pptyasar

var MongoClient = require('mongodb').MongoClient;
var url = "mongodb://localhost:27017/";

MongoClient.connect(url, function(err, db) {
  if (err) throw err;

  var dbo = db.db("mydb");

// ----------Insert Records------------
  dbo.collection("customers").deleteMany({});

pptyasar

//afterSave
public function afterSave($insert, $changedAttributes)
{
        if ($insert){
            //New record
        }else{
            //Old record

        }