Ability to set rules on collection elements.

It would be nice to be able to recursively add rules on collection item properties.

      RuleForEach(s => s.Administrators)
        .RuleFor(c => c.Username, 
          r => r.NotEmpty()
                .EmailAddress());       

[JeremySkinner]

Yes, this is doable. Instead of using RuleForEach, use RuleFor with a ChildCollectionValidatorAdaptor. This will keep the correct property names and indicies.

public static class MyValidatorExtensions {
    public static void NestedRules<T, TCollectionElement>(this IRuleBuilder<T, IEnumerable<TCollectionElement>> ruleBuilder, Action<InlineValidator<TCollectionElement>> setup) {
        var inlineValidator = new InlineValidator<TCollectionElement>();
        setup(inlineValidator);
        var adaptor = new ChildCollectionValidatorAdaptor(inlineValidator);
        ruleBuilder.SetValidator(adaptor);
    }
}

Useable like this:

public class MyValidator : AbstractValidator<Person> {
    public MyValidator() {
        RuleFor(x => x.Orders).NestedRules(v => {
            v.RuleFor(order => order.ProductName).NotNull();
            //etc
        });
    }
}

[shlok57]

Is this functionality added?