C#流利验证答案

【问题标题】：C# Fluent-validationsC#流利验证
【发布时间】：2020-05-21 19:48:00
【问题描述】：

我有以下流畅的验证，正在部分工作。如果我输入 3 个请求的值是有效的，但如果我输入 2 个值也是有效的。它应该不起作用，因为所有 3 个值都是强制性的。

 RuleFor(x => x.Entities).Must(list => list.Count == 3)
            .WithMessage("The Entities list must contain 3 items and for AmendmentParties the RelationType must be CurrentName, ChangeAddName and AuthorizingPartyName ");
        RuleForEach(x => x.Entities).ChildRules(x =>
        {
            x.RuleFor(x => x.RelationType).Equals(EntityAmendmentRelation.CurrentName)
            .Equals(EntityAmendmentRelation.ChangeAddName)
            .Equals(EntityAmendmentRelation.AuthorizingPartyName);
        });

请求如下：目标是实体列表必须包含 3 个项目，并且在每个项目中，RelationType 属性需要不同。

 "entities": [
        {
            "ObjectType": "SecuredParty",
            "reqSearchID": "NoSearch",
            "RelationType": "CurrentName",
            "altCapacity": "NoAltCapacity",
            "OrganizationName": "Secured Party",
            "Address": {
                "StreetAddress": "12345 Main Street",
                "City": "Sacramento",
                "State": "CA",
                "PostalCode": "95811",
                "Country": "USA"
            }
        },
        {
            "ObjectType": "SecuredParty",
            "reqSearchID": "NoSearch",
            "RelationType": "ChangeAddName",
            "altCapacity": "NoAltCapacity",
            "OrganizationName": "Secured Party",
            "Address": {
                "StreetAddress": "12345 Main Street",
                "City": "Sacramento",
                "State": "CA",
                "PostalCode": "95811",
                "Country": "USA"
            }
        },
        {
            "ObjectType": "SecuredParty",
            "reqSearchID": "NoSearch",
            "RelationType": "AuthorizingPartyName",
            "altCapacity": "NoAltCapacity",
            "OrganizationName": "Secured Party",
            "Address": {
                "StreetAddress": "12345 Main Street",
                "City": "Sacramento",
                "State": "CA",
                "PostalCode": "95811",
                "Country": "USA"
            }
    }

【问题讨论】：

写一个函数来检查项目并在 Must 子句上调用它
工作是什么意思？它不会抛出异常，而是返回结果。如果您需要它来引发异常，请使用 validator.ValidateAndThrow

标签： c# fluentvalidation

【解决方案1】：

这取决于您希望验证器做什么。

如果你写，默认情况下

var results = validator.Validate(new TestData
{
    Entities = new List<string> { "", "" }
});

它不会抛出异常，而是返回结果，您可以稍后检查。

bool success = results.IsValid;

如果您需要它来引发异常，请按以下方式使用它：

validator.ValidateAndThrow(new TestData
{
    Entities = new List<string> { "", "" }
});

所以，对我来说，这两种方法的验证都适用于以下配置

public class TestDataValidator : AbstractValidator<TestData>
{
    public TestDataValidator()
    {
        RuleFor(x => x.Entities).Must(list => list.Count == 3)
        .WithMessage("The Entities list must contain 3 items and for AmendmentParties the RelationType must be CurrentName, ChangeAddName and AuthorizingPartyName ");
    }

}

使用第一种方法result.IsValid 是错误的；使用ValidateAndThrow 会抛出异常。

【讨论】：