text: const router = require('express').Router();
  const { Category, Product } = require('../../models');
  
  // The `/api/categories` endpoint
  
  router.get('/', (req, res) => {
    // find all categories
    // be sure to include its associated Products
    Category.findAll({
      include: [
        {
          model: Product,
          attributes: ['id', 'product_name','price','stock','category_id']
        }
      ]
    })
    .then(dbCategoryData => res.json(dbCategoryData))
    .catch(err => {
      console.log(err);
      res.status(500).json(err);s
    })
  });
  
  router.get('/:id', (req, res) => {
    // find one category by its `id` value
    Category.findOne({
      where: {
        id: req.params.id
      },
      include: [
        {
          model: Product, 
          attributes: ['id', 'product_name','price','stock','category_id']
        }
      ]
    })
    .then(dbCategoryData => {
      if(!dbCategoryData) {
        res.status(404).json({ message: 'No category found with this id.'});
        return;
      }
      res.json(dbCategoryData);
    })
    .catch(err => {
      console.log(err);
      res.status(500).json(err)
    });
  });
  
  router.post('/', (req, res) => {
    // create a new category
    Category.create({
      category_name: req.body.category_name,
    })
    .then(dbCategoryData => res.json(dbCategoryData))
    .catch(err => {
      console.log(err);
      res.status(500).json(err);
    });
  });
  
  router.put('/:id', (req, res) => {
    // update a category by its `id` value
    Category.update(req.body, {
      where: {
        id: req.params.id
      }
    })
    .then(dbCategoryData => {
      if(!dbCategoryData[0]) {
        res.status(404).json({ message: 'No category found with this id.' });
        return; 
      }
      res.json(dbCategoryData);
    })
    .catch(err => {
      console.log(err);
      res.status(500).json(err);
    })
  });
  
  router.delete('/:id', (req, res) => {
    // delete a category by its `id` value
    Category.destroy({ 
      where: {
        id: req.params.id
      }
    })
    .then(dbCategoryData => {
      if(!dbCategoryData) {
        res.status(404).json({ message: 'No category found with this id.' });
        return;
      }
      res.json(dbCategoryData);
    })
    .catch(err => {
      console.log(err);
      res.status(500).json(err);
    });
  });
  
  module.exports = router;
  