text: // import important parts of sequelize library
  const { Model, DataTypes } = require('sequelize');
  // import our database connection from config.js
  const sequelize = require('../config/connection');
  
  // Initialize Product model (table) by extending off Sequelize's Model class
  class Product extends Model {}
  
  // set up fields and rules for Product model
  Product.init(
    {
      // define columns
      id: {
        type: DataTypes.INTEGER,
        allowNull: false,
        primaryKey: true,
        autoIncrement: true
      },
      
      product_name: {
        type: DataTypes.STRING,
        allowNull: false
      },
  
      price: {
        type: DataTypes.DECIMAL,
        allowNull: false,
        validated: {
          isDecimal: true
        }
      },
  
      stock: {
        type: DataTypes.INTEGER,
        allowNull: false,
        default: 10,
        validate: {
          isNumeric: true
        } 
      },
      
      category_id: {
        type: DataTypes.INTEGER,
        references: {
          model: 'category',
          key: 'id'
        }
      }
    },
    {
      sequelize,
      timestamps: false,
      freezeTableName: true,
      underscored: true,
      modelName: 'product',
    }
  );
  
  module.exports = Product;
  