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// import async to make control flow simplier'use strict';
const async = require('async');
// import the rest of the normal stuffconst mongoose = require('../../lib');
require('./person.js')();
const Person = mongoose.model('Person');
// define some dummy dataconst data = [  {    name: 'bill',    age: 25,    birthday: new Date().setFullYear((new Date().getFullYear() - 25))  },  {    name: 'mary',    age: 30,    birthday: new Date().setFullYear((new Date().getFullYear() - 30))  },  {    name: 'bob',    age: 21,    birthday: new Date().setFullYear((new Date().getFullYear() - 21))  },  {    name: 'lilly',    age: 26,    birthday: new Date().setFullYear((new Date().getFullYear() - 26))  },  {    name: 'alucard',    age: 1000,    birthday: new Date().setFullYear((new Date().getFullYear() - 1000))  }];

// to connect to a replica set, pass in the comma delimited uri and optionally// any connection options such as the rs_name.const opts = {  replSet: { rs_name: 'rs0' }};mongoose.connect('mongodb://localhost:27018/persons,localhost:27019,localhost:27020', opts, function(err) {  if (err) throw err;
  // create all of the dummy people  async.each(data, function(item, cb) {    Person.create(item, cb);  }, function(err) {    if (err) {      // handle error    }
    // create and delete some data    const prom = Person.find({ age: { $lt: 1000 } }).exec();
    prom.then(function(people) {      console.log('young people: %s', people);    }).then(cleanup);  });});
function cleanup() {  Person.remove(function() {    mongoose.disconnect();  });}