C# .Net Fluent验证集执行顺序

我需要设置验证的执行顺序，以便在第一次失败后停止验证

但是，我想知道还有什么其他方法可以做到这一点

通常我会有这样的东西：

public Constructor(){

    // Simple validation
    RuleFor(x => x.Id).NotNull().NotEmpty();

    // advanced validation
    // item must exist in database
    RuleFor(x => x.Id).Must(ExistsInDatabase);

    // item must exist in database previously
    // item must be some of the allowed names -- fetched from db
    RuleFor(x => x.Id).Must(BeAReferenceInSomeTable);

    private bool ExistsInDatabase(){}

    private bool BeAReferenceInSomeTable(){}

}

public Constructor(){

    CascadeMode = FluentValidation.CascadeMode.StopOnFirstFailure;

    // simple validation stays the same
    ...

    // advanced validation
    RuleFor(x => x.Id)
        .Must(ExistsInDatabase)
        .Must(BeAReferenceInSomeTable)
        .When(x => !string.IsNullOrEmpty(x.Id) &&
                    !string.IsNullOrEmpty(x.Name)
        );  
}

public Constructor(){

    // Simple validation
    RuleFor(x => x.Id).Cascade(CascadeMode.StopOnFirstFailure).NotNull().WithMessage("Must not be null");

    RuleFor(x => x.Id).NotEmpty().WithMessage("Must not be empty");


    // advanced validation
    // item must exist in database
    RuleFor(x => x.Id).Must(ExistsInDatabase).WithMessage("Must exist in database");

    // item must exist in database previously
    // item must be some of the allowed names -- fetched from db
    RuleFor(x => x.Id).Must(BeAReferenceInSomeTable).WithMessage("Must not be referenced");

    private bool ExistsInDatabase(){}

    private bool BeAReferenceInSomeTable(){}

但使用此BearReferenceInSometable可以在现有数据库之前执行。 所以，当表中不存在Id时，BearReferenceInSometable验证将引发异常，而不是因为ExistsInDatabase验证而导致验证失败

首先想到的解决方法是：

public Constructor(){

    // Simple validation
    RuleFor(x => x.Id).NotNull().NotEmpty();

    // advanced validation
    // item must exist in database
    RuleFor(x => x.Id).Must(ExistsInDatabase);

    // item must exist in database previously
    // item must be some of the allowed names -- fetched from db
    RuleFor(x => x.Id).Must(BeAReferenceInSomeTable);

    private bool ExistsInDatabase(){}

    private bool BeAReferenceInSomeTable(){}

}

public Constructor(){

    CascadeMode = FluentValidation.CascadeMode.StopOnFirstFailure;

    // simple validation stays the same
    ...

    // advanced validation
    RuleFor(x => x.Id)
        .Must(ExistsInDatabase)
        .Must(BeAReferenceInSomeTable)
        .When(x => !string.IsNullOrEmpty(x.Id) &&
                    !string.IsNullOrEmpty(x.Name)
        );  
}

public Constructor(){

    // Simple validation
    RuleFor(x => x.Id).Cascade(CascadeMode.StopOnFirstFailure).NotNull().WithMessage("Must not be null");

    RuleFor(x => x.Id).NotEmpty().WithMessage("Must not be empty");


    // advanced validation
    // item must exist in database
    RuleFor(x => x.Id).Must(ExistsInDatabase).WithMessage("Must exist in database");

    // item must exist in database previously
    // item must be some of the allowed names -- fetched from db
    RuleFor(x => x.Id).Must(BeAReferenceInSomeTable).WithMessage("Must not be referenced");

    private bool ExistsInDatabase(){}

    private bool BeAReferenceInSomeTable(){}

---

但在这种情况下，如何设置propper消息进行验证，因为消息必须在执行之前给出。

请尝试以下操作：

public Constructor(){

    // Simple validation
    RuleFor(x => x.Id).NotNull().NotEmpty();

    // advanced validation
    // item must exist in database
    RuleFor(x => x.Id).Must(ExistsInDatabase);

    // item must exist in database previously
    // item must be some of the allowed names -- fetched from db
    RuleFor(x => x.Id).Must(BeAReferenceInSomeTable);

    private bool ExistsInDatabase(){}

    private bool BeAReferenceInSomeTable(){}

}

public Constructor(){

    CascadeMode = FluentValidation.CascadeMode.StopOnFirstFailure;

    // simple validation stays the same
    ...

    // advanced validation
    RuleFor(x => x.Id)
        .Must(ExistsInDatabase)
        .Must(BeAReferenceInSomeTable)
        .When(x => !string.IsNullOrEmpty(x.Id) &&
                    !string.IsNullOrEmpty(x.Name)
        );  
}

public Constructor(){

    // Simple validation
    RuleFor(x => x.Id).Cascade(CascadeMode.StopOnFirstFailure).NotNull().WithMessage("Must not be null");

    RuleFor(x => x.Id).NotEmpty().WithMessage("Must not be empty");


    // advanced validation
    // item must exist in database
    RuleFor(x => x.Id).Must(ExistsInDatabase).WithMessage("Must exist in database");

