How to handle char property properly in Hotchocolate Graphql 12.0? - graphql

Question

I am trying to implement filtering on Resource table which has MartialStatus of char property in DDL of database.Let my show you my approach first. In my program.cs file, i have the following:
using LIS.ResourcePlanningSystem.API;
using LIS.ResourcePlanningSystem.Data;
using Microsoft.EntityFrameworkCore;
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
builder.Services.AddDbContext<RpsDbContext>(options => options.UseLazyLoadingProxies().UseNpgsql(builder.Configuration.GetConnectionString("RPSDbContext")));
builder.Services.AddGraphQLServer().
RegisterDbContext<RpsDbContext>().
AddQueryType<Query>().
AddProjections().
AddFiltering().
AddSorting().
BindRuntimeType<char, StringType>().
AddTypeConverter<char, string>(from => from.ToString()).
AddTypeConverter<string, char>(from => from.ToCharArray()[0]);
var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseHttpsRedirection();
app.UseAuthorization();
app.MapControllers();
app.MapGraphQL("/graphql");
app.Run();
Here is my a model Register.cs which has "MaritalStatus" char property.
public class Resource
{
public int Id { get; set; }
public string? FirstName { get; set; }
public string? MiddleName { get; set; }
public string? LastName { get; set; }
public string? FullName { get; set; }
public char? MaritalStatus { get; set; }
public virtual Gender? Gender { get; set; }
public virtual Education? Education { get; set; }
public int? InstitutionId { get; set; }
public string? PerStreet { get; set; }
public DateTime? OfficeJoinDt { get; set; }
public virtual Grade? Grade { get; set; }
public int? PositionId { get; set; }
public virtual Department? Department { get; set; }
public virtual ClientType? ClientType{ get; set; }
public int? ExpOut { get; set; }
public string? ResignedFlag { get; set; }
public string? Email { get; set; }
public virtual BloodGroup? BloodGroup { get; set; }
public virtual ResignedRemarks? ResignedRemark { get; set; }
public virtual Source? Source { get; set; }
}
Now, the program runs just fine until i add [UseFiltering] on the Resource table in query.cs file.
[UseFiltering]
[UseSorting]
public IQueryable<Resource>? GetResources(RpsDbContext context) => context.Resources;
The error i am getting is this:
HotChocolate.SchemaException: For more details look at the `Errors` property.
1. For more details look at the `Errors` property.
1. The type of the member MaritalStatus of the declaring type Resource is unknown
If i remove the [UseFiltering] [UseSorting], the program works fine. I think the problem is related to filtering on resource table. Filtering also work fine on all the other tables which doesn't have char property in its schema definition. Someone has opened a bug issue on github [here] . Tried to solve reading this issue but no luck. Could somebody please tell me how can i get around this problem?