Asp.net 核心 API 方法调用流利 api 验证失败

Question

I have implemented Fluent API validation with Aspnet Core and MediatR and disabled the default MVC validation. Previously, On invalid data, the API validation will be called first and then API method will be called.

On invalid data, Fluent API Validation will throw an error and the call won't fired to the api method.

But now, even on invalid data, the api method is called. what am I missing?

Configuration:

services.AddMvc().AddFluentValidation(fv =>
        {
            fv.RunDefaultMvcValidationAfterFluentValidationExecutes = false;
        });
        ValidatorOptions.Global.CascadeMode = CascadeMode.StopOnFirstFailure;
        services.AddValidatorsFromAssembly(Assembly.GetExecutingAssembly());

Code:

public class LoginCommandValidator : AbstractValidator<LoginCommand>
        {
            public LoginCommandValidator(IStringLocalizer<Resource> stringLocalizer)
            {
                this.CascadeMode = CascadeMode.StopOnFirstFailure;
    
                RuleFor(v => v.Username)
                    .NotEmpty().WithMessage(stringLocalizer["InvalidUsername"])
                    .NotNull().WithMessage(stringLocalizer["InvalidUsername"]);
    
                RuleFor(v=>v.Password)
                    .NotEmpty().WithMessage(stringLocalizer["InvalidPassword"])
                    .NotNull().WithMessage(stringLocalizer["InvalidPassword"]);
            }
        }

Answer 1

Maybe you can write an ActionFilterAttribute, and then add this filter to your Controller. Like this:

 public class ValidateModelStateFilter : ActionFilterAttribute
{
    public override void OnActionExecuting(HttpActionContext actionContext)
    {
        if (!actionContext.ModelState.IsValid)
        {
            actionContext.Response = actionContext.Request.CreteErrorResponse(HttpStatusCode.BadRequest, actionContext.ModelState);
        }
    }
}

Then add this filter above your controller:

[ValidateModelStateFilter]

Hope this can help you.