How to call validation manually for a field or property.

[mishael-o]

Hi, I have a scenario where I would want to revalidate a property when another property has changed.

Example
DateFrom and DateTo properties. When DateFrom changes I want to call validations for DateTo and vice versa to ensure their states is in sync.

I see the FluentValidationValidator exposes Validate and ValidateAsync however there is no API validating a property.

[Sharaf-Mansour]

@mishael-o
Maybe you are looking for something like this

    public  bool IsDateFromValid() => new DateValidator().Validate(DateFrom).IsValid;

Then call the function in the other abstract validator using Must or MustAsync
Or you can even do something like

   public class FooValidator : AbstractValidator<Foo>
    {
         DateTime dateFrom , dateTo;
         publicFooValidator()
         {
            RuleFor(x => x.DateFrom)
                              .Must(date =>  new DateValidator.Validate(dateFrom = date).IsValid)
                              .WithMessage("SomeMsg");
            RuleFor(x => x.DateTo)
                             .Must(date =>  new DateValidator().Validate(dateFrom).IsValid &&  
                                            new DateValidator().Validate(dateTo = date).IsValid)
                             .WithMessage("SomeMsg");
        }
    }

[mishael-o]

Hi @Sharaf-Mansour, thanks for the suggestion, I will check it out.