Updating and Deleting Data

In addition to creating data, APIs often need to update and delete existing records.

To update data, you can use PUT or PATCH requests.

app.put('/users/:id', (req, res) => {
  const id = Number(req.params.id);
  const updatedData = req.body;

  const user = users.find(u => u.id === id);

  if (user) {
    user.name = updatedData.name;
    res.json(user);
  } else {
    res.send('User not found');
  }
});

To delete data, you use a DELETE request:

app.delete('/users/:id', (req, res) => {
  const id = Number(req.params.id);

  users = users.filter(u => u.id !== id);

  res.send('User deleted');
});

Examples:

• PUT '/users/1': updates user with id 1;
• DELETE '/users/1': deletes user with id 1.

These operations allow you to modify and remove data in your application.