我正在使用：MediatR 12.1.1 FluentValidation 11.6.0
我创建了我的验证器：

internal class CreateTemplateCommandValidator : AbstractValidator<CreateTemplateCommand>
{
    public CreateTemplateCommandValidator(ITemplateRepository templateRepository)
    {
        RuleFor(template => template.Name)
            .NotEmpty()
            .DependentRules(() =>
        {
            RuleFor(template => template.Name)
                .MustAsync(async (name, token) => !(await templateRepository.NameExists(name)))
                .WithMessage("Name must be unique.");
        });
    }
}

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我希望通过MediatR管道处理验证。这是我的ValidationBehavior类：

public class ValidationBehavior<TRequest, TResponse> : IPipelineBehavior<TRequest, TResponse>
    where TRequest : IRequest<TResponse>
{
    private readonly IEnumerable<IValidator<TRequest>> _validators;

    public ValidationBehavior(IEnumerable<IValidator<TRequest>> validators)
    {
        _validators = validators;
    }

    public async Task<TResponse> Handle(
        TRequest request,
        RequestHandlerDelegate<TResponse> next,
        CancellationToken cancellationToken)

    {
        var context = new ValidationContext<TRequest>(request);

        var failures = _validators
            .Select(validator => validator.Validate(context))
            .SelectMany(result => result.Errors)
            .Where(failure => failure is not null)
            .ToList();

        if (failures.Any())
        {
            throw new ValidationException(failures);
        }

        return await next();
    }
}

型
我还注册了这些：

services.AddMediatR(cfg =>
        {
            cfg.RegisterServicesFromAssembly(typeof(Extension).Assembly);
        });

        services.AddValidatorsFromAssemblyContaining(typeof(Extension));
        services.AddTransient(typeof(IPipelineBehavior<,>), typeof(ValidationBehavior<,>));

型
不幸的是，验证器从未被调用。我被卡住了，因为我在其他地方找不到答案，似乎我已经正确地遵循了模式-我错过了什么？