    // item must exist in database previously
    // item must be some of the allowed names -- fetched from db
    RuleFor(x => x.Id).Must(BeAReferenceInSomeTable).WithMessage("Must not be referenced");

    private bool ExistsInDatabase(){}

    private bool BeAReferenceInSomeTable(){}

}

并为执行命令链接：

RuleFor(x => x.Id).Cascade(CascadeMode.StopOnFirstFailure)
    .NotNull().WithMessage("Must not be null")
    .NotEmpty().WithMessage("Must not be empty")
    .Must(ExistsInDatabase).WithMessage("Must exist in database")
    .Must(BeAReferenceInSomeTable).WithMessage("Must not be referenced");

---

试着这样做：

public Constructor(){

    // Simple validation
    RuleFor(x => x.Id).NotNull().NotEmpty();

    // advanced validation
    // item must exist in database
    RuleFor(x => x.Id).Must(ExistsInDatabase);

    // item must exist in database previously
    // item must be some of the allowed names -- fetched from db
    RuleFor(x => x.Id).Must(BeAReferenceInSomeTable);

    private bool ExistsInDatabase(){}

    private bool BeAReferenceInSomeTable(){}

}

public Constructor(){

    CascadeMode = FluentValidation.CascadeMode.StopOnFirstFailure;

    // simple validation stays the same
    ...

    // advanced validation
    RuleFor(x => x.Id)
        .Must(ExistsInDatabase)
        .Must(BeAReferenceInSomeTable)
        .When(x => !string.IsNullOrEmpty(x.Id) &&
                    !string.IsNullOrEmpty(x.Name)
        );  
}

public Constructor(){

    // Simple validation
    RuleFor(x => x.Id).Cascade(CascadeMode.StopOnFirstFailure).NotNull().WithMessage("Must not be null");

    RuleFor(x => x.Id).NotEmpty().WithMessage("Must not be empty");


    // advanced validation
    // item must exist in database
    RuleFor(x => x.Id).Must(ExistsInDatabase).WithMessage("Must exist in database");

    // item must exist in database previously
    // item must be some of the allowed names -- fetched from db
    RuleFor(x => x.Id).Must(BeAReferenceInSomeTable).WithMessage("Must not be referenced");

    private bool ExistsInDatabase(){}

    private bool BeAReferenceInSomeTable(){}

}

并为执行命令链接：

RuleFor(x => x.Id).Cascade(CascadeMode.StopOnFirstFailure)
    .NotNull().WithMessage("Must not be null")
    .NotEmpty().WithMessage("Must not be empty")
    .Must(ExistsInDatabase).WithMessage("Must exist in database")
    .Must(BeAReferenceInSomeTable).WithMessage("Must not be referenced");

---

您可以使用

.WithMessage（“您的消息”）

为验证失败添加适当的消息，这也适用于链接（这是您在第二个示例中所做的）。是的，但ExistsInDatabase应返回：“Id does note exist in database”，BearReference应返回：“Id未在某些表中引用”。使用WithMessage，只能传递静态预定义字符串。但这并不好，因为我只希望返回一条消息。您可以使用

。WithMessage（“您的消息”）

为验证失败添加适当的消息，这也适用于链接（这是您在第二个示例中所做的）。是的，但ExistsInDatabase应返回：“Id does note exist in database”，BearReference应返回：“Id未在某些表中引用”。使用WithMessage，只能传递静态预定义字符串。但这并不好，因为当您在第一行设置级联模式时，我只希望返回一条消息，它仅用于该链。因此，在没有多个条件的情况下使用它是没有效果的。代码的其余部分将我带到打开主题的同一个问题。您添加的WithMessage将呈现正确的验证错误，但验证可能不会按顺序执行。然后使用链接来实现执行顺序。我扩展了您的示例，确实得到了我需要的，但这会导致冗余操作。你认为有更好的办法吗？我会将您的解决方案标记为正确的解决方案，因为它接近（但不完全）我所需要的。RuleFor（x=>x.Id）.Must（ExistsInDatabase）.WithMessage（“必须存在于数据库中”）.When（x=>x.Id.NotNullOrEmpty（））RuleFor（x=>x.Id）.Must（BeAReferenceInSomeTable）.WithMessage（“不得被引用”）.When（x=>x.NotNullOrEmpty（）&&ExistsInDatabase（x））；正在执行哪些“冗余操作”？对于验证BearReferenceInSometable ExistsInDatabase，在验证之前执行。对于验证ExistsInDatabase，再次执行相同的方法。这不是这个小测试的问题，但它可以在更大的测试中扩展。当您在第一行中设置级联模式时，它仅用于该链。因此，在没有多个条件的情况下使用它是没有效果的。代码的其余部分将我带到打开主题的同一个问题。您添加的WithMessage将呈现正确的验证错误，但验证可能不会按顺序执行。然后使用链接来实现执行顺序。我扩展了您的示例，确实得到了我需要的，但这会导致冗余操作。你认为有更好的办法吗？我会将您的解决方案标记为正确的解决方案，因为它接近（但不完全）我所需要的。RuleFor（x=>x.Id）.Must（ExistsInDatabase）.WithMessage（“必须存在于数据库中”）.When（x=>x.Id.NotNullOrEmpty（））RuleFor（x=>x.Id）.Must（BeAReferenceInSomeTable）.WithMessage（“不得被引用”）.When（x=>x.NotNullOrEmpty（）&&ExistsInDatabase（x））；正在执行哪些“冗余操作”？对于验证BearReferenceInSometable ExistsInDatabase，在验证之前执行。对于验证ExistsInDatabase，再次执行相同的方法。这不是这个小测试的问题，但它可以在更大的测试中扩展。