The type initializer for 'FastEndpoints.RequestBinder`1' threw an exception.

[Miatrix]

I have FastEndpoints working for requests with 1 item, however I'm trying to add an endpoint that will accept a list of items to add/update. Any idea what I'm doing wrong?

Request:

[
    {
        "setting": "TestSetting1234",
        "value": "TestValue9876"
    },
    {
        "setting": "TestSetting2345",
        "value": "TestValue98761"
    }
]

Endpoint code

public class MyEndpoint : Endpoint<MyEndpointCommand>
{
    public override void Configure()
    {
        Post("/settings/all2");
        Roles("Admin");
    }

    public override async Task HandleAsync(MyEndpointCommand req, CancellationToken ct)
    {
        var response = new List<Site>()
        {
            new() {Id = 1, Setting = "1234", UpdatedDate = DateTime.Now, Value = "abc"},
            new() {Id = 2, Setting = "2345", UpdatedDate = DateTime.Now, Value = "abcd"},
        };

        await SendAsync(response, 200, ct);
    }
}

public sealed class MyEndpointCommand : List<Site>
{
}

Error Message:

HTTP: POST /api/v1/settings/all2
TYPE: TypeInitializationException
REASON: The type initializer for 'FastEndpoints.RequestBinder`1' threw an exception.
---------------------------------
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
   at System.Reflection.ConstructorInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)
   at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitRootCache(ServiceCallSite callSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.CreateServiceAccessor(Type serviceType)
   at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
   at FastEndpoints.ServiceResolver.Resolve(Type typeOfService)
   at FastEndpoints.Endpoint`2.BindRequestAsync(EndpointDefinition def, HttpContext ctx, List`1 failures, CancellationToken ct)
   at FastEndpoints.Endpoint`2.ExecAsync(CancellationToken ct)
   at FastEndpoints.Endpoint`2.ExecAsync(CancellationToken ct)
   at NSwag.AspNetCore.Middlewares.SwaggerUiIndexMiddleware.Invoke(HttpContext context)
   at NSwag.AspNetCore.Middlewares.RedirectToIndexMiddleware.Invoke(HttpContext context)
   at NSwag.AspNetCore.Middlewares.OpenApiDocumentMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddlewareImpl.<Invoke>g__Awaited|8_0(ExceptionHandlerMiddlewareImpl middleware, HttpContext context, Task task)
[04-21 08:12:49 ERR 127.0.0.1 PostmanRuntime/7.31.3] HTTP POST /api/v1/settings/all2 responded 500 in 17.2545 ms

[dj-nitehawk]

just make List<Site> the TRequest of the endpoint like so:

public class MyEndpoint : Endpoint<List<Site>>
{
    public override async Task HandleAsync(List<Site> req, CancellationToken ct)
    {

    }
}

[Miatrix]

List works but creating a class that inherits from List does not work.

This Works:

public class MyEndpoint : Endpoint<MyEndpointCommand>
{
    public override void Configure()
    {
        Post("/settings/all2");
        Roles("Admin");
    }

    public override async Task HandleAsync(MyEndpointCommand req, CancellationToken ct)
    {
        var response = new List<Site>()
        {
            new() {Id = 1, Setting = "1234", UpdatedDate = DateTime.Now, Value = "abc"},
            new() {Id = 2, Setting = "2345", UpdatedDate = DateTime.Now, Value = "abcd"},
        };

        await SendAsync(response, 200, ct);
    }
}

public sealed class MyEndpointCommand 
{
    public List<Site> Data { get; set; }
    public uint RequestUserId { get; set; }
    public bool RequestIsAdmin { get; set; }
    public string RequestUserName { get; set; }
}

Changing MyEndpointCommand to

public sealed class MyEndpointCommand : List<Site>
{
    public uint RequestUserId { get; set; }
    public bool RequestIsAdmin { get; set; }
    public string RequestUserName { get; set; } 
}

Does not work. However this also will work (Not with the list but with just 1):

public sealed class MyEndpointCommand : Site
{
    public uint RequestUserId { get; set; }
    public bool RequestIsAdmin { get; set; }
    public string RequestUserName { get; set; } 
}

I can add the Data but it seams like inheriting from List should work

[dj-nitehawk]

added support for inherited IEnumerable<T> request DTO binding from a json array request body in 5.8.1.15-beta.
this is now supported:

public sealed class MyEndpointCommand : List<Site> { }

however this is not:

public sealed class MyEndpointCommand : List<Site>
{
    public uint RequestUserId { get; set; }
    public bool RequestIsAdmin { get; set; }
    public string RequestUserName { get; set; } 
}

this essentially makes it bindable as a json object and not a json array and the inheritance of List<Site> goes out the door from the perspective of binding a json array. it is also not supported by minimal endpoints, swagger nor STJ.

i.e. this cannot be done with app.MapPost("/", (MyEndpointCommand r) => Results.Ok(r)); either.