JsonDocument problem when using [UseProjection]

[alandecastros]

Is there an existing issue for this?

• [X] I have searched the existing issues

Product

Hot Chocolate

Describe the bug

I've tested on the latest version of HotChocolate (13.0.5). The JsonDocument works fine if I don't use the UseProjection attribute. IF I use it I get the following error:

{
  "errors": [
    {
      "message": "Unexpected Execution Error",
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "path": [
        "testes"
      ],
      "extensions": {
        "message": "Type 'System.Text.Json.JsonDocument' does not have a default constructor (Parameter 'type')",
        "stackTrace": "   at System.Linq.Expressions.Expression.New(Type type)\r\n   at HotChocolate.Data.Projections.Expressions.QueryableProjectionScopeExtensions.CreateMemberInit(QueryableProjectionScope scope)\r\n   at HotChocolate.Data.Projections.Expressions.Handlers.QueryableProjectionFieldHandler.TryHandleLeave(QueryableProjectionContext context, ISelection selection, ISelectionVisitorAction& action)\r\n   at HotChocolate.Data.Projections.ProjectionVisitor`1.Leave(ISelection selection, TContext context)\r\n   at HotChocolate.Data.Projections.SelectionVisitor`1.Visit(ISelection selection, TContext context)\r\n   at HotChocolate.Data.Projections.SelectionVisitor`1.VisitObjectType(IOutputField field, ObjectType objectType, ISelection selection, TContext context)\r\n   at HotChocolate.Data.Projections.Expressions.QueryableProjectionVisitor.VisitObjectType(IOutputField field, ObjectType objectType, ISelection selection, QueryableProjectionContext context)\r\n   at HotChocolate.Data.Projections.SelectionVisitor`1.VisitChildren(IOutputField field, TContext context)\r\n   at HotChocolate.Data.Projections.SelectionVisitor`1.Visit(IOutputField field, TContext context)\r\n   at HotChocolate.Data.Projections.ProjectionVisitor`1.Visit(IOutputField field, TContext context)\r\n   at HotChocolate.Data.Projections.ProjectionVisitor`1.Visit(TContext context, ISelection selection)\r\n   at HotChocolate.Data.Projections.Expressions.QueryableProjectionProvider.<CreateApplicator>b__7_0[TEntityType](IResolverContext context, Object input)\r\n   at HotChocolate.Data.Projections.Expressions.QueryableProjectionProvider.<>c__DisplayClass4_0`1.<<CreateExecutor>g__ExecuteAsync|1>d.MoveNext()\r\n--- End of stack trace from previous location ---\r\n   at HotChocolate.Data.ToListMiddleware`1.InvokeAsync(IMiddlewareContext context)\r\n   at HotChocolate.Resolvers.Expressions.Parameters.ServiceHelper.<>c__DisplayClass7_3`1.<<UseResolverServiceInternal>b__5>d.MoveNext()\r\n--- End of stack trace from previous location ---\r\n   at HotChocolate.Resolvers.Expressions.Parameters.ServiceHelper.<>c__DisplayClass7_1`1.<<UseResolverServiceInternal>b__3>d.MoveNext()\r\n--- End of stack trace from previous location ---\r\n   at HotChocolate.Execution.Processing.Tasks.ResolverTask.ExecuteResolverPipelineAsync(CancellationToken cancellationToken)\r\n   at HotChocolate.Execution.Processing.Tasks.ResolverTask.TryExecuteAsync(CancellationToken cancellationToken)"
      }
    }
  ]
}

Steps to reproduce

https://github.com/glen-84/hc-5893 (.NET 8, HC 13.8.1)

1. Create a query using [UseProjection]
2. The model that is returned must have a JsonDocument attribute

Relevant log output

No response

Additional Context?

No response

Version

13.0.5

[michaelstaib]

Your issue needs a repro for us to help you.

