GraphQL HotChocolate - Method overloading for queries

When building my GraphQL schema with HotChocolate, I typically use the code first or annotation first approach.

Annotation-based example

	public class Query
	{
	public Book GetBook(string isbn, [Service] IBookRepository bookRepository)
	{
	return bookRepository.GetByISBN(isbn);
	}
	}

view raw AnnotationBased.cs hosted with ❤ by GitHub

Code-first example

	public class Query
	{
	public Book GetBook(string isbn, [Service] IBookRepository bookRepository)
	{
	return bookRepository.GetByISBN(isbn);
	}
	}

view raw Query.cs hosted with ❤ by GitHub

	public class QueryType : ObjectType<Query>
	{
	protected override void Configure(IObjectTypeDescriptor<Query> descriptor)
	{
	descriptor
	.Field(f => f.GetBook(default!, default!))
	.Type<BookType>();
	}
	}

view raw QueryType.cs hosted with ❤ by GitHub

In both cases I start from a class where I add multiple methods where each method maps to a different query. But what if I use method overloading and introduce a second implementation of the method using different arguments?

	public class Query
	{
	public Book GetBook(string isbn, [Service] IBookRepository bookRepository)
	{
	return bookRepository.GetByISBN(isbn);
	}
	public Book GetBook(Author author, [Service] IBookRepository bookRepository)
	{
	return bookRepository.GetByAuthor(author);
	}
	}

view raw Query.cs hosted with ❤ by GitHub

HotChocolate will not complain and you will be able to succesfully run your GraphQL endpoint. However when you look at the generated GraphQL schema only one of the methods is available:

	type Query {
	book(isbn: String): Book
	}

view raw schema.graphql hosted with ❤ by GitHub

To make this work we need to tell HotChocolate to use a different name for our overloaded method:

Annotation-based example

	public class Query
	{
	public Book GetBook(string isbn, [Service] IBookRepository bookRepository)
	{
	return bookRepository.GetByISBN(isbn);
	}
	[GraphQLName("getbookbyauthor")]
	public Book GetBook(Author author, [Service] IBookRepository bookRepository)
	{
	return bookRepository.GetByAuthor(author);
	}
	}

view raw Query.cs hosted with ❤ by GitHub

Code-first example

	public class Query
	{
	public Book GetBook(string isbn, [Service] IBookRepository bookRepository)
	{
	return bookRepository.GetByISBN(isbn);
	}
	public Book GetBook(Author author, [Service] IBookRepository bookRepository)
	{
	return bookRepository.GetByAuthor(author);
	}
	}

view raw Query.cs hosted with ❤ by GitHub

	public class QueryType : ObjectType<Query>
	{
	protected override void Configure(IObjectTypeDescriptor<Query> descriptor)
	{
	descriptor
	.Field(f => f.GetBook(default!, default!))
	.Name("getbookbyauthor")
	.Type<BookType>();
	}
	}

view raw QueryType.cs hosted with ❤ by GitHub

That should do the trick.