Mongo DB Transactions

https://docs.mongodb.com/v3.4/tutorial/perform-two-phase-commits/

Fawn

npm i fawn

const Fawn = require('fawn');
...
Fawn.init(mongoose)
try{
  new Fawn.Task()
    .save('rentals', rental)
    .update('movies', { _id: movie._id }, {
       $inc: { numberInstock: -1 }
    })
    .run();
 }
 catch(ex) {
    res.status(500).send('Something failed');
 }