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);
});
});
Related
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 am creating a simple server application using the following code
const express = require('express');
const mysql = require('mysql');
const PORT = process.env.PORT || 3000;
const app = express();
const connection = mysql.createConnection({
host: 'localhost',
user: 'user',
password: 'password',
database: 'mydata',
});
connection.connect(function (err) {
err ? console.log(err) : console.log(connection);
});
require('./routes/html-routes')(app);
app.listen(PORT, () => {
console.log('app running on port %s', PORT);
});
module.exports = app;
in file server.js
and then a route in file html-routes.js
const mysql = require('mysql');
module.exports = function (app) {
app.get('/', function (req, res) {
connection.query('select * from mydata;', function (err, data) {
err ? res.send(err) : res.json({ mydata: data });
});
});
};
to get data from database
I get the error
ReferenceError: connection is not defined
at /Users/arjunbhandari/Desktop/GL-IT/backend/routes/html-routes.js:5:5
I have struggled for the past 6 hours and cannot understand the problem.
Thanks
As the error states, there is no connection defined (or inherited) within ./routes/html-routes.js.
You still can pass the connection property as a second argument to your exported function:
const mysql = require('mysql');
module.exports = function (app, connection) {
app.get('/', function (req, res) {
connection.query('select * from mydata;', function (err, data) {
err ? res.send(err) : res.json({ mydata: data });
});
});
};
then update the route mounting call within your main server file:
require('./routes/html-routes')(app, connection);
You should review your route implementation logic as this should not be the best design approach to use data-store connections.
I created a server.js file which looks like this.
var express = require('express'),
app = express(),
port = process.env.PORT || 3000;
app.listen(port);
console.log('todo list RESTful API server started on: ' + port)
var mysql = require('mysql');
var con = mysql.createConnection({
host: "localhost",
user: "**",
password: "**",
database: "test"
});
app.get('/nodeapi/getimg',function(req,res){
con.connect(function(err) {
if (err) throw err;
con.query("SELECT * FROM images", function (err, result, fields) {
if (err) throw err;
console.log(result[1].image);;
});
})})
When I run this file in my command terminal I get the correct result.
When I create a http.get function like this for my ionic app:
getimg(){
var url = 'http://localhost:3000/nodeapi/getimg';
this.http.get(url).subscribe(responseData => console.log(responseData));}
I get an error saying net::ERR_CONNECTION_REFUSED. I have looked everywhere but cannot seem to find it. I am using phpmyadmin for the database. Would anyone please be so kind to explain to me what I am doing wrong.
Give this example a try. Also, do you expect more than one result from your query? If not you will want to use result[0] not 1 to get the first (and maybe only) result (located at index 0).
var express = require('express');
var cors = require('cors');
var mysql = require('mysql');
var port = process.env.PORT || 3000;
var app = express();
app.use(cors());
app.options('*', cors());
var con = mysql.createConnection({
host: "localhost",
user: "**",
password: "**",
database: "test"
});
app.get('/nodeapi/getimg', function(req, res) {
con.connect(function(err) {
if(err) throw err;
con.query("SELECT * FROM images", function(err, result, fields) {
if(err) throw err;
console.log(result[1].image);
res.send(result[1].image); // send the value back to the caller.
});
})
})
app.listen(port, function() {
console.log('CORS-enabled web server listening on port 80')
})
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
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.