Adding mutations

In the previous section, we learned how to create a GraphQL API using HotChocolate. We added a query root type to query data. In this section, we will discuss how to modify data using mutations.

Mutations are used to modify data in GraphQL. A mutation consists of three parts:

• Input: The input is the data that will be used to modify the data. It is named with the Input suffix following the convention, such as AddTeacherInput.
• Payload: The payload is the data that will be returned after the mutation is executed. It is named with the Payload suffix following the convention, such as AddTeacherPayload.
• Mutation: The mutation is the operation that will be executed. It is named as verb + noun following the convention, such as AddTeacherAsync.

Let us add a mutation to create a new teacher. We will use the following steps:

1. Create an AddTeacherInput class in the GraphQL/Mutations folder, as shown here:

   public record AddTeacherInput(  ...