Job enqueue doesn't support generic methods

Hangfire should support it on Sql implementation, but generic method parameters are not serialized into the MongoDB document.

Trying to enqueue a call to a generic method I receive Can not find the target method.

Failed
Can not change the state to 'Processing': target method was not found.

System.ArgumentNullException
Value cannot be null.

System.ArgumentNullException: Value cannot be null.
   at System.Reflection.RuntimeMethodInfo.MakeGenericMethod(Type[] methodInstantiation)
   at Hangfire.Common.TypeExtensions.GetNonOpenMatchingMethod(Type type, String name, Type[] parameterTypes)
   at Hangfire.Storage.InvocationData.Deserialize()

[tmm360]

I didn’t write tests, but I wrote very simple cases where this and another (I think very similar and related) issues appear. On Asp.net Core sample project you can add these lines on HomeController:

public ActionResult FailingOnClient()
{
    BackgroundJob.Enqueue(() => FailingOnClientJob<string>());
    return RedirectToAction("Index");
}
    
public ActionResult FailingOnServer()
{
    BackgroundJob.Enqueue<FailingOnServerJob>(job => job.Run<string>());
    return RedirectToAction("Index");
}
    
public void FailingOnClientJob<T>() { }

public class FailingOnServerJob
{
    public void Run<T>() { }
}

If you invoke the FailingOnServer action you will receive the previously mentioned exception by server execution, but if you call the FailingOnClient action you will get this exception directly on client enqueuing:

System.ArgumentNullException
  HResult=0x80004003
  Message=Value cannot be null.
  Source=System.Private.CoreLib
  StackTrace:
   at System.Reflection.RuntimeMethodInfo.MakeGenericMethod(Type[] methodInstantiation)
   at Hangfire.Common.TypeExtensions.GetNonOpenMatchingMethod(Type type, String name, Type[] parameterTypes)
   at Hangfire.Common.Job.FromExpression(LambdaExpression methodCall, Type explicitType)
   at Hangfire.BackgroundJobClientExtensions.Create(IBackgroundJobClient client, Expression`1 methodCall, IState state)
   at Hangfire.Mongo.Sample.ASPNetCore.Controllers.HomeController.FailingOnClient() in C:\Users\mirko\Desktop\Hangfire.Mongo\src\Hangfire.Mongo.Sample.ASPNetCore\Controllers\HomeController.cs:line 49
   at Microsoft.Extensions.Internal.ObjectMethodExecutor.Execute(Object target, Object[] parameters)
   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeActionMethodAsync>d__12.MoveNext()

[tmm360]

Thank you for your help! You have found my issue, because into my project I don’t have a parameter for each generic type that I pass. I’m using these generic types with an other internal logic, but I’ve actually solved invoking an other not-generic proxy method that takes these types as arguments, and use reflection for invoke the generic one.

If hangfire could serialize also generic types it would be great!