Change my database result to JSON - mysql

Question

I would like to know how to get the result of my query to be a JSON response in Node.js. Currently, I am getting a result from my DB that is in JSON but I cannot access the values in it. My code is below.
connection.connect();
connection.query('select * from ttnews order by post_date DESC Limit 0,10',
function (error, results, fields) {
if (error) throw error;
console.log(results);
});
connection.end();
responseJSON.response = results[0].headline;
callback(null, responseJSON);
By the line responseJSON.response = results[0].headline I am getting an error results is undefined
Any help will be appreciated.

Answer 1

Try this code
var express = require('express');
var app = express();
var mysql = require('mysql');
var readline = require('readline');
var con = mysql.createConnection({
host : 'localhost',
user : 'root',
password : '',
database : 'cmd'//your database name
});
con.connect(function(err){
if(err){
console.log('Error Connecting to Database');
}
});
app.get('/', function(req, res){
con.query('SELECT * FROM ttnews order by post_date DESC Limit 0,10',function(error, data){
if(error) {
console.log(error)
}else{
res.json(data)
}
});
});
app.listen(3000,function(){
console.log('server listening on 3000');
});
Hope this helps...

Answer 2

With Express 4.x, the output rows from mysql db is in json format.
For example,
sqlConnect.connection.query('SELECT * from users', function(err, rows, fields){
if (err) {
console.log("Querying error");
} else {
console.log(rows);
}
sqlConnect.connection.end();
});
The output is of the form
[ RowDataPacket {
id: 1,
username: 'Dani',
password: '1q2w3e4r',
verified: 0 } ]
So now you can get the individual values using the . operator. For example, console.log(rows[0].username) will log the value 'Dani'