30109/backend/src/db/seeders/20231127130745-sample-data.js

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

const Matches = db.matches;

const Predictions = db.predictions;

const Purchases = db.purchases;

const MatchesData = [
  {
    match_name: 'Team A vs Team B',

    match_date: new Date('2023-11-01T15:00:00Z'),
  },

  {
    match_name: 'Team C vs Team D',

    match_date: new Date('2023-11-02T18:00:00Z'),
  },

  {
    match_name: 'Team E vs Team F',

    match_date: new Date('2023-11-03T20:00:00Z'),
  },

  {
    match_name: 'Team G vs Team H',

    match_date: new Date('2023-11-04T17:00:00Z'),
  },
];

const PredictionsData = [
  {
    prediction_name: 'Team A wins',

    price: 10.99,

    // type code here for "relation_one" field

    // type code here for "relation_one" field
  },

  {
    prediction_name: 'Team C wins',

    price: 12.99,

    // type code here for "relation_one" field

    // type code here for "relation_one" field
  },

  {
    prediction_name: 'Draw between Team E and Team F',

    price: 8.99,

    // type code here for "relation_one" field

    // type code here for "relation_one" field
  },

  {
    prediction_name: 'Team G wins',

    price: 9.99,

    // type code here for "relation_one" field

    // type code here for "relation_one" field
  },
];

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

    // type code here for "relation_one" field

    purchase_date: new Date('2023-11-01T16:00:00Z'),
  },

  {
    // type code here for "relation_one" field

    // type code here for "relation_one" field

    purchase_date: new Date('2023-11-02T19:00:00Z'),
  },

  {
    // type code here for "relation_one" field

    // type code here for "relation_one" field

    purchase_date: new Date('2023-11-03T21:00:00Z'),
  },

  {
    // type code here for "relation_one" field

    // type code here for "relation_one" field

    purchase_date: new Date('2023-11-04T18:00:00Z'),
  },
];

// Similar logic for "relation_many"

async function associatePredictionWithMatch() {
  const relatedMatch0 = await Matches.findOne({
    offset: Math.floor(Math.random() * (await Matches.count())),
  });
  const Prediction0 = await Predictions.findOne({
    order: [['id', 'ASC']],
    offset: 0,
  });
  if (Prediction0?.setMatch) {
    await Prediction0.setMatch(relatedMatch0);
  }

  const relatedMatch1 = await Matches.findOne({
    offset: Math.floor(Math.random() * (await Matches.count())),
  });
  const Prediction1 = await Predictions.findOne({
    order: [['id', 'ASC']],
    offset: 1,
  });
  if (Prediction1?.setMatch) {
    await Prediction1.setMatch(relatedMatch1);
  }

  const relatedMatch2 = await Matches.findOne({
    offset: Math.floor(Math.random() * (await Matches.count())),
  });
  const Prediction2 = await Predictions.findOne({
    order: [['id', 'ASC']],
    offset: 2,
  });
  if (Prediction2?.setMatch) {
    await Prediction2.setMatch(relatedMatch2);
  }

  const relatedMatch3 = await Matches.findOne({
    offset: Math.floor(Math.random() * (await Matches.count())),
  });
  const Prediction3 = await Predictions.findOne({
    order: [['id', 'ASC']],
    offset: 3,
  });
  if (Prediction3?.setMatch) {
    await Prediction3.setMatch(relatedMatch3);
  }
}

async function associatePredictionWithUser() {
  const relatedUser0 = await Users.findOne({
    offset: Math.floor(Math.random() * (await Users.count())),
  });
  const Prediction0 = await Predictions.findOne({
    order: [['id', 'ASC']],
    offset: 0,
  });
  if (Prediction0?.setUser) {
    await Prediction0.setUser(relatedUser0);
  }

  const relatedUser1 = await Users.findOne({
    offset: Math.floor(Math.random() * (await Users.count())),
  });
  const Prediction1 = await Predictions.findOne({
    order: [['id', 'ASC']],
    offset: 1,
  });
  if (Prediction1?.setUser) {
    await Prediction1.setUser(relatedUser1);
  }

