there is a table in the database. I read this table first. If there is anything that meets the conditions, I will directly return. If not, update a piece of data. Now, if two requests come in, neither of them will read the qualified data. The expected r...
chat program, the user can grab the vest. If two users grab the vest at the same time, both users will grab the vest. How can the first user block the table when operating the table? how should I use transactions with logic like the following? rob_...
the environmental background of the problems and what methods you have tried now the project is a node service. For the two nodes, postgresql does read-write separation, and the master node does write operations. Due to the large amount of data, you n...
< hr > how can this method be changed to sequelize syntax? Multiple table associations urgent. makeupUpdateAccountInfo: function (data) { var companyCode = "" if (data && data.companyCode) { companyCode = ...
2 tables select tb1.name as name, tb1.id as id, (select count (1) from tb2 where tb1.type = tb2.type) as count from tb1 how to implement the sequelize method, and how to get such a result is using include, and how to write where. ...
Business background there are three table relationships as follows: Master Table teacher : id , name Student Table student : id , name teacher-student relationship table relation : id , teacher_id , student_id the above three ta...
code tables and tag tables are many-to-many relationships code Table model use strict ; module.exports = function(sequelize, DataTypes) { var code = sequelize.define( code , { markdown: DataTypes.TEXT, title:DataTypes.STRING },...
this is the definition of my model const Sequelize = require( sequelize ); const sequelize = require( .. .. db db_tp.js ); const manage_notice = sequelize.define( manage_notice , { nid: {type:Sequelize.INTEGER,primaryKey: true,autoIncrement:...
as shown in the figure, Table 1 is associated with Table 2. How to click submit and save the two tables together ...
ask for help. The company s project is divided into libraries according to business. After establishing a connection using sequelize, the connection cache is saved in memory. When there are many sub-libraries, the memory occupation is too high, is there...
var data = [{ id:1 } ,{ id:2 } ,{ id:3 }] is similar to this structure. An element object in data corresponds to a record in a database table. then Sequelize how to do it all at once? ...
1: { name: A , age: 10 } 2: [{ id:1, name: A , 1name book: xxx }, { id:2, name: A , book: xxx }] name A book are all stored in Table 2. How to deal with a table structure like this? ...
console.log print: Missing where attribute in the options parameter what s the problem? model user.js module.exports = app => { const { STRING, INTEGER, DATE, BOOLEAN } = app.Sequelize; return app.mo...
refer to the figure above, existing permission:{ id:DataTypes.INTEGER, type:DataTypes.STRING } Operate:{ id:DataTypes.INTEGER, name:DataTypes.STRING url:DataTypes.STRING } how to write associate? for permission Can you dy...
Sequelize.query ( select * from.. . this is the native framework custom query method ask how to execute the query in egg-sequelize. ...
how to convert field hump type and underscore type by adding, deleting, modifying and searching operation by Sequelize ...
I want to find out how to change all the primaryKey, of a table ...
as shown in the figure, every time I create data, it returns at a strange time adding this has no effect timezone: +08:00 ...
encountered the following scenario when developing the page: Log in to the registration page, and the other pages (such as home page and details page) have different structures, but the other pages have the same page skeleton, such as the same head an...
methods: { handleCurrentChange(val) { console.log(`: ${val}`); } } how should the click event be written, send the id of the click page number to the background, and then get the relevant page number id content to render to the page? ...
ask < div class= "box " > <span class="item">< span> <span class="item">< span> < div > .box { display: flex; justify-content: space-between; } set up so that both span are on both...
problem description as shown in the figure, no matter how my vscode, vector, map changes when debugging, it only shows size=0 the platform version of the problem and what methods you have tried related codes Please paste the code text belo...
-sharp! env python -sharpcoding: utf-8 import socketio import eventlet from flask import Flask, jsonify, render_template from flaskext.mysql import MySQL import pymysql sio = socketio.Server(async_mode = eventlet ) app = Flask(__name__) app.wsgi_app...