node.js connect to mongodb code example
Example 1: how to connect local mongoDb to node
const mongoose = require('mongoose');
mongoose.connect(
mongoURI,
{
useNewUrlParser: true,
useUnifiedTopology: true
},
(err) => {
if (err) console.log(err);
app.listen(3000);
}
);
const mongodb = require('mongodb');
const MongoClient = mongodb.MongoClient;
let _db;
const mongoConnect = (cb) => {
MongoClient.connect('mongodb://127.0.0.1:27017/test')
.then((client) => {
_db = client.db();
cb()
console.log('Connected to MongoDb');
}).catch((err) => {
console.log(err);
});
}
const getDb = () => {
if (_db) return _db;
throw 'No database found';
}
exports.mongoConnect = mongoConnect;
exports.getDb = getDb;
Example 2: mongodb connection node
{
"mongoURI": "add_your_key =_here"
}
const mongoose = require("mongoose");
const config = require("config");
const db = config.get("mongoURI");
const connectDB = async () => {
try {
await mongoose.connect(db, {
useNewUrlParser: true,
useCreateIndex: true,
useFindAndModify: false,
});
console.log("MongoDB connected...");
} catch (err) {
console.log(err.message);
process.exit(1);
}
};
# DONE ✅
npm i express bcryptjs jsonwebtoken config express-validator mongoose
npm i -D nodemon concurrently
Example 3: how to connect mongodb and nodejs
const {MongoClient} = require('mongodb');