Validating collections with FluentValidation

Question

I am trying to do something like this :

RuleFor(client => client.PriceCustomization.GroupBy(a=>a.ProductId).Select(a => a.ToList()))
   .SetCollectionValidator(new PriceCustomizationsForProductValidator());

But I am receiving this error : Failed: System.InvalidOperationException : Nested validators can only be used with Member Expressions.

"PriceCustomizationsForProductValidator" is a validator for a List of "PriceCustomization"

Does anyone have any idea how could I solve this?

Answer 1

Using FluentValidation version 8, try this:

RuleForEach(client => client.PriceCustomization)
   .SetValidator(new PriceCustomizationsForProductValidator());

See https://fluentvalidation.net/upgrading-to-8.html