mutation.graphql

type CreateBookPayload {
  book: Book
}

type CreateMusicPayload {
  music: Music
}

input CreateBookInput {
  _id: ID!
  authorId: String
}

input CreateMusicInput {
  _id: ID!
  name: String
}

type Mutation {
  createBook(input: CreateBookInput): CreateBookPayload
  createMusic(input: CreateMusicInput): CreateMusicPayload
}