[英]Using FluentValidation to validate mutually exclusive fields
I'm attempting to validate that only one of three fields has a value using FluentValidation. 我试图使用FluentValidation验证三个字段中只有一个具有值。
RuleFor(x => x.Date1)
.Must(x => !x.HasValue)
.When(x => x.Date2.HasValue || x.Date3.HasValue)
.WithMessage("Select only one of Date 1, Date 2 and Date 3");
This is repeated for the other 2 dates. 其他2个日期重复此操作。 As would be expected, this produces on message per rule that matches. 正如所料,这会产生匹配的每条规则的消息。
There are other rules involved, so is there a way to execute the other rules but fail on the first of these three? 还有其他规则,所以有没有办法执行其他规则,但在这三个中的第一个失败? I've seen where I could set CascadeMode.StopOnFirstFailure globally but I want the other rules outside of these three to work as they currently do. 我已经看到我可以在全球范围内设置CascadeMode.StopOnFirstFailure ,但我希望这三个规则之外的其他规则能够像现在一样工作。
I decide to go down another route. 我决定沿着另一条路走下去。 It feels elegant but I'll know if it passes the code review. 它感觉很优雅,但我知道它是否通过了代码审查。
I created a new property 我创建了一个新属性
public IEnumerable<DateTime?> MutuallyExclusiveDates
{
get
{
return new List<DateTime?>()
{
Date1,
Date2,
Date3
};
}
}
Then I added this rule 然后我添加了这个规则
RuleFor(x => x.MutuallyExclusiveDates)
.Must(x => x.Count(d => d.HasValue) <= 1)
.WithMessage("Select only one of Date 1, Date 2 and Date 3");
I would use something like 我会用类似的东西
RuleFor(x => x).Must(ValidateDates).WithName("something");
<snip/>
private bool ValidateDates(SomeRequest request)
{
//perform logic and return true/false;
}
Inside the ValidateDates
method you have access to the full request. 在ValidateDates
方法中,您可以访问完整请求。
For more examples of complex validation using Must
take a look at this post - http://nodogmablog.bryanhogan.net/2015/04/complex-model-validation-using-fluent-validation/ 对于复杂的验证的更多示例使用Must
看看这篇文章- http://nodogmablog.bryanhogan.net/2015/04/complex-model-validation-using-fluent-validation/
Simple one rule for all 3 using xor. 使用xor的所有3个简单的一条规则。 No extra properties needed. 无需额外的属性。 take out the unless if you want to force at least one to have a value. 除非你想强迫至少一个人拥有一个价值,否则取出。
RuleFor(x => x).Cascade(CascadeMode.StopOnFirstFailure)
.Must(x => (x.date1.HasValue ^ x.date2.HasValue) ^ x.date3.HasValue)
.Unless(x => !x.date1.HasValue && !x.date2.HasValue && !x.date3.HasValue)
.WithMessage("Select only one of Date 1, Date 2 and Date 3");
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