gistfile1.txt

const express = require('express');
const router = express.Router();
const models = require('../models');

router.param('id', (req, res, next) => {
  req.findOne = models.customer.findOne({
    where: {
      id: req.params.id
    }
  });
  next();
});

router
  .get('/customers', (req, res, next) => {
    models.customer.findAll()
    .then(res.json.bind(res))
    .catch(next);
  })
  .get('/customers/:id', (req, res, next) => {
    req.findOne
    .then(customer => {
      if (!customer) {
        return next();
      }
      return res.json(customer);
    })
    .catch(next);
  })

  .post('/customers', (req, res, next) => {
    const data = req.body;
    models.customer.create(data)
    .then(res.json.bind(res))
    .catch(next);
  })

  .put('/customers/:id', (req, res, next) => {
    req.findOne
    .then(data => {
      if (!data) {
        return next();
      }
      const customer = Object.assign(data, req.body);
      return customer.save()
        .then(() => {
          res.json(customer);
        });
    })
    .catch(next);
  })

  .delete('/customers/:id', (req, res, next) => {
    models.customer.destroy({
      where: {
        id: req.params.id
      }
    })
    .then(deleted => {
      if (!deleted) {
        return next();
      }
      return res.end('204');
    })
    .catch(next);
  });

module.exports = router;