[alandecastros]

Sure @michaelstaib ! Thanks for the fast response.

// Program.cs
builder.Services
    .AddGraphQLServer()
    .RegisterDbContext<AppDbContext>()
    .AddProjections()
    .AddQueryType<Query>();

// Query.cs
public class TestModel
{
    public string Codigo { get; set; } = Guid.NewGuid().ToString();
    public JsonDocument? Data { get; set; }
}

public class Query
{
    [UseProjection]
    public IQueryable<TestModel> GetTests(AppDbContext context) =>
        context.Set<TestModel>();

    public IQueryable<TestModel> GetTests2(AppDbContext context) =>
        context.Set<TestModel>();
}

This works

{
  tests2 {
    codigo
    data {
      rootElement
    }
  }
}

Correct output

{
  "data": {
    "tests2": [
      {
        "codigo": "0d14d05f-8bf2-42dc-a829-ccf36ea778cf",
        "data": {
          "rootElement": "{\"a\": 1}"
        }
      },
      {
        "codigo": "18ab0a12-cc63-45ba-a03b-5e16a1924c41",
        "data": {
          "rootElement": "{\"a\": 1}"
        }
      },
      {
        "codigo": "6ba887dc-85c7-4c45-bfb2-1dccba34e6f7",
        "data": {
          "rootElement": "{\"a\": 1}"
        }
      },
      {
        "codigo": "b55483da-2507-45dc-90fc-21cd6bfb0058",
        "data": {
          "rootElement": {
            "a": 223
          }
        }
      },
      {
        "codigo": "345545445345453",
        "data": null
      }
    ]
  }
}

This does not work

{
  tests {
    codigo
    data {
      rootElement
    }
  }
}

I get the following error:

{
  "errors": [
    {
      "message": "Unexpected Execution Error",
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "path": [
        "tests"
      ],
      "extensions": {
        "message": "Type 'System.Text.Json.JsonDocument' does not have a default constructor (Parameter 'type')",
        "stackTrace": "   at System.Linq.Expressions.Expression.New(Type type)\r\n   at HotChocolate.Data.Projections.Expressions.QueryableProjectionScopeExtensions.CreateMemberInit(QueryableProjectionScope scope)\r\n   at HotChocolate.Data.Projections.Expressions.Handlers.QueryableProjectionFieldHandler.TryHandleLeave(QueryableProjectionContext context, ISelection selection, ISelectionVisitorAction& action)\r\n   at HotChocolate.Data.Projections.ProjectionVisitor`1.Leave(ISelection selection, TContext context)\r\n   at HotChocolate.Data.Projections.SelectionVisitor`1.Visit(ISelection selection, TContext context)\r\n   at HotChocolate.Data.Projections.SelectionVisitor`1.VisitObjectType(IOutputField field, ObjectType objectType, ISelection selection, TContext context)\r\n   at HotChocolate.Data.Projections.Expressions.QueryableProjectionVisitor.VisitObjectType(IOutputField field, ObjectType objectType, ISelection selection, QueryableProjectionContext context)\r\n   at HotChocolate.Data.Projections.SelectionVisitor`1.VisitChildren(IOutputField field, TContext context)\r\n   at HotChocolate.Data.Projections.SelectionVisitor`1.Visit(IOutputField field, TContext context)\r\n   at HotChocolate.Data.Projections.ProjectionVisitor`1.Visit(IOutputField field, TContext context)\r\n   at HotChocolate.Data.Projections.ProjectionVisitor`1.Visit(TContext context, ISelection selection)\r\n   at HotChocolate.Data.Projections.Expressions.QueryableProjectionProvider.<CreateApplicator>b__7_0[TEntityType](IResolverContext context, Object input)\r\n   at HotChocolate.Data.Projections.Expressions.QueryableProjectionProvider.<>c__DisplayClass4_0`1.<<CreateExecutor>g__ExecuteAsync|1>d.MoveNext()\r\n--- End of stack trace from previous location ---\r\n   at HotChocolate.Data.ToListMiddleware`1.InvokeAsync(IMiddlewareContext context)\r\n   at HotChocolate.Resolvers.Expressions.Parameters.ServiceHelper.<>c__DisplayClass7_3`1.<<UseResolverServiceInternal>b__5>d.MoveNext()\r\n--- End of stack trace from previous location ---\r\n   at HotChocolate.Resolvers.Expressions.Parameters.ServiceHelper.<>c__DisplayClass7_1`1.<<UseResolverServiceInternal>b__3>d.MoveNext()\r\n--- End of stack trace from previous location ---\r\n   at HotChocolate.Execution.Processing.Tasks.ResolverTask.ExecuteResolverPipelineAsync(CancellationToken cancellationToken)\r\n   at HotChocolate.Execution.Processing.Tasks.ResolverTask.TryExecuteAsync(CancellationToken cancellationToken)"
      }
    }
  ]
}

