FAQ: Learn Express Routers - Refactoring Expressions Routes

Frequently Asked Questions Express.js FAQ
1

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This community-built FAQ covers the “Refactoring Expressions Routes” exercise from the lesson “Learn Express Routers”.

Paths and Courses
This exercise can be found in the following Codecademy content:

Web Development

Learn Express

FAQs on the exercise Refactoring Expressions Routes

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2

I’m frustrated beyond belief… this is my code:
const express = require(‘express’);

const { getElementById, getIndexById, updateElement,

seedElements, createElement } = require(’./utils’);

let animals = ;

seedElements(animals, ‘animals’);

animalsRouter = express.Router();

// Get all animals

animalsRouter.get(’/’, (req, res, next) => {

res.send(animals);

});

// Get a single animal

animalsRouter.get(’/:id’, (req, res, next) => {

const animal = getElementById(req.params.id, animals);

if (animal) {

res.send(animal);

} else {

res.status(404).send();

}

});

// Create an animal

animalsRouter.post(’/’, (req, res, next) => {

const receivedAnimal = createElement(‘animals’, req.query);

if (receivedAnimal) {

animals.push(receivedAnimal);

res.status(201).send(receivedAnimal);

} else {

res.status(400).send();

}

});

// Update an animal

animalsRouter.put(’/:id’, (req, res, next) => {

const animalIndex = getIndexById(req.params.id, animals);

if (animalIndex !== -1) {

updateElement(req.params.id, req.query, animals);

res.send(animals[animalIndex]);

} else {

res.status(404).send();

}

});

// Delete a single animal

animalsRouter.delete(’/:id’, (req, res, next) => {

const animalIndex = getIndexById(req.params.id, animals);

if (animalIndex !== -1) {

animals.splice(animalIndex, 1);

res.status(204).send();

} else {

res.status(404).send();

}

});

module.exports = animalsRouter;

it gives me an error, I compare my code to the expressions.js file, looks right, click the solution button, compare the code to the solution exactly the same from what i can tell, reset the exercise and paste my code back in, I get a DIFFERENT error, and I did not change my code from the last. The solution :
const express = require(‘express’);

const { getElementById, getIndexById, updateElement,

seedElements, createElement } = require(’./utils’);

let animals = ;

seedElements(animals, ‘animals’);

animalsRouter = express.Router();

// Get all animals

animalsRouter.get(’/’, (req, res, next) => {

res.send(animals);

});

// Get a single animal

animalsRouter.get(’/:id’, (req, res, next) => {

const animal = getElementById(req.params.id, animals);

if (animal) {

res.send(animal);

} else {

res.status(404).send();

}

});

// Create an animal

animalsRouter.post(’/’, (req, res, next) => {

const receivedAnimal = createElement(‘animals’, req.query);

if (receivedAnimal) {

animals.push(receivedAnimal);

res.status(201).send(receivedAnimal);

} else {

res.status(400).send();

}

});

// Update an animal

animalsRouter.put(’/:id’, (req, res, next) => {

const animalIndex = getIndexById(req.params.id, animals);

if (animalIndex !== -1) {

updateElement(req.params.id, req.query, animals);

res.send(animals[animalIndex]);

} else {

res.status(404).send();

}

});

// Delete a single animal

animalsRouter.delete(’/:id’, (req, res, next) => {

const animalIndex = getIndexById(req.params.id, animals);

if (animalIndex !== -1) {

animals.splice(animalIndex, 1);

res.status(204).send();

} else {

res.status(404).send();

}

});

module.exports = animalsRouter;

Did I find a bug or am I missing something here?

1 Like
3

Had similar issue… pretty sure I did this right, but couldn’t move on without using default solution. Very frustrating. Oh well, just accept and move on,

4

Oh look, another Codecademy lesson that is obtuse, poorly (or not at all) explained, and obfuscates would should be a fairly straightforward task with pointless abstraction. It’s been almost three years, judging from the first comment, of this being essentially useless.

1 Like