added mappers, updated models

app/server/graphql/resolvers/bookOneResolver.ts

@@ -1,13 +0,0 @@
-import { IdentityContext } from '@app/server/identity';
-import { Book, QueryBookOneArgs } from '@generated/types';
-import { books } from './booksManyResolver';
-
-export async function BookOneResolver(
-  _: any,
-  { id }: QueryBookOneArgs,
-  { identity }: IdentityContext
-): Promise<Book> {
-  const book = books.filter(item => item.id === id)[0];
-
-  return book;
-}