 27017 replica set set is: sss nodejs uses mongoose middleware to connect to mongodb...
in the for loop, how to get the data asynchronously through mongoose, and how to execute the following commands after all the asynchronous methods are finished. pseudo code is as follows: function getData (list) { let result = [] list.fo...
do not understand why add await userInfo.save (); to report Unexpected identifier error, really can not find the problem, ask God for help, thank you! const config = require ( .. config ) const axios = require ( axios ) const mongoose = require...
problem description for example, take the World Foreign language School as an example. When you use mongoose s $regex for fuzzy matching, you can match when you enter keywords such as the world and foreign languages, but when you enter keywords that ...
1 there is a Cannot set property updateAt of undefined error, but there is data in the database "use strict" const PostSchema = Schema({ title: String, meta:{ createdAt:{ type:Date, default:Date.n...
data can be found using get find but post always returns an empty array router.post( login , function (req, res) { let params = { userName: req.body.userName, userPwd: req.body.userPwd } User.find(params, function(err, doc) { ...
when you associate with mysql, you can use id to associate, and you can store two tables during the same database operation. Because the primary key id can be self-increasing and is not affected by other factors, the two tables can be associated with id,...
problem description mongoose populate doesn t seem to work. Confusingly, I use it in another part of the project, and it s normal . the environmental background of the problems and what methods you have tried mongodb: 4.0.1 mongoose: 5.2.9 rel...
problem description use mongoose in nodejs const query=myModel.find({name: xiaoming }); const total=query.count(); const data=query.skip(20).limit(10); Why is it wrong to write in this way? how to write correctly? ...
Environment: Mongodb 3.6.3 mongoose: 5.2.5 nodeJS: 8.x description: simulate the blog system. There are two collection (articles comments), schema as follows Query for comment Params: { offset limit sortBy } exports.getComment...
problem description there is a shopping cart cartList field under the user table. The field type is as follows: cartList: [ { shopId: { type: Schema.ObjectId }, shopName: String, goodsList: [ ...
problem description how do I delete data at a specific location in an array in mongodb? the entity of an aircraft like this: number:B-xxxx, components:[fuselage,wings,engines,landinggears] I now want to delete the third data in components, but I c...
above: storage.dbPath data db systemLog.logAppend false : it s not right at all, is it so lame, or there s something wrong with the way I open it? who can explain why? Note: mac environment, brew install mongodb installation, mongodb versi...
const Article = new Schema({ Title: { type: String, required: true }, Content: { type: String, required: true }, CreatedAt: { type: Date, default: new Date, get: v => moment(v).format( YYYY-MM-DD HH:mm )}, UpdatedAt: { type: Date, d...
const userSchema = new Schema({ name:{type:String}, clubnumber:{type:String}, memo:[{ memos:{type:String} }] }) the data structure is as above. Now you want to match name and clubnumber, to query all the memo under the library db.userModel....
requirements, filter the time range of the data and describe the picture meta: { createAt: { type: Date, dafault: Date.now() }, updateAt: { type: Date, dafault: Date.now() } } ...
see a shopping item in github. All user orders create a schema1 to store all user orders. User personal information creates schema2,schema2. In addition to basic information, there is a personal order: [] to store personal orders. there is a question....
after mongodb has designed the schema, it has been running normally for some time (data is already available). When you adjust the schema later, for example, to add a field and decrease a field, what to do with the original data? do you have to wash the ...
I had an interview question at today s interview. It was something like this. I feel very roundabout. I hope you can take a look at it for me. Thank you. the question is whether the 1 will be output three times below, and if not, can it be modified to...
a b c d 4 people a delegate the task to b. b delegate the task to c. c delegate the task to d. . The record seen by a. A-> b-> c-> d . how should the data table be designed? ...
{ "_id" : { "$oid" : "5b8e1d485d30a6499820cfc5" }, "id" : 5, "lessonCount" : 5, "userCount" : 6, "users" : [{ "phone" : "1301111000", &q...
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Vue< title> <script src="https: cdn.bootcss.com vue 2.4.2 vue.min.js">< script> < head> <body> <div id="a...
now it will be encapsulated in a js file. Axios wants to uniformly handle the status of the query here. Permission handling (for example, jump to the login page without permission and modify the status in store). How can I call a method like this.$route...