列表中可选对象的 FluentValidation

Question

对于列表中可能不存在的对象，有没有办法使用对象属性的值来使用 FluentValidation？我认为这是可能的，但我不知道如何编码。使用下面的代码示例，如果操作记录的操作值为 "Approve"，是否可以确保电子邮件字段不为空？为了便于争论，假设我们不希望此规则应用于列表中可能在 Action 字段中具有不同值的其他对象。

class Action_Record
{
    public string Type { get; set; }
    public string Action { get; set; }
    public string Comments { get; set; }
    public string Action_By_Email { get; set; }
    public DateTime? Action_Start { get; set; }
    public DateTime? Action_End { get; set; }
    public Action_Record()
    {
        this.Type = "";
        this.Action = "";
        this.Comments = "";
        this.Action_By_Email = "";
        this.Action_Start = null;
        this.Action_End = null;
    }
}

Approver_Recs = new List<Action_Record>();
Action_Record o = new Action_Record();
o.Type = "Finance";
o.Action = "Approve";

Approver_Recs.Add(o);

Answer 1

使用最新版本的 "FluentValidation"，这应该可以工作：

创建一个将集合对象作为输入的验证器class。然后仅针对 Action="Approve" 的情况我们调用 EmailValidator.

public class ActionRecordValidator : AbstractValidator<List<Action_Record>>
{
    public ActionRecordValidator()
    {
        RuleForEach(x => x).Where(x => x.Action == "Approve").SetValidator(new EmailValidator());
    }
}

public class EmailValidator : AbstractValidator<Action_Record>
{
    public EmailValidator()
    {
       RuleFor(x => x.Action_By_Email).NotNull().NotEmpty().WithMessage("Email is required when Approve action is chosen.");
    }
}

调用代码示例：

        var Approver_Recs = new List<Action_Record>();
        Action_Record o = new Action_Record() { Type = "Finance" , Action = "Reject" };
        Approver_Recs.Add(o);
        Action_Record o2 = new Action_Record() { Type = "Finance" , Action = "Approve" };

        ActionRecordValidator validator = new ActionRecordValidator();
        Approver_Recs.Add(o2);
        ValidationResult results = validator.Validate(Approver_Recs);
        if (!results.IsValid)
        {
            foreach (var failure in results.Errors)
            {
                Console.WriteLine("Property " + failure.PropertyName + " failed validation. Error was: " + failure.ErrorMessage);
            }
        }

列表中可选对象的 FluentValidation

FluentValidation of optional object in list

c#

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fluentvalidation