Question

您好我很难将HTTP范围对象传递给流畅的验证验证程序。一切正常，直到我尝试注入服务，然后它抛出以下错误

从中可以看到没有与“AutofacWebRequest”匹配的标记的范围请求实例的范围。这通常表明正在请求按照HTTP请求注册的组件一个SingleInstance（）组件

它归结为我认为的以下片段，我不知道如何在webapi中模仿它

 public Func<T> HttpRequestScopedFactoryFor<T>(){
       return () => system.Web.Mvc.DependencyResolver.Current.GetService<T>();
  }

在MVC中我的autofac代码看起来像这样

    public class FluentValidationModule : Module
    {
                public Func<T> HttpRequestScopedFactoryFor<T>()
                {
                    return () => System.Web.Mvc.DependencyResolver.Current.GetService<T>();
                }

                protected override void Load(ContainerBuilder builder)
                {
                    base.Load(builder);
                    builder.RegisterType<ApplicationDbContext>().AsSelf().InstancePerRequest();
                    builder.RegisterInstance(HttpRequestScopedFactoryFor<ApplicationDbContext>());
                }
        }
     }

我的FluentValidation验证码看起来像是这样

public class RoleDTOValidator : AbstractValidator<RoleDTO>
    {
        readonly Func<ApplicationDbContext> _dbFactory;
        public RoleDTOValidator(Func<ApplicationDbContext> dbFactory)
        {
            _dbFactory = dbFactory;
            RuleFor(m => m.Id).NotEmpty();
            RuleFor(m => m.Name).NotEmpty().Must(DoesNotExist).WithMessage("Another permission exists with that name."); ;
            RuleFor(m => m.Description).NotEmpty();
            RuleFor(m => m.Permissions).NotEmpty().SetCollectionValidator(new ApplicationRoleClaimValidator());
        }

        bool DoesNotExist(RoleDTO model, string name)
        {
            ApplicationDbContext db = _dbFactory();
            int count = db.Roles.Count(item => item.Name == name);
            return count == 0;
        }
    }

非常感谢任何帮助。

webapi - dbcontext注入到fluentvalidation验证器

0 个答案: