Dependency injection 用于ValidationAttribute的Autofac和DI
我有以下验证属性类:Dependency injection 用于ValidationAttribute的Autofac和DI,dependency-injection,autofac,validationattribute,test-project,Dependency Injection,Autofac,Validationattribute,Test Project,我有以下验证属性类: public class ZipCodeValidationAttribute : ValidationAttribute { private readonly IValidationRepository _repository; public override bool IsValid(object value) { var repository = _repository; return repository.
public class ZipCodeValidationAttribute : ValidationAttribute
{
private readonly IValidationRepository _repository;
public override bool IsValid(object value)
{
var repository = _repository;
return repository.IsPostalCodeValid((string) value);
}
}
为了进行测试,我尝试使用Autofac作为IOC,并使用属性注入。我已按如下方式设置了测试:
[TestMethod]
public void When_PostalCodeAttribute_Given_ValidPostalCode_Then_SystemReturnsTrue()
{
// arrange
var value = "53051";
var containerBuilder = new ContainerBuilder();
containerBuilder.RegisterType<ValidationRepository>().As<IValidationRepository>().InstancePerDependency();
containerBuilder.RegisterType<ZipCodeValidationAttribute>().PropertiesAutowired();
var container = containerBuilder.Build();
var attrib = container.Resolve<ZipCodeValidationAttribute>();
// act
var result = attrib.IsValid(value);
// assert
Assert.IsTrue(result);
}
[TestMethod]
当“PostalCode属性”被赋予“ValidPostalCode”然后“SystemReturnsTrue()时,公共无效
{
//安排
var value=“53051”;
var containerBuilder=新的containerBuilder();
containerBuilder.RegisterType().As().InstancePerDependence();
containerBuilder.RegisterType().PropertiesAutowired();
var container=containerBuilder.Build();
var attrib=container.Resolve();
//表演
var result=attrib.IsValid(值);
//断言
断言(结果);
}
在测试期间,未解析我的存储库。Autofac新手,希望有人能为我指出正确的方向。您需要将
存储库声明为Autofac自动连接的属性
public class ZipCodeValidationAttribute : ValidationAttribute
{
public IValidationRepository Repository { get; set; }
public override bool IsValid(object value)
{
return Repository .IsPostalCodeValid((string) value);
}
}
我在中解决了整个问题(在Validator.TryValidate
etc/ASP.NET MVC等的控制下触发DI),使一个人能够编写:
class MyModel
{
...
[Required, StringLength(42)]
[ValidatorService(typeof(MyDiDependentValidator), ErrorMessage = "It's simply unacceptable")]
public string MyProperty { get; set; }
....
}
public class MyDiDependentValidator : Validator<MyModel>
{
readonly IUnitOfWork _iLoveWrappingStuff;
public MyDiDependentValidator(IUnitOfWork iLoveWrappingStuff)
{
_iLoveWrappingStuff = iLoveWrappingStuff;
}
protected override bool IsValid(MyModel instance, object value)
{
var attempted = (string)value;
return _iLoveWrappingStuff.SaysCanHazCheez(instance, attempted);
}
}
还是让我伤心。存储库仍然为null且未解析,因为该属性是私有的。一旦我把它公之于众,一切都是一致的。格拉齐!我也有同样的问题@mservais您需要取消接受此项,因为它具有误导性。Autofac没有办法注入参与模型的模型所承担的实际ValidationAttribute
sbinding@Eranga虽然这个答案只是回答了这个问题,并且回答正确,但对于我来说,IRL的问题是实例化不是由Autofac完成的。因此,虽然我们有一个通过测试的解决方案,但胜利是没有意义的。对我来说,您的答案应该是或至少是这样的:请注意,通过此测试实际上不会让Autofac在任何有用的上下文中使用该属性
DataAnnotationsModelValidatorProvider.RegisterAdapterFactory(
typeof(ValidatorServiceAttribute),
(metadata, context, attribute) =>
new DataAnnotationsModelValidatorEx(metadata, context, attribute, true));