FluentValidation - pre-validation / conditional validation with no code duplication

Question

I'm trying to create Validation which is able to have two groups and block second validation if first fail (it contains many rules).

For now I did create a private 'BasicValidation' class inside and in 'main validator' do sth like this:

RuleFor(m => m).SetValidator(new BasicValidation()).DependentRules(() => {
//Complex validation
RuleFor(m => m.IdOfSthInDb)
    .MustAsync(ItemMustExists)
    .WithMessage("Item does not exist.");
});            

It does the trick but I would like to avoid creating that 'BasicValidation' for each model.

Answer 1

I think hext code would solve your problem:

var basicValidator = new BasicValidation();
RuleFor(m => m).SetValidator(basicValidator));

When(m => basicValidator.Validate(m).IsValid, () => 
{
    RuleFor(m => m.IdOfSthInDb)
        .MustAsync(ItemMustExists)
        .WithMessage("Item does not exist.");
});