In this Chapter , we will Read all the data from the mongoDb collection "details".
Step - 1 : Including Packages
We will start by
requiring the package.
We are using the following package in our application :
var mongo = require('mongodb');
Step - 2 : Establish Connection
Now let's establish a connection between the mongoDb Database and our node.js application.
var new_db = "mongodb://localhost:27017/demo_db"
Step - 3 : Read From DB
find() is an inbuilt method which is used to Read all
data from the mongoDb
collection.
//read-all-occurance-mongodb-nodejs.js
mongo.connect(new_db , function(error , db){
if (error){
throw error;
}
//Read All the data from the "details" collection.
db.collection("details").find({}).toArray( (err , collection) => {
if(err) throw err;
console.log("Record Read successfully");
console.log(collection);
db.close();
});
});
D:\nj-learn-mongo>node read-all-occurance-mongodb-nodejs.js
D:\nj-learn-mongo>node read-all-occurance-mongodb-nodejs.js
Record Read successfully
[ { name: 'Nodejsera',
age: '23',
mobile: '9876543210',
_id: 59706a56a4f6761e3cc22c98 },
{ name: 'rishabhio',
age: '25',
mobile: '1234567890',
_id: 59706c3771da112bd8b922dc },
{ name: 'rishabhio',
age: '25',
mobile: '1234567890',
_id: 597073b2c6f60f5b3c23a1a5 } ]