fluentvalidation

I have the following viewmodel definition public class AccessRequestViewModel { public Request Request { get; private set; } public SelectList Buildings { get; private set; } public List<Person> Persons { get; private set; } } So in my application there must be at least 1 person for an access request. What approach might you use to validate? I don't want this validation to happen in my controller which would be simple to do. Is the only choice a custom validation attribute? Edit: Currently performing this validation with FluentValidation (nice library!) RuleFor(vm => vm.Persons) .Must((vm,

I am using FluentValidation to validate my service operations. My code looks like: using FluentValidation; IUserService { void Add(User user); } UserService : IUserService { public void Add(User user) { new UserValidator().ValidateAndThrow(user); userRepository.Save(user); } } UserValidator implements FluentValidation.AbstractValidator. DDD says that domain layer have to be technology independent. What I am doing is using a validation framework instead of custom exceptions. It's a bad idea to put validation framework in the domain layer? Just like the repository abstraction? Well, I see a few