[michaelstaib]

Is ef core able to project json documents like that?

[alandecastros]

@michaelstaib I've just tested this out:

var q = context.Set<TestModel>().Select(x => 
            x.Data != null
                ? (JsonElement?)x.Data.RootElement
                : null
        );

And it works fine in EF Core.

[glen-84]

@alandecastros Your repro is incomplete – which DB provider are you using?

[alandecastros]

@glen-84 I've just made a more complete repro using HotChocolate 13.8.1

//Program.cs

using HotChocolateBugRepro;
using Microsoft.EntityFrameworkCore;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddDbContext<AppDbContext>(options =>
{
    options.UseNpgsql("User ID=postgres;Password=postgres;Host=localhost;Port=5432;Database=postgres;Pooling=true")
        .EnableSensitiveDataLogging();
});

builder.Services
    .AddGraphQLServer()
    .RegisterDbContext<AppDbContext>()
    .AddProjections()
    .AddQueryType<Query>();

// Add services to the container.

var app = builder.Build();

// Configure the HTTP request pipeline.

app.MapGraphQL();

app.Run();

public partial class Program { }

//AppDbContext.cs

public class AppDbContext : DbContext
{
    public AppDbContext(DbContextOptions<AppDbContext> options) : base(options)
    {
    }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.ApplyConfigurationsFromAssembly(typeof(Program).Assembly);
    }
}

// UsuarioModel.cs

public class UsuarioModel
{
    public string Codigo { get; set; } = Guid.NewGuid().ToString();
    public JsonDocument? Data { get; set; }
}

public class UsuarioModelConfig : IEntityTypeConfiguration<UsuarioModel>
{
    public void Configure(EntityTypeBuilder<UsuarioModel> builder)
    {
        builder.ToTable("usuario");

        builder.HasKey(x => x.Codigo);

        builder.Property(x => x.Codigo)
            .HasColumnName("usua_cd_usuario");

        builder.Property(x => x.Data)
            .HasColumnName("usua_json_data");
    }
}

// Query.cs

public class Query
{
    [UseProjection]
    public IQueryable<UsuarioModel> GetUsuarios(AppDbContext context) =>
    context.Set<UsuarioModel>();

    public IQueryable<UsuarioModel> GetUsuarios2(AppDbContext context) =>
        context.Set<UsuarioModel>();
}

Packages HotChocolate.AspNetCore 13.8.1 HotChocolate.Data.EntityFramework 13.8.1 Npgsql.EntityFrameworkCore.PostgreSQL 8.0.0

Queries & results

Query that works (without UseProjection)

{
    usuarios2 {
      codigo
      data {
        rootElement
      }
    }
}

///

{
  "data": {
    "usuarios2": [
      {
        "codigo": "08db053c-6de4-c931-c84b-d66385540000",
        "data": {
          "rootElement": {
            "a": 1,
            "b": "2",
            "c": {
              "d": 1,
              "e": "f"
            }
          }
        }
      }
    ]
}

