Nullable reference types not detected in mutation parameters

If a mutation uses separate parameters (vs. a parameters object), any of the parameters that are of a reference type and are marked as nullable still show up as non-nullable in the GraphQL.

For example, in a mutation:

void Update(InputType a, InputType? b) { ... }

Should output the GraphQL:

update(a: InputType!, b: InputType)

Currently, it outputs:

update(a: InputType!, b: InputType!)

EntityGraphQL should inspect the nullability:

var nullabilityContext = new NullabilityInfoContext();
var nullabilityInfo = nullabilityContext.Create(parameterInfo);
bool isNullable = nullabilityInfo.WriteState is NullabilityState.Nullable;

[lukemurray]

Whoops I did miss that. Thanks

[Eli-Black-Work]

@lukemurray It looks like this bug probably isn’t related to this issue, so I’ve split it off into a separate bug report: https://github.com/EntityGraphQL/EntityGraphQL/issues/221

@breyed Sorry for the noise! 🙂