Delete mutation pattern in GraphQL - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of a delete mutation in GraphQL?

A delete mutation is used to remove data from the database by specifying which item to delete, usually by its unique identifier.

beginner

In a delete mutation, why do we usually pass an ID as an argument?

Passing an ID ensures the mutation knows exactly which record to delete, avoiding accidental removal of multiple or wrong records.

intermediate

What should a delete mutation typically return?

It usually returns the deleted item's ID or a confirmation message to show the deletion was successful.

beginner

Show a simple example of a delete mutation in GraphQL.

mutation DeleteUser($id: ID!) { deleteUser(id: $id) { id } }

intermediate

Why is it important to handle errors in delete mutations?

Handling errors helps inform the user if the item was not found or if deletion failed, improving user experience and data safety.

What argument is commonly required in a delete mutation?

A New data to update

B ID of the item to delete

C List of all items

D User password

Delete mutations need the ID to identify which item to remove.

What does a delete mutation usually return?

A The entire database

B All remaining items

C The deleted item's ID or confirmation

D Nothing at all

Returning the deleted item's ID confirms the deletion was successful.

Which GraphQL operation type is used for deleting data?

A mutation

B query

C subscription

D fragment

Mutations are used to change data, including deletions.

Why should you handle errors in delete mutations?

A To inform users if deletion fails

B To speed up the deletion

C To add new data

D To change the schema

Error handling improves user experience by showing if deletion did not work.

Which of these is a valid delete mutation example?

A subscription { deleteUser(id: "123") { id } }

B query { deleteUser(id: "123") { id } }

C mutation { addUser(name: "John") { id } }

D mutation { deleteUser(id: "123") { id } }

Delete operations must be mutations and include the ID of the item to delete.

Explain the steps and key parts of a delete mutation pattern in GraphQL.

Think about how you tell the server what to delete and how it confirms deletion.

Describe why it is important to return data after a delete mutation and what kind of data is usually returned.

Consider how the client knows the deletion worked.