  const relatedUser2 = await Users.findOne({
    offset: Math.floor(Math.random() * (await Users.count())),
  });
  const Prediction2 = await Predictions.findOne({
    order: [['id', 'ASC']],
    offset: 2,
  });
  if (Prediction2?.setUser) {
    await Prediction2.setUser(relatedUser2);
  }

  const relatedUser3 = await Users.findOne({
    offset: Math.floor(Math.random() * (await Users.count())),
  });
  const Prediction3 = await Predictions.findOne({
    order: [['id', 'ASC']],
    offset: 3,
  });
  if (Prediction3?.setUser) {
    await Prediction3.setUser(relatedUser3);
  }
}

async function associatePurchaseWithUser() {
  const relatedUser0 = await Users.findOne({
    offset: Math.floor(Math.random() * (await Users.count())),
  });
  const Purchase0 = await Purchases.findOne({
    order: [['id', 'ASC']],
    offset: 0,
  });
  if (Purchase0?.setUser) {
    await Purchase0.setUser(relatedUser0);
  }

  const relatedUser1 = await Users.findOne({
    offset: Math.floor(Math.random() * (await Users.count())),
  });
  const Purchase1 = await Purchases.findOne({
    order: [['id', 'ASC']],
    offset: 1,
  });
  if (Purchase1?.setUser) {
    await Purchase1.setUser(relatedUser1);
  }

  const relatedUser2 = await Users.findOne({
    offset: Math.floor(Math.random() * (await Users.count())),
  });
  const Purchase2 = await Purchases.findOne({
    order: [['id', 'ASC']],
    offset: 2,
  });
  if (Purchase2?.setUser) {
    await Purchase2.setUser(relatedUser2);
  }

  const relatedUser3 = await Users.findOne({
    offset: Math.floor(Math.random() * (await Users.count())),
  });
  const Purchase3 = await Purchases.findOne({
    order: [['id', 'ASC']],
    offset: 3,
  });
  if (Purchase3?.setUser) {
    await Purchase3.setUser(relatedUser3);
  }
}

async function associatePurchaseWithPrediction() {
  const relatedPrediction0 = await Predictions.findOne({
    offset: Math.floor(Math.random() * (await Predictions.count())),
  });
  const Purchase0 = await Purchases.findOne({
    order: [['id', 'ASC']],
    offset: 0,
  });
  if (Purchase0?.setPrediction) {
    await Purchase0.setPrediction(relatedPrediction0);
  }

  const relatedPrediction1 = await Predictions.findOne({
    offset: Math.floor(Math.random() * (await Predictions.count())),
  });
  const Purchase1 = await Purchases.findOne({
    order: [['id', 'ASC']],
    offset: 1,
  });
  if (Purchase1?.setPrediction) {
    await Purchase1.setPrediction(relatedPrediction1);
  }

  const relatedPrediction2 = await Predictions.findOne({
    offset: Math.floor(Math.random() * (await Predictions.count())),
  });
  const Purchase2 = await Purchases.findOne({
    order: [['id', 'ASC']],
    offset: 2,
  });
  if (Purchase2?.setPrediction) {
    await Purchase2.setPrediction(relatedPrediction2);
  }

  const relatedPrediction3 = await Predictions.findOne({
    offset: Math.floor(Math.random() * (await Predictions.count())),
  });
  const Purchase3 = await Purchases.findOne({
    order: [['id', 'ASC']],
    offset: 3,
  });
  if (Purchase3?.setPrediction) {
    await Purchase3.setPrediction(relatedPrediction3);
  }
}

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

    await Predictions.bulkCreate(PredictionsData);

    await Purchases.bulkCreate(PurchasesData);

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

      await associatePredictionWithMatch(),

      await associatePredictionWithUser(),

      await associatePurchaseWithUser(),

      await associatePurchaseWithPrediction(),
    ]);
  },

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

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

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