何时&的FluentValidation必须? [英] FluentValidation for When & must?

问题描述

当dropdownlist值为yes并且该字段必须为日期时，我正在尝试使用FluentValidation验证.当dropdownlist为yes并检查date时，它可以工作.但 当我选择No时也显示验证，但仍然显示Must be date.

I am trying use FluentValidation validaton when dropdownlist value is yes and the field must be date. it is working when dropdownlist is yes checking for date. But also showing validation when I select No still it says Must be date.

如果下拉列表值不是yes，则不应再进行验证.我们该怎么做?

It should not validate anymore if dropdownlist value otherthan the yes. How can we do that?

 RuleFor(x => x.DtPublishedTimeText)
            .NotEmpty()
            .When(HasMaterialPublishedElseWhereText)
            .WithMessage("Required Field")
            .Must(BeAValidDate)
            .WithMessage("Must be date");

private bool BeAValidDate(string val)
{
    DateTime date;
    return  DateTime.TryParse(val, out date);
}

private bool HasMaterialPublishedElseWhereText(MeetingAbstract model)
{
    return model.HasMaterialPublishedElseWhereText != null && 
             model.HasMaterialPublishedElseWhereText.Equals("yes");
}

推荐答案

您遇到的问题是When谓词仅适用于一条规则.您需要同时在NotEmpty和Must上进行条件验证.

The issue you are having is the When predicate only applies to one rule. You need to have conditional validation on both the NotEmpty AND the Must.

有两种方法可以实现此目的.当只有几个条件规则时，选项1会比较整齐，否则我会使用选项2.

There two ways to achieve this. Option 1 is tidier when there are only a couple of conditional rules, otherwise I'd use option 2.

RuleFor(x => x.DtPublishedTimeText)
    .NotEmpty()
        .When(HasMaterialPublishedElseWhereText)
        .WithMessage("Required Field")
    .Must(BeAValidDate)
        .When(HasMaterialPublishedElseWhereText)
        .WithMessage("Must be date");

或

When(HasMaterialPublishedElseWhereText, () => {
    RuleFor(x => x.DtPublishedTimeText)
        .NotEmpty()
            .WithMessage("Required Field");
    RuleFor(x => x.DtPublishedTimeText)
        .Must(BeAValidDate)
            .WithMessage("Must be date");
});

请注意:我不知道HasMaterialPublishedElseWhereText是什么还是它的外观.我假设您可以将其用作谓词

Do note: I have no idea what HasMaterialPublishedElseWhereText is or what it looks like. I am assuming you can use it as a predicate

我还将考虑重构HasMaterialPublishedElseWhereText方法，以下内容不太容易出错.

I'd also look at refactoring the HasMaterialPublishedElseWhereText method, the following is less error prone.

private bool HasMaterialPublishedElseWhereText(MeetingAbstract model)
{
    return String.Equals(model.HasMaterialPublishedElseWhereText, "yes", StringComparison.InvariantCultureIgnoreCase);
}

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