Asp.net Core 2.1中具有IActionFilter的FluentValidation

Question

我使用最新的FluentValidation.AspNetCore（8.0.0）和Asp.net core（2.1.0）。我像下面那样实现了IActionFilter。

public class MyActionFilter : IActionFilter
{
    public void OnActionExecuted(ActionExecutedContext context)
    {
        var a = context.ModelState.IsValid;
    }

    public void OnActionExecuting(ActionExecutingContext context)
    {
        var a = context.ModelState.IsValid;
    }
}

和下面定义的我的请求模型。

public class Class1
{
    public int Id { get; set; }
}

public class Class1Validator : AbstractValidator<Class1>
{
    public Class1Validator()
    {
        RuleFor(w => w.Id).GreaterThan(2);
    }
}

下面是我在控制器中的动作。

[Route("api/[controller]")]
[ApiController]
public class ValuesController : ControllerBase
{
    // GET api/values
    [HttpGet]
    public ActionResult<IEnumerable<string>> Get(Class1 c1)
    {
        return new string[] { "value1", "value2" };
    }

    [HttpPost, Route("post1")]
    public IActionResult Post([FromBody]Class1 c1)
    {
        return Ok(c1);
    }
}

以下是我在启动中的ConfigureServices

public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc(opt =>
        {
            opt.Filters.Add<MyActionFilter>();
        })
        .SetCompatibilityVersion(CompatibilityVersion.Version_2_1)
        .AddFluentValidation(cfg =>
        {
            cfg.RegisterValidatorsFromAssemblyContaining<Class1Validator>();
        });
        services.AddSwaggerGen(c =>
        {
            c.SwaggerDoc("v1", new Info { Title = "My API", Version = "v1" });
        });
    }

当我发布/api/values/post1时，它直接返回{"Id": ["'Id' must be greater than '2'." ]}而没有进入OnActionExecuting上的MyActionFilter，我该如何使其进入“ MyActionFilter”自定义代码。