Deleting documents in Express - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the common HTTP method used to delete a document in Express?

The DELETE method is used to remove a document or resource from the server.

beginner

How do you define a route in Express to handle deleting a document by ID?

Use app.delete('/resource/:id', (req, res) => { ... }) where ':id' is the document identifier.

beginner

What is the role of req.params in a DELETE route?

req.params contains route parameters like the document ID, which you use to identify which document to delete.

beginner

Why should you send a response after deleting a document in Express?

To inform the client that the deletion was successful or if there was an error, ensuring good communication.

beginner

What is a simple example of deleting a document from an array in Express?

Find the document by ID in the array, remove it using array methods like filter or splice, then send a response.

Which Express method is used to handle HTTP DELETE requests?

A app.post()

B app.get()

C app.delete()

D app.put()

app.delete() is the Express method designed to handle DELETE HTTP requests.

In Express, how do you access the ID parameter from the URL '/items/:id'?

A req.body.id

B req.headers.id

C req.query.id

D req.params.id

req.params.id contains the value of ':id' from the URL path.

What should you do after deleting a document in an Express route?

A Send a response to the client

B Do nothing

C Reload the server

D Close the connection without response

Always send a response to inform the client about the result of the deletion.

Which array method can be used to remove an item by ID in JavaScript?

A filter()

B map()

C reduce()

D slice()

filter() creates a new array excluding the item with the matching ID.

What status code is commonly sent after a successful DELETE request?

A 404 Not Found

B 200 OK

C 500 Internal Server Error

D 301 Moved Permanently

200 OK indicates the deletion was successful.

Explain how to set up an Express route to delete a document by its ID.

Think about the HTTP method, route parameters, and response.

Describe why sending a response after deleting a document is important in Express.

Consider communication between server and client.