I am currently working on a project where I have CRUD operation using node.js and mysql.
var mysql = require('mysql');
var express = require('express');
var session = require('express-session');
var con = mysql.createConnection({
host: "database",
user: "admin",
password: "pass",
database: "db"
});
var app = express();
con.connect(function(err) {
if (err) throw err;
con.query("SELECT * FROM shops where id =33", function (err, result, fields) {
if (err) throw err;
console.log(result);
});
});
app.use('/shop', function(err) {
con.query("SELECT * FROM shops where id =34", function (err, result, fields) {
if (err) throw err;
console.log(result);
});
});
app.listen('3000', () => {
console.log('Server started on port 3000');
});
I want to get the shops data using localhost:3000/shops and brands data using localhost:3000/brands. But i don't know how to do that because i am very new in node.js. Infact,Today i my first day. I someone gives me som demo project or some thing like this. I will be very thankful.
app.get('/brands',(req,res) =>{
//inside query
})
like...thiss
Related
I am building a project for Database Course.
I am already done with Front End. I built the front end using Tailwind CSS.
Now I've started working on the backend and getting data from the database and display on my website using Node.js
I am a beginner and I want the result of the query to be styled and formatted like an actual table.
So I need help as I didn't find a reliable solution on the internet
I AM ATTACHING THE OUTPUT RESULT AND THE KIND OF RESULT I WANT.
Here is my Node.js code
var mysql = require('mysql');
const http = require('http');
const hostname = '127.0.0.1';
const port = 3000;
var con = mysql.createConnection({
host: "localhost",
user: "root",
password: "12345678",
database: "mydb"
});
var sqlQuery = "SELECT username FROM Users";
con.connect(function (err) {
if (err) throw err;
console.log("Connected!");
// con.query(sqlQuery, function (err, result) {
// if (err) throw err;
// console.log(result);
// });
});
// display query result on host
const server = http.createServer((req, res) => {
res.statusCode = 200;
res.setHeader('Content-Type', 'text/plain');
// display query result on host
con.query(sqlQuery, function (err, result) {
if (err) throw err;
//show result in table format
res.end(JSON.stringify(result));
});
});
server.listen(port, hostname, () => {
console.log(`Server running at http://${hostname}:${port}/`);
});
CURRENT OUTPUT
OUTPUT I WANT
const app = require('./app');
var mysql = require('mysql');
const server = app.listen(3000, () => {
console.log(`Express is running on port ${server.address().port}`);
});
I learning nodejs 3 day but i don't know how can i fix it i try to fix it but not work.
Someone Help me please
I don't know what i wrong. I want to insert data into mysql with pug
be like login with html and use php to select data in phpmyadmin
register in pug and data send to nodejs and node post data to mysql
I'm sorry my English and gramma so bad :(
const express = require('express');
var mysql = require('mysql');
const router = express.Router();
const app = require('../app.js');
var conn = mysql.createConnection({
host: "localhost",
user: "root",
password: "1234",
database:"project_test"
});
conn.connect(function(err) {
if (err) throw err;
console.log("Index Connection!");
});
conn.connect(function(err) {
if (err) throw err;
console.log("Connected!");
var sql = "INSERT INTO customer (name, address) VALUES ('Company Inc', 'Highway 37')";
conn.query(sql, function (err, result) {
if (err) throw err;
console.log("1 record inserted");
});
});
module.exports = router;
I'm using the XAMPP software as a local DB and trying to get into the get function at the below with no success.
In addition, I can not see any console comments as well:
Web error
Node.js
Thank you for your help!!
