const Sequelize = require('sequelize');
const sequelize = require('../config');
let Users = sequelize.define('users', {
  id : {
    type: Sequelize.INTEGER,
    primaryKey: true,
    autoIncrement: true
  },
  username: {
    type: Sequelize.STRING,
  },
  password: {
    type: Sequelize.STRING
  }
});
module.exports = Users;

const Sequelize = require('sequelize');
const sequelize = require('../config');
let products=sequelize.define('products', {
  id : {
    type: Sequelize.INTEGER,
    primaryKey: true,
    autoIncrement: true
  },
  category : {
    type: Sequelize.STRING,
    allowNull: false
  },
  name : {
    type: Sequelize.STRING,
    allowNull: false
  },
  price: {
    type: Sequelize.INTEGER,
    allowNull: false
  }
});
module.exports= products;

const Sequelize = require('sequelize');
const sequelize = require('../config');
let users=require('./user');
let products=require('./product');
let orders=sequelize.define('orders', {
  id: {
    type: Sequelize.INTEGER,
    primaryKey: true,
    autoIncrement: true
  },
  user_id: {
    type: Sequelize.INTEGER,
    references: {
        model: 'users',
        key: 'id'
    }
  },
  product_id: {
    type: Sequelize.INTEGER,
    references: {
        model: 'products',
        key: 'id'
    }
  },
  price: {
    type: Sequelize.INTEGER,
    allowNull: false
  }
});
module.exports= orders;

SELECT * FROM ((orders INNER JOIN users ON users.id=orders.user_id) INNER JOIN products ON products.id=orders.product_id);