Step 10

Here is the handler for the HTTP DELETE request through /api/notes/:courseId endpoint:

router.delete("/api/notes/:id", (req, res) => {
  const id = req.params.id;
  notes
    .delete(id)
    .then((note) =>
      note
        ? res.json({ data: note })
        : errorHandler(res, 404, "Resource not found")
    )
    .catch((err) => {
      errorHandler(res, 400, err);
    });
});

Notice, we account for the case where a given ID does not exist in our database:

• The notes.delete operation will return null
• We capture this by responding with a 404 error:

  note
    ? res.json({ data: note })
    : errorHandler(res, 404, "Resource not found")
  

Similarly, here is the handler for the HTTP PUT request through /api/notes/:courseId endpoint:

router.put("/api/notes/:id", (req, res) => {
  const id = req.params.id;
  const content = req.body.content;
  const author = req.body.author;

  notes
    .update(id, content, author)
    .then((note) =>
      note
        ? res.json({ data: note })
        : errorHandler(res, 404, "Resource not found")
    )
    .catch((err) => errorHandler(res, 400, err));
});

We have now implemented all the route handlers.