var express = require('express');
const cors = require('cors');
var app = express();
var corsOptions=
{
origin: 'http://localhost:3000',
optionsSuccessStatus: 200,
allowHeaders: ['sessionId', 'Content-Type'],
exposedHeaders: ['sessionId'],
credentials: true,
}
app.use(cors(corsOptions));
var mysql = require('mysql');
var con = mysql.createConnection({
host: "localhost",
user: "root",
password: "",
database: "apptxtproject"
});
app.get("/getnetworks"), (req,res)=>{
con.query(`SELECT * FROM appadtxt`, function (err, result, fields) {
if (err) throw err;
console.log(result)
})
}
app.listen(4000, function () {
console.log('Haydeeeeee!!!');
})
In your app.get you have a bad syntax error try this:
app.get("/getnetworks", (req, res) => {
con.query(`SELECT * FROM appadtxt`, function(err, result, fields) {
if (err) throw err;
console.log(result);
});
});
I trying to get result query from mysql database in Nodejs, but the 'results.affectedRows' is always 'undefined'. I'm currently using Mac. I hope you interest for answer my question. Following this my code:
const expres = require('express');
const mysql = require('mysql');
const app = expres();
var connection = mysql.createConnection({
host: "localhost",
user: "root",
password: "",
database: "sistemizin"
});
console.log("Connected!");
app.set('view engine', 'hbs'); app.use(expres.static('publik'));
app.get('/', (req, res) => {
res.render('cobaview');
});
app.post('/', (req, res) => {
var contoh = `SELECT namamatkul FROM matkul_dosen WHERE idmatkuldosen = 70`;
connection.query(contoh, (err, results, fields) => {
if (err) {
return console.error(err.message);
}
console.log('Results counted:' + results.affectedRows);
});
connection.end();
res.end();
});
app.listen(8084);
console.log("server is running at http://127.0.0.1:8084/");
results.affectedRows is returned only in case of insert, update or delete query. Since yours is a select query, result is as expected.
I made a project where i include database which i wrote on mysql and it make a json file from database and also output all users in browser but I have some problem. I want to output one user how can i do this(this is example how it must output http://localhost:8080/user/1). I used express and mysql. Please help me. Thanks.
This is my code:
'use strict';
const mysql = require('mysql');
const express = require('express');
const http = require('http');
const router = express()
// http://nodejs.org/docs/v0.6.5/api/fs.html#fs.writeFile
const fs = require('fs');
const connection = mysql.createConnection({
host: 'localhost',
user: 'lado',
password: '1234'
});
connection.connect();
connection.query('SELECT * FROM bankdb.account;', function(err, results, fields) {
if(err) throw err;
fs.writeFile('account.json', JSON.stringify(results), function (err) {
if (err) throw err;
console.log('Saved!');
});
connection.end();
});
const pool = mysql.createPool({
host: 'localhost',
user: 'lado',
password: '1234',
database: 'bankdb',
charset: 'utf8'
});
var reo ='<html><head><title>Output From MYSQL</title></head><body><h1>Output From MYSQL</h1>{${table}}</body></html>';
function setResHtml(sql, cb){
pool.getConnection((err, con)=>{
if(err) throw err;
con.query(sql, (err, res, cols)=>{
if(err) throw err;
var table =''; //to store html table
//create html table with data from res.
for(var i=0; i<res.length; i++){
table +='<tr><td>' + (i+1) +'</td><td>'+ res[i].name +'</td><td>'+ res[i].address +'</td></tr>';
}
table ='<table border="1"><tr><th>ID</th><th>Name</th><th>Amount</th></tr>'+ table +'</table>';
con.release(); //Done with mysql connection
return cb(table);
});
});
}
const sqll ='SELECT * FROM bankdb.account';
const server = http.createServer((req, res)=>{
setResHtml(sqll, resql=>{
reo = reo.replace('{${table}}', resql);
res.writeHead(200, {'Content-Type':'text/html; charset=utf-8'});
res.write(reo, 'utf-8');
res.end();
});
});
server.listen(8080, ()=>{
console.log('Server running at //localhost:8080/');
router.get('/users/:id', function(req, res, next) {
var user = users.getUserById(req.params.id);
res.json(user);
});
exports.getUserById = function(id) {
for (var i = 0; i < users.length; i++) {
if (users[i].id == id) return users[i];
}
};
});
Just get the specific user based on their id:
router.get( '/user/:id', function( req, res ) { // When visiting '/user/:id'
var id = req.params.id; // For example if you visit localhost/user/24 the id will be 24
connection.query('SELECT * FROM bankdb.account WHERE id=' + mysql.escape( id ), function(err, results, fields) {
if(err) throw err;
fs.writeFile('account.json', JSON.stringify(results), function (err) {
if (err) throw err;
console.log('Saved!');
});
connection.end();
});
} );
If you grab every user from the database, your program will use up much more memory.
Just grab the one you need and work with him.