Declare Array of Non-Nullables using Annotation-Based HotChocolate

Question

I can't figure out how to make it so that the elements of the array are non nullable using annotation-based HotChocolate. I'm looking to create a gql schema for my class that looks like:

foos: [Foo!]!

However, at the moment all I've been able to come up with for my class is:

class Bar
{
[GraphQLNonNullType]
public List<Foo> foos {get; set;}
}

I am using C# 9.0

Does your C# version support nullable reference types? – ademchenko Aug 10 '21 at 10:24 — ademchenko, Aug 10 '21 at 10:24
Yes it supports nullable reference types, I am using C# 9 – MrMeik Aug 10 '21 at 15:27 — MrMeik, Aug 10 '21 at 15:27

score 1 · Answer 1 · answered Aug 12 '21 at 20:34

I solved my problem!

While I was using C# 9, my project was not configured to enforce explicit nullability. I changed my .csproj configuration file to include the line

<Nullable>enable</Nullable>

This has the added benefit of no longer needing to use the [GraphQLNonNullType] attribute anymore. My new code looks like this:

class Bar
{
    public List<Foo> foos {get; set;}
}

Which generates the gql schema I am expecting.

If you don't want to change your entire project settings to achieve the same result, here is another option.

class Bar
{
    #nullable enable
    public List<Foo> foos {get; set;}
}

Declare Array of Non-Nullables using Annotation-Based HotChocolate

1 Answers1