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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))  }];

mongoose.connect('mongodb://localhost/persons', 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) throw err;
    // when querying data, instead of providing a callback, you can instead    // leave that off and get a query object returned    const query = Person.find({ age: { $lt: 1000 } });
    // this allows you to continue applying modifiers to it    query.sort('birthday');    query.select('name');
    // you can chain them together as well    // a full list of methods can be found:    // http://mongoosejs.com/docs/api.html#query-js    query.where('age').gt(21);
    // finally, when ready to execute the query, call the exec() function    query.exec(function(err, results) {      if (err) throw err;
      console.log(results);
      cleanup();    });  });});
function cleanup() {  Person.remove(function() {    mongoose.disconnect();  });}