30466/backend/src/db/seeders/20231127130745-sample-data.js

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

const Customers = db.customers;

const Orders = db.orders;

const Products = db.products;

const Shipments = db.shipments;

const CustomersData = [
  {
    name: 'John Doe',

    email: 'john.doe@example.com',

    address: '123 Elm Street, Springfield',
  },

  {
    name: 'Jane Smith',

    email: 'jane.smith@example.com',

    address: '456 Oak Avenue, Metropolis',
  },

  {
    name: 'Alice Johnson',

    email: 'alice.johnson@example.com',

    address: '789 Pine Road, Gotham',
  },

  {
    name: 'Bob Brown',

    email: 'bob.brown@example.com',

    address: '101 Maple Lane, Star City',
  },
];

const OrdersData = [
  {
    // type code here for "relation_one" field

    // type code here for "relation_many" field

    status: 'Pending',

    order_date: new Date('2023-10-01T10:00:00Z'),
  },

  {
    // type code here for "relation_one" field

    // type code here for "relation_many" field

    status: 'Delivered',

    order_date: new Date('2023-10-02T11:30:00Z'),
  },

  {
    // type code here for "relation_one" field

    // type code here for "relation_many" field

    status: 'Shipped',

    order_date: new Date('2023-10-03T14:45:00Z'),
  },

  {
    // type code here for "relation_one" field

    // type code here for "relation_many" field

    status: 'Shipped',

    order_date: new Date('2023-10-04T09:15:00Z'),
  },
];

const ProductsData = [
  {
    name: 'Phone Case',

    description: 'Durable and stylish phone case',

    price: 19.99,

    // type code here for "images" field

    category: 'PhoneCases',
  },

  {
    name: 'Ring Holder',

    description: 'Convenient ring holder for phones',

    price: 9.99,

    // type code here for "images" field

    category: 'ChargingAccessories',
  },

  {
    name: 'Earbuds Case',

    description: 'Protective case for earbuds',

    price: 14.99,

    // type code here for "images" field

    category: 'ScreenProtectors',
  },

  {
    name: 'Magnetic Power Bank',

    description: 'Portable magnetic power bank',

    price: 29.99,

    // type code here for "images" field

    category: 'MagneticPowerBanks',
  },
];

const ShipmentsData = [
  {
    // type code here for "relation_one" field

    tracking_number: 'TRACK123456',

    shipped_date: new Date('2023-10-02T12:00:00Z'),

    delivery_date: new Date('2023-10-05T15:00:00Z'),
  },

  {
    // type code here for "relation_one" field

    tracking_number: 'TRACK654321',

    shipped_date: new Date('2023-10-03T13:00:00Z'),

    delivery_date: new Date('2023-10-06T17:00:00Z'),
  },

  {
    // type code here for "relation_one" field

    tracking_number: 'TRACK112233',

    shipped_date: new Date('2023-10-04T14:00:00Z'),

    delivery_date: new Date('2023-10-07T18:00:00Z'),
  },

  {
    // type code here for "relation_one" field

    tracking_number: 'TRACK445566',

    shipped_date: new Date('2023-10-05T15:00:00Z'),

    delivery_date: new Date('2023-10-08T19:00:00Z'),
  },
];

// Similar logic for "relation_many"

async function associateOrderWithCustomer() {
  const relatedCustomer0 = await Customers.findOne({
    offset: Math.floor(Math.random() * (await Customers.count())),
  });
  const Order0 = await Orders.findOne({
    order: [['id', 'ASC']],
    offset: 0,
  });
  if (Order0?.setCustomer) {
    await Order0.setCustomer(relatedCustomer0);
  }

  const relatedCustomer1 = await Customers.findOne({
    offset: Math.floor(Math.random() * (await Customers.count())),
  });
  const Order1 = await Orders.findOne({
    order: [['id', 'ASC']],
    offset: 1,
  });
  if (Order1?.setCustomer) {
    await Order1.setCustomer(relatedCustomer1);
  }

  const relatedCustomer2 = await Customers.findOne({
    offset: Math.floor(Math.random() * (await Customers.count())),
  });
  const Order2 = await Orders.findOne({
    order: [['id', 'ASC']],
    offset: 2,
  });
  if (Order2?.setCustomer) {
    await Order2.setCustomer(relatedCustomer2);
  }

  const relatedCustomer3 = await Customers.findOne({
    offset: Math.floor(Math.random() * (await Customers.count())),
  });
  const Order3 = await Orders.findOne({
    order: [['id', 'ASC']],
    offset: 3,
  });
  if (Order3?.setCustomer) {
    await Order3.setCustomer(relatedCustomer3);
  }
}

// Similar logic for "relation_many"

async function associateShipmentWithOrder() {
  const relatedOrder0 = await Orders.findOne({
    offset: Math.floor(Math.random() * (await Orders.count())),
  });
  const Shipment0 = await Shipments.findOne({
    order: [['id', 'ASC']],
    offset: 0,
  });
  if (Shipment0?.setOrder) {
    await Shipment0.setOrder(relatedOrder0);
  }

  const relatedOrder1 = await Orders.findOne({
    offset: Math.floor(Math.random() * (await Orders.count())),
  });
  const Shipment1 = await Shipments.findOne({
    order: [['id', 'ASC']],
    offset: 1,
  });
  if (Shipment1?.setOrder) {
    await Shipment1.setOrder(relatedOrder1);
  }

  const relatedOrder2 = await Orders.findOne({
    offset: Math.floor(Math.random() * (await Orders.count())),
  });
  const Shipment2 = await Shipments.findOne({
    order: [['id', 'ASC']],
    offset: 2,
  });
  if (Shipment2?.setOrder) {
    await Shipment2.setOrder(relatedOrder2);
  }

  const relatedOrder3 = await Orders.findOne({
    offset: Math.floor(Math.random() * (await Orders.count())),
  });
  const Shipment3 = await Shipments.findOne({
    order: [['id', 'ASC']],
    offset: 3,
  });
  if (Shipment3?.setOrder) {
    await Shipment3.setOrder(relatedOrder3);
  }
}

module.exports = {
  up: async (queryInterface, Sequelize) => {
    await Customers.bulkCreate(CustomersData);

    await Orders.bulkCreate(OrdersData);

    await Products.bulkCreate(ProductsData);

    await Shipments.bulkCreate(ShipmentsData);

    await Promise.all([
      // Similar logic for "relation_many"

      await associateOrderWithCustomer(),

      // Similar logic for "relation_many"

      await associateShipmentWithOrder(),
    ]);
  },

  down: async (queryInterface, Sequelize) => {
    await queryInterface.bulkDelete('customers', null, {});

    await queryInterface.bulkDelete('orders', null, {});

    await queryInterface.bulkDelete('products', null, {});

    await queryInterface.bulkDelete('shipments', null, {});
  },
};