Welcome to the Lounge

BillWoodruff wrote:

with some of Marc Clifton's interesting articles here.

RuleFor(customer => customer.Discount).NotEqual(0).When(customer => customer.HasDiscount);

var step1 = RuleFor(customer => customer.Discount);
var step2 = step1.NotEqual(0);
var step3 = step2.When(customer => customer.HasDiscount);

Disclaimer: the working code shown here reflects the initial efforts of a newcomer to using FluentValidation. The code shown probably does not demonstrate "best practices" in using that tool. The "take-away" I would like you to have is that: if someone like me can quickly bumble their way to something that smells like it could be useful ... so easily, so rapidly ... than: you (my technical "betters") will probably have an even easier time.

Marc Clifton wrote:

Besides, what if you want to change:
customer => customer.HasDiscount to customer => customer.HasDiscount || store.OffersPromotionDeal ?

// suggested by Marc Clifton:
// Besides, what if you want to change:
// customer => customer.HasDiscount to
// customer => customer.HasDiscount || store.OffersPromotionDeal ?

// Store object
public class Store
{
    public string Name { set; get; }

    public bool OffersPromotionalDeal { set; get; }

    public Store(string name, bool offerspromo)
    {
        Name = name;
        OffersPromotionalDeal = offerspromo;
    }
}

// Store Validator
public class StoreValidator : AbstractValidator<Store>
{
    public StoreValidator()
    {
        RuleFor(store => store.OffersPromotionalDeal);
    }

    // stub
    public bool OffersPromotionalDeal(bool isoffered)
    {
        return isoffered;
    }
}

public List<Store> CurrentStores = new List<Store>();
public Store CurrentCustomerStore { set; get; }

// added by bw
// edited to add custom error message over-rides
RuleFor(customer => customer.HasDiscount).Must(disc => disc == true).WithMessage("Customer must have a current Discount");
RuleFor(customer => customer.Discount).LessThan(100).WithMessage("Discount must be less than 100%");
RuleFor(customer => customer.CurrentStore).NotNull().WithMessage("Customer must have a Current Store");
RuleFor(customer => customer.CurrentStore.OffersPromotionalDeal).Must(deal => deal == true).WithMessage("Current Store must have a current promotional offer");

// note: I am sure there's a better way to define this rule using 
// FluentValidation syntax I have not explored ... yet
// this is just an initial pass ...

failed validation with 3 errors

Error Message: 0 : Customer must have a current Discount
Error Code: predicate_error

Error Message: 1 : Discount must be less than 100%
Error Code: lessthan_error

Error Message: 2 : Current Store must have a current promotional offer
Error Code: predicate_error

BillWoodruff wrote:

When I think I have an implementation of all this in optimal FluentValidation style, I'll post a link to a working sample as a Tip/Trick.

GuyThiebaut wrote:

In the past year there have been a large number of more experienced staff leaving

GuyThiebaut wrote:

the business leaders are definitely concerned about this

GuyThiebaut wrote:

however they have not acted on this concern yet

Quote:

I am grateful for having worked in an industry where I can earn enough to make this decision

Cornelius Henning wrote:

Spare a thought for the free society you have in the UK

Cornelius Henning wrote:

By the way: I am also a fan of Charlie Daniels, as you seem to be(?)