多条件条件验证

Question

我熟悉使用条件验证、Unless和Otherwise在FluentValidation中使用简单的When。这对于在单个条件下验证很好。

我想验证的基础上的一个if-否则-否则的语句，但我不能确定如何这样做。

我想要实现

if (product == Product.A)
{
    // Validation for Product A
}
else if (product == Product.B)
{
    // Validation for Product B
}
else
{
    // Fail validation for other products
}

如果我只想检查单个产品，例如产品A，那么我现在拥有的产品就能工作。

When(
    order => order.Product == Product.A,
    () =>
    {
    RuleFor(order => order.State)
        .Must(
            state => state == State.HI
            || state == State.AK)
        .WithMessage("Product A only valid in Hawaii and Alaska.");
    }).Otherwise(
    () =>
    {
        RuleFor(order => order.Product)
            .Equal(Product.A)
            .WithMessage("Order only available with Product A.");
    });

我想要的是将产品A和B的多个When方法组合在一起，否则就会出现"Order只能与产品A或B一起使用“的消息。

Answer 1

我已经解决了类似的问题，打破规则，并设置警卫他们。

遵循您的if- psuedo psuedo代码：

RuleFor(order => order.State)
    .Must(state => state == State.HI || state == State.AK)
    .WithMessage("Product A only valid in Hawaii and Alaska."))
    .When(order => order.Product == Product.A);

RuleFor(order => order.State)
    .Must(state => state == State.DC || state == State.CA)
    .WithMessage("Product B only valid in Washington and California."))
    .When(order => order.Product == Product.B);

// the not Product.A or Product.B case (I'm not sure what you want here) - but this 
// demonstrates a kind of "meta" rule to be applied to the whole order
RuleFor(order => order)
    .Must(order => order.Product == Product.A || order.Product == Product.B)
    .WithName("Order")
    .WithMessage(order => $"Order must be either {Product.A} or {Product.B}");