Updating documents in Express - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to update a document by its ID using Express and Mongoose.

Express

app.put('/items/:id', async (req, res) => {
  try {
    const updatedItem = await Item.findByIdAndUpdate(req.params.id, [1], { new: true });
    res.json(updatedItem);
  } catch (error) {
    res.status(500).send(error.message);
  }
});

Drag options to blanks, or click blank then click option'

Areq.params

Breq.headers

Creq.query

Dreq.body

Attempts:

3 left

💡 Hint

Common Mistakes

Using req.params instead of req.body for update data

Forgetting to set { new: true } to return the updated document

To update a document, you pass the new data from the request body to the update function.

2fill in blank

medium

Complete the code to update a document and handle the case when the document is not found.

Express

app.put('/users/:id', async (req, res) => {
  try {
    const user = await User.findByIdAndUpdate(req.params.id, req.body, { new: true });
    if (!user) {
      return res.status([1]).send('User not found');
    }
    res.json(user);
  } catch (error) {
    res.status(500).send(error.message);
  }
});

Drag options to blanks, or click blank then click option'

A500

B400

C404

D200

Attempts:

3 left

💡 Hint

Common Mistakes

Using 400 or 500 status codes instead of 404 for not found

Not returning after sending the 404 response

If the document is not found, the server should respond with a 404 Not Found status.

3fill in blank

hard

Fix the error in the code to update a document using Mongoose's updateOne method.

Express

app.patch('/posts/:id', async (req, res) => {
  try {
    const result = await Post.updateOne({ _id: [1] }, req.body);
    res.json(result);
  } catch (error) {
    res.status(500).send(error.message);
  }
});

Drag options to blanks, or click blank then click option'

Areq.body.id

Breq.params.id

Creq.query.id

Dreq.params.postId

Attempts:

3 left

💡 Hint

Common Mistakes

Using req.body.id which may not exist

Using a wrong parameter name like req.params.postId

The document ID is in req.params.id, so use it to find the document to update.

4fill in blank

hard

Fill both blanks to update a document and return the updated document using findOneAndUpdate.

Express

app.put('/products/:id', async (req, res) => {
  try {
    const product = await Product.findOneAndUpdate({ _id: [1] }, [2], { new: true });
    if (!product) {
      return res.status(404).send('Product not found');
    }
    res.json(product);
  } catch (error) {
    res.status(500).send(error.message);
  }
});

Drag options to blanks, or click blank then click option'

Areq.params.id

Breq.body

Creq.query

Dreq.params.productId

Attempts:

3 left

💡 Hint

Common Mistakes

Using req.query instead of req.body for update data

Using wrong parameter name for ID

Use req.params.id to find the product and req.body for the update data.

5fill in blank

hard

Fill all three blanks to update a document with validation and return the updated document.

Express

app.patch('/orders/:id', async (req, res) => {
  try {
    const order = await Order.findByIdAndUpdate([1], [2], { new: true, runValidators: [3] });
    if (!order) {
      return res.status(404).send('Order not found');
    }
    res.json(order);
  } catch (error) {
    res.status(400).send(error.message);
  }
});

Drag options to blanks, or click blank then click option'

Areq.params.id

Breq.body

Ctrue

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Not enabling runValidators, so invalid data can be saved

Using wrong parameter names for ID or update data

Use req.params.id to find the order, req.body for update data, and set runValidators to true to enforce schema validation.