Unable to stitch remote schema with custom scalar type

[SARAVANA1501]

Is there an existing issue for this?

• [X] I have searched the existing issues

Product

Hot Chocolate

Describe the bug

We have existing graphql server which is having custom scalar type

public class JObjectGraphType : ScalarGraphType
{
    public JObjectGraphType() => Name = "JObject";

    public override object Serialize(object value) => ParseValue(value);

    public override object ParseValue(object value)
    {
        var jsonString = JsonConvert.SerializeObject(value);
        return JObject.Parse(jsonString);
    }

    public override object ParseLiteral(IValue value) => Serialize(value.Value);
}

Added remote schema

builder.Services.AddHttpClient(APP1, c => c.BaseAddress = new Uri("https://xxx.com/graphql"));
builder.Services.AddHttpClient(APP2, c => { c.BaseAddress = new Uri("http://yyy.com/graphql"); });
builder.Services.AddGraphQLServer().AddRemoteSchema(APP1).AddRemoteSchema(APP2)

Getting below error message

 1. Unable to resolve type reference `[JObject]`. (HotChocolate.Types.ObjectType)

         at HotChocolate.Configuration.RegisteredType.GetType[T](TypeReference typeRef)
         at HotChocolate.Types.OutputFieldBase`1.OnCompleteField(ITypeCompletionContext context, ITypeSystemMember declaringMember, TDefinition definition)
         at HotChocolate.Types.ObjectField.OnCompleteField(ITypeCompletionContext context, ITypeSystemMember declaringMember, ObjectFieldDefinition definition)
         at HotChocolate.Types.FieldBase`1.CompleteField(ITypeCompletionContext context, ITypeSystemMember declaringMember)
         at HotChocolate.Types.FieldBase`1.HotChocolate.Types.Helpers.IFieldCompletion.CompleteField(ITypeCompletionContext context, ITypeSystemMember declaringMember)
         at HotChocolate.Internal.FieldInitHelper.CompleteFieldsInternal[TField](ITypeCompletionContext context, ITypeSystemMember declaringMember, TField[] fields)
         at HotChocolate.Internal.FieldInitHelper.CompleteFieldsInternal[TFieldDefinition,TField](ITypeCompletionContext context, ITypeSystemMember declaringMember, IEnumerable`1 fieldDefinitions, Func`3 fieldFactory, Int32 fieldCount)
         at HotChocolate.Internal.FieldInitHelper.CompleteFields[TFieldDefinition,TField](ITypeCompletionContext context, ITypeSystemMember declaringMember, IReadOnlyList`1 fieldDefs, Func`3 fieldFactory)
         at HotChocolate.Types.ObjectType.OnCompleteFields(ITypeCompletionContext context, ObjectTypeDefinition definition)
         at HotChocolate.Types.ObjectType.OnCompleteType(ITypeCompletionContext context, ObjectTypeDefinition definition)
         at HotChocolate.Types.TypeSystemObjectBase`1.CompleteType(ITypeCompletionContext context)
         at HotChocolate.Configuration.TypeInitializer.CompleteType(RegisteredType registeredType)
         at HotChocolate.Configuration.TypeInitializer.<CompleteTypes>b__29_0(RegisteredType type)
         at HotChocolate.Configuration.TypeInitializer.ProcessTypes(TypeDependencyFulfilled fulfilled, Func`2 action)
         at HotChocolate.Configuration.TypeInitializer.CompleteTypes()
         at HotChocolate.Configuration.TypeInitializer.Initialize()
         at HotChocolate.SchemaBuilder.Setup.InitializeTypes(SchemaBuilder builder, IDescriptorContext context, IReadOnlyList`1 types)
         at HotChocolate.SchemaBuilder.Setup.Create(SchemaBuilder builder, LazySchema lazySchema, IDescriptorContext context)
         at HotChocolate.SchemaBuilder.Create(IDescriptorContext context)
         at HotChocolate.SchemaBuilder.HotChocolate.ISchemaBuilder.Create(IDescriptorContext context)
         at HotChocolate.Execution.RequestExecutorResolver.CreateSchemaAsync(String schemaName, RequestExecutorSetup options, RequestExecutorOptions executorOptions, IServiceProvider serviceProvider, TypeModuleChangeMonitor typeModuleChangeMonitor, CancellationToken cancellationToken)
         at HotChocolate.Execution.RequestExecutorResolver.CreateSchemaServicesAsync(String schemaName, RequestExecutorSetup options, CancellationToken cancellationToken)
         at HotChocolate.Execution.RequestExecutorResolver.GetRequestExecutorNoLockAsync(String schemaName, CancellationToken cancellationToken)
         at Microsoft.Extensions.DependencyInjection.HotChocolateStitchingRequestExecutorExtensions.<>c__DisplayClass5_0.<<AddRemoteSchema>b__2>d.MoveNext()
      --- End of stack trace from previous location ---
         at HotChocolate.Execution.RequestExecutorResolver.CreateSchemaAsync(String schemaName, RequestExecutorSetup options, RequestExecutorOptions executorOptions, IServiceProvider serviceProvider, TypeModuleChangeMonitor typeModuleChangeMonitor, CancellationToken cancellationToken)
         at HotChocolate.Execution.RequestExecutorResolver.CreateSchemaServicesAsync(String schemaName, RequestExecutorSetup options, CancellationToken cancellationToken)
         at HotChocolate.Execution.RequestExecutorResolver.GetRequestExecutorNoLockAsync(String schemaName, CancellationToken cancellationToken)
         at HotChocolate.Execution.RequestExecutorResolver.GetRequestExecutorAsync(String schemaName, CancellationToken cancellationToken)
         at HotChocolate.Execution.RequestExecutorProxy.GetRequestExecutorAsync(CancellationToken cancellationToken)
         at HotChocolate.AspNetCore.HttpPostMiddlewareBase.HandleRequestAsync(HttpContext context)
         at HotChocolate.AspNetCore.HttpPostMiddlewareBase.InvokeAsync(HttpContext context)
         at Microsoft.AspNetCore.Builder.EndpointRouteBuilderExtensions.<>c__DisplayClass20_0.<<UseCancellation>b__1>d.MoveNext()
      --- End of stack trace from previous location ---
         at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
         at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

Can you explain how to solve this issue?

Steps to reproduce

1. Create graphql server with
2. Add custom type given above.
3. Create stitching server with hot chocolate
4. Add remote schema
5. Try to access the schema of stitching server

Relevant log output

No response

Additional Context?

No response

Version

13.0.5

[michaelstaib]

Stitching is end of life. You can migrate you project to HotChocolate.Fusion which has out of the box support for json scalars.

[SARAVANA1501]

hi @michaelstaib You mean combining two or three graphql servers is not possible in hot chocolate?

[michaelstaib]

No,

HotChocolate.Stitching is replaced by HotChocolate.Fusion. You are using the old library. https://www.youtube.com/watch?v=peMdejyrKD4

[SARAVANA1501]

While running Getting the same error. After removing all the reference to JObject it is working fine. so seems like some configuration needed in the gateway or gateway graph creation

[SARAVANA1501]

@michaelstaib Any update on this

[michaelstaib]

Create a new issue with a Repro for fusion.