seed2.js

const db = require('./models');

const myUsers = [
  {
    userFullName: 'Mary',
    username: 'maryb',
    userEmail: 'maryb@gmail.com',
    userPassword: 'supersecret',
    userCity: 'San Antonio',
    userPhoto: 'profile1.png',
    userJoinDate: Date()
  },

  {
    userFullName: 'John',
    username: 'johncd',
    userEmail: 'johncd@gmail.com',
    userPassword: 'Carrot2',
    userCity: 'Los Angeles',
    userPhoto: 'profile2.png',
    userJoinDate: Date()
  }
];

const myCities = [
  {
    cityName: 'London',
    cityPhoto: 'london.png'
  },
  {
    cityName: 'Sydney',
    cityPhoto: 'sydney.png'
  },
  {
    cityName: 'San Francisco',
    cityPhoto: 'san_francisco.png'
  },
  {
    cityName: 'Seattle',
    cityPhoto: 'seattle.png'
  },
  {
    cityName: 'Tokyo',
    cityPhoto: 'tokyo.png'
  },
  {
    cityName: 'Copenhagen',
    cityPhoto: 'copenhagen.png'
  }
];

db.Cities.deleteMany({}, (err, cities) => {
  if (err) {
    console.log(`can't delete all cities: ${error}`);
  }
  console.log('removed cities');

  db.Cities.create(myCities, (err, cities) => {
    if (err) {
      console.log(`create seed city error: ${err}`);
    }
    console.log('created all cities');
    console.log(`created ${myCities.length} cities`);
    db.Users.deleteMany({}, (err, users) => {
      if (err) {
        console.log(`deleted users error: ${err}`);
      }
      console.log('removed users');

      db.Users.create(myUsers, (err, users) => {
        if (err) {
          console.log(`create seed user error: ${err}`);
        }
        console.log('created all users');
        console.log(`created ${myUsers.length} users`);
      });
    });
  });
});