Export all the models

model.js

const mongoose = require('mongoose');

const personSchema = require('./models/person');
const dogSchema = require('./models/dog');
const catSchema = require('./models/cat');

const models = {
  Person: mongoose.model('Person', personSchema),
  Dog: mongoose.model('Dog', dogSchema),
  Cat: mongoose.model('Cat', catSchema)
};


// explicitly create each collection
// for Mongoose multi-document write support which is needed for transactions
Object.values(models).forEach(model => {
  model.createCollection();
});

module.exports = models;