how to connect mongodb with express js code example
Example 1: connect mongo to express api
npm i mongoose
const mongoose = require("mongoose");
mongoose
.connect(
"your mongodb URI",
{
useNewUrlParser: true,
useCreateIndex: true,
useFindAndModify: false,
useUnifiedTopology: true,
}
)
.then(() => console.log("mongodb connected"))
.catch((err) => {
console.err(err.message);
process.exit(1);
});
Example 2: how to connect mongodb with node js
async function main(){
const uri = "mongodb+srv://<username>:<password>@<your-cluster-url>/test?retryWrites=true&w=majority";
const client = new MongoClient(uri);
try {
await client.connect();
await listDatabases(client);
} catch (e) {
console.error(e);
} finally {
await client.close();
}
}
main().catch(console.error);
Example 3: how to access a database in express
var MongoClient = require('mongodb').MongoClient
MongoClient.connect('mongodb://localhost:27017/animals', function (err, client) {
if (err) throw err
var db = client.db('animals')
db.collection('mammals').find().toArray(function (err, result) {
if (err) throw err
console.log(result)
})
})
Example 4: expressjs with mongodb
app.post('/quotes', (req, res) => { console.log(req.body) })You should be able to get an object similar to the following in your command line:{name: 'pdp',quotes: 'pdp psr pdp'}
Example 5: how to access a database in express
var mysql = require('mysql')
var connection = mysql.createConnection({
host: 'localhost',
user: 'dbuser',
password: 's3kreee7',
database: 'my_db'
})
connection.connect()
connection.query('SELECT 1 + 1 AS solution', function (err, rows, fields) {
if (err) throw err
console.log('The solution is: ', rows[0].solution)
})
connection.end()
Example 6: how to connect mongodb and nodejs
const {MongoClient} = require('mongodb');