Csharp 匿名类型的AbstractValidator

发布于12月14日

internal sealed class MeetingValidator : AbstractValidator<Meeting> 
{
    public MeetingValidator()
    {
      RuleFor(m => new { m.Start, m.End })
        .Must(d => d.End - d.Start > 0)

      // Other Rules
    }
}

有没有办法在匿名类型上声明AbstractValidator？

这是为了重构目的.

该测试对除会议之外的其他类型是常见的，我希望最大限度地减少代码的重复.

internal sealed class EndDateValidator : AbstractValidator<????> 
{
    public EndDateValidator ()
    {
      RuleFor(m => ????)
        .Must(d => d.End - d.Start > 0)
    }
}


public static IRuleBuilderOptions<T, ????> MustHaveAEndStartDate<T>(this IRuleBuilder<T,  ????> ruleBuilder)
{
    return ruleBuilder.SetValidator(new EndDateValidator());
}


internal sealed class MeetingValidator : AbstractValidator<Meeting> 
{
    public MeetingValidator()
    {
      RuleFor(m => new { m.Start, m.End }) // or something else
        .MustHaveValidEndDate()
    }
}

推荐答案

如果您不能重构源类(这里:Meeting)，那么您可以使用(DateTime Start, DateTime End) ValueTuple而不是匿名类型，将验证器定义为继承自AbstractValidator<(DateTime Start, DateTime End)>.

internal sealed class MeetingValidator : AbstractValidator<Meeting>
{
    public MeetingValidator()
    {
        RuleFor<(DateTime, DateTime)>(o => new(o.Start, o.End))
            .MustHaveValidEndDate();
    }
}

internal sealed class EndDateValidator : AbstractValidator<(DateTime Start, DateTime End)>
{
    public EndDateValidator()
    {
        RuleFor(o => o).Must(o => o.End > o.Start);
    }
}

public static class Extensions
{
    public static IRuleBuilderOptions<T, (DateTime Start, DateTime End)> MustHaveValidEndDate<T>(
        this IRuleBuilder<T, (DateTime Start, DateTime End)> ruleBuilder
        )
    {
        return ruleBuilder.SetValidator(new EndDateValidator());
    }
}