GraphQL Schema Example

schema.gql

type Query {
  bookList: [BookList!]
  book(id: ID!): Book
  authorList: [AuthorList!]
  author(id: ID!): Author
}

type Book {
  id: ID!
  title: String!
  description: String
  author: Author!
}

type BookList {
  count: Int
  nodes: [Book!]
}

type Author {
  id: ID!
  name: String!
  bookList: AuthorBookList!
}

type AuthorList {
  count: Int!
  nodes: [Author!]
}

type AuthorBookList {
  count: Int!
  nodes: [Book!]
}

input BookInput {
  title: String!
  description: String
  author: ID!
}

input AuthorInput {
  name: String!
  bookList: [BookInput!]
}

type Mutation {
  createBook(data: BookInput!): Book
  updateBook(id: ID! data: BookInput): Book
  deleteBook(id: ID!): Book
  createAuthor(data: AuthorInput!): Author
  updateAuthor(id: ID! data: AuthorInput!): Author
  deleteAuthor(id: ID!): Author
}