Query that does not work (using UseProjection)

{
    usuarios {
      codigo
      data {
        rootElement
      }
    }
}

///

{
  "errors": [
    {
      "message": "Unexpected Execution Error",
      "locations": [
        {
          "line": 2,
          "column": 5
        }
      ],
      "path": [
        "usuarios"
      ],
      "extensions": {
        "message": "Type 'System.Text.Json.JsonDocument' does not have a default constructor (Parameter 'type')",
        "stackTrace": "   at System.Linq.Expressions.Expression.New(Type type)\r\n   at HotChocolate.Data.Projections.Expressions.QueryableProjectionScopeExtensions.CreateMemberInit(QueryableProjectionScope scope)\r\n   at HotChocolate.Data.Projections.Expressions.Handlers.QueryableProjectionFieldHandler.TryHandleLeave(QueryableProjectionContext context, ISelection selection, ISelectionVisitorAction& action)\r\n   at HotChocolate.Data.Projections.ProjectionVisitor`1.Leave(ISelection selection, TContext context)\r\n   at HotChocolate.Data.Projections.SelectionVisitor`1.Visit(ISelection selection, TContext context)\r\n   at HotChocolate.Data.Projections.ProjectionVisitor`1.Visit(ISelection selection, TContext context)\r\n   at HotChocolate.Data.Projections.SelectionVisitor`1.VisitObjectType(IOutputField field, ObjectType objectType, ISelection selection, TContext context)\r\n   at HotChocolate.Data.Projections.Expressions.QueryableProjectionVisitor.VisitObjectType(IOutputField field, ObjectType objectType, ISelection selection, QueryableProjectionContext context)\r\n   at HotChocolate.Data.Projections.SelectionVisitor`1.VisitChildren(IOutputField field, TContext context)\r\n   at HotChocolate.Data.Projections.SelectionVisitor`1.Visit(IOutputField field, TContext context)\r\n   at HotChocolate.Data.Projections.ProjectionVisitor`1.Visit(IOutputField field, TContext context)\r\n   at HotChocolate.Data.Projections.ProjectionVisitor`1.Visit(TContext context, ISelection selection)\r\n   at HotChocolate.Data.Projections.ProjectionVisitor`1.Visit(TContext context)\r\n   at HotChocolate.Data.Projections.Expressions.QueryableProjectionProvider.<CreateApplicator>b__7_0[TEntityType](IResolverContext context, Object input)\r\n   at HotChocolate.Data.Projections.Expressions.QueryableProjectionProvider.<>c__DisplayClass4_0`1.<<CreateExecutor>g__ExecuteAsync|1>d.MoveNext()\r\n--- End of stack trace from previous location ---\r\n   at HotChocolate.Data.ToListMiddleware`1.InvokeAsync(IMiddlewareContext context)\r\n   at HotChocolate.Resolvers.Expressions.Parameters.ServiceHelper.<>c__DisplayClass7_3`1.<<UseResolverServiceInternal>b__5>d.MoveNext()\r\n--- End of stack trace from previous location ---\r\n   at HotChocolate.Resolvers.Expressions.Parameters.ServiceHelper.<>c__DisplayClass7_1`1.<<UseResolverServiceInternal>b__3>d.MoveNext()\r\n--- End of stack trace from previous location ---\r\n   at HotChocolate.Execution.Processing.Tasks.ResolverTask.ExecuteResolverPipelineAsync(CancellationToken cancellationToken)\r\n   at HotChocolate.Execution.Processing.Tasks.ResolverTask.TryExecuteAsync(CancellationToken cancellationToken)"
      }
    }
  ]
}

When calling the second query HotChocolate doesn't even send an SQL to the database.

Regards

[glen-84]

Thanks, I've added a link to a minimal reproduction under the Steps to reproduce section in the initial comment.