Create mutation pattern in GraphQL - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a mutation in GraphQL?

A mutation is a special type of GraphQL operation used to create, update, or delete data on the server.

beginner

What is the basic structure of a create mutation in GraphQL?

A create mutation usually has a name, input arguments for the new data, and specifies the fields to return after creation.

beginner

Why do we specify return fields in a GraphQL mutation?

Because GraphQL lets clients ask for exactly what they need, specifying return fields ensures the client gets the necessary data after the mutation runs.

intermediate

Example: Write a simple create mutation to add a new user with name and email.

mutation { createUser(name: "Alice", email: "[e-mail]") { id name email } }

intermediate

What is the role of input types in create mutations?

Input types group related fields into one argument, making mutations cleaner and easier to manage, especially for many fields.

What keyword starts a mutation operation in GraphQL?

A mutation

B query

C update

D create

The keyword 'mutation' is used to start a mutation operation in GraphQL.

In a create mutation, what do you usually provide as input?

A The database name

B The fields to delete

C The fields of the new data to create

D The server IP address

You provide the fields of the new data you want to create as input.

Why do you specify fields after the mutation call?

A To ignore those fields

B To delete those fields

C To update those fields

D To tell the server what data to return after mutation

Specifying fields tells the server what data to send back after the mutation.

Which of these is a valid mutation name for creating a user?

A listUsers

B createUser

C deleteUser

D getUser

'createUser' is a typical name for a mutation that creates a user.

What is the benefit of using input types in mutations?

A They group input fields for cleaner code

B They speed up the server

C They encrypt data

D They delete old data

Input types group related input fields, making the mutation easier to read and manage.

Explain the steps to write a create mutation in GraphQL.

Think about how you tell the server what to create and what to get back.

Describe why specifying return fields in a mutation is important.

Consider how GraphQL differs from traditional APIs in data fetching.