mongodb find in node js

var MongoClient = require('mongodb').MongoClient;
var ObjectId = require('mongodb').ObjectID;
var url = 'mongodb://localhost:27017/App';
var findUser = function (db, callback) {
var cursor = db.collection('users').find();
cursor.each(function (err, doc) {
if (doc != null) {
console.dir(doc);
} else {
callback();
}
});
};

MongoClient.connect(url, function (err, db) {
findUser(db, function () {
db.close();
});
});

how to insert document to mongodb in node js

var mongodb = require("mongodb");

var MongoClient = mongodb.MongoClient;

var uri = 'mongodb://127.0.0.1:27017/App';
MongoClient.connect(uri, function (err, db)
{
if (err) {

throw err;
}
else
{
var cc = db.collection('users');

cc.insert([{ 'a': 1 }, { 'a': 2 }, { 'b': 3 }], { w: 1 }, function (docs) {

});

}

db.close();
});

appending-to-child-collection-in-mongodb

var translations = [...] //translations to add languageModel.update({}, { $push: { translations: { $each: translations } } }, { multi: true }).exec();