FluentValidation：检查两个字段之一是否为空 [英] FluentValidation: Check if one of two fields are empty

问题描述

我有这个模型

 公共类人
 {
 public int ID {get;组; } 
公用字串FirstName {get;组; } 
公用字串LastName {get;组; } 
} 
  

我要创建一个必须填写名字或姓氏的验证按用户。
我安装了 FluentValidation 并创建了一个 customvalidator类

 公共类PersonValidator：AbstractValidator< Person> 
 {
 public PersonValidator（）
 {
 RuleFor（（person => person.FirstName）//不知道如何检查一个空的
 } 
} 
  

要只检查一个字段，我可以做 RuleFor（person => person.FirstName）.NotNull（）;

但是如何检查其中一个是否为空。 / p>

此外，是否可以通过 fluentValidation 创建验证后，在客户端使用它来显示错误？

Edit1

 受保护的无效Application_Start （）
 {
 AreaRegistration.RegisterAllAreas（）; 
 
 FilterConfig.RegisterGlobalFilters（GlobalFilters.Filters）; 
 RouteConfig.RegisterRoutes（RouteTable.Routes）; 
 BundleConfig.RegisterBundles（BundleTable.Bundles）; 
 FluentValidationModelValidatorProvider.Configure（）; 
} 
 //创建验证
命名空间WebApplic ation1.Models.CustomValidator 
 {
公共类PersonValidator：AbstractValidator< Person> 
 {
 public PersonValidator（）
 {
 RuleFor（m => m.FirstName）.NotEmpty（）。When（m => string.IsNullOrEmpty（m.LastName） ））。WithMessage（ *必须是名或姓）; 
 RuleFor（m => m.LastName）.NotEmpty（）。When（m => string.IsNullOrEmpty（m.FirstName））。WithMessage（ *名字或姓氏为必填项）； 
} 
} 
 
} 
 //模型类
 [Validator（typeof（PersonValidator））] 
公共类Person 
 {
 public Person（）
 {
 InterestList = new List< string>（）; 
} 
 public int Id {get;组; } 
 public int ContactId {get;组; } 
 [RequiredIfEmpty（ LastName）] 
公共字符串FirstName {get;组; } 
 [RequiredIfEmpty（ FirstName）] 
公共字符串LastName {get;组; } 
公用字串EmailAddress {get;组; } 
公用字符串Phone {get;组; } 
公共字符串Country {get;组; } 
公共列表< string> InterestList {get;组; } 
} 
 //查看
 @model WebApplication1.Models.Person 
 
< script src = @ Url.Content（〜/ Scripts / jquery- 1.8.2.min.js）>< / script> 
< script src = @ Url.Content（〜/ Scripts / jquery.validate.min.js）>< / script> 
< script src = @ Url.Content（〜/ Scripts / jquery.validate.unobtrusive.min.js）>< / script> 
< script src = @ Url.Content（〜/ Scripts / jquery.unobtrusive-ajax.min.js） type = text / javascript>< / script> 
 
 @ Html.ValidationSummary（true）
 @using（Html.BeginForm（ AddPerson， Person，FormMethod.Post））
 {
< div class = label>名字< / div> 
< div class = input-block-level> @ Html.TextBoxFor（m => m.FirstName）@ Html.ValidationMessageFor（m => m.FirstName）< / div> 
< br /> 
< div class = label>姓氏< / div> 
< div class = input-block-level> @ Html.TextBoxFor（m => m.LastName）@ Html.ValidationMessageFor（m => m.LastName）< / div> 
< button type = submit class = btn-primary> Submit< / button> 
} 
  

解决方案

您可以使用何时/除非条件：

  RuleFor（m => m.FirstName）.NotEmpty（）。When（m => string.IsNullOrEmpty（m.LastName））; 
 RuleFor（m => m.LastName）.NotEmpty（）。When（m => string.IsNullOrEmpty（m.FirstName））; 
  

或

  RuleFor（m => m.FirstName）.NotEmpty（）。Unless（m =>！string.IsNullOrEmpty（m.LastName））; 
 RuleFor（m => m.LastName）.NotEmpty（）。Unless（m =>！string.IsNullOrEmpty（m.FirstName））; 
  

对于第二个问题， FluentValidation 可以工作使用客户端验证，但不支持所有规则。 此处，您可以找到客户端支持的验证器：

1. NotNull / NotEmpty


2. 匹配项（正则表达式）


3. InclusiveBetween（范围）


4. 信用卡


5. 电子邮件


6. EqualTo（跨属性平等比较）
   
7. 长度

对于不在列表中的规则，您必须编写自己的 FluentValidationPropertyValidator 并实现 GetClientValidationRules 。通过执行简单搜索，您可以在 StackOverflow 上找到一些示例。

I have this model

public class Person
{
    public int Id { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }  
}

I want to create a validation where either FirstName or LastName must be filled in by user. I installed FluentValidation and created a customvalidator class

public class PersonValidator:AbstractValidator<Person>
{
    public PersonValidator()
    {
        RuleFor((person=>person.FirstName)//don't know how to check if one is empty
    }
}

To check just one field I could just do RuleFor(person => person.FirstName).NotNull();

But how do I check if one of them is null.

Also, is it possible, once validation is created via fluentValidation, use it on the client side to show error?

Edit1

    protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();

        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        BundleConfig.RegisterBundles(BundleTable.Bundles);
        FluentValidationModelValidatorProvider.Configure();
    }
//creating validation
namespace WebApplication1.Models.CustomValidator
{
    public class PersonValidator:AbstractValidator<Person>
    {
        public PersonValidator()
        {
            RuleFor(m => m.FirstName).NotEmpty().When(m => string.IsNullOrEmpty(m.LastName)).WithMessage("*Either First Name or Last Name is required");
            RuleFor(m => m.LastName).NotEmpty().When(m => string.IsNullOrEmpty(m.FirstName)).WithMessage("*Either First Name or Last Name is required");
        }
    }

}
//model class
[Validator(typeof(PersonValidator))]
public class Person
{
    public Person()
    {
        InterestList = new List<string>();
    }
    public int Id { get; set; }
    public int ContactId { get; set; }
    [RequiredIfEmpty("LastName")]
    public string FirstName { get; set; }
    [RequiredIfEmpty("FirstName")]
    public string LastName { get; set; }
    public string EmailAddress { get; set; }
    public string Phone { get; set; }
    public string Country { get; set; }
    public List<string> InterestList { get; set; } 
}
//view
@model WebApplication1.Models.Person

<script src="@Url.Content("~/Scripts/jquery-1.8.2.min.js")"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.min.js")"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")"></script>
<script src="@Url.Content("~/Scripts/jquery.unobtrusive-ajax.min.js")" type="text/javascript"></script>

@Html.ValidationSummary(true)
@using(Html.BeginForm("AddPerson","Person",FormMethod.Post))
{
    <div class="label">First Name</div>
    <div class="input-block-level">@Html.TextBoxFor(m=>m.FirstName)@Html.ValidationMessageFor(m=>m.FirstName)</div>
    <br/>
    <div class="label">Last Name</div>
    <div class="input-block-level">@Html.TextBoxFor(m=>m.LastName)@Html.ValidationMessageFor(m=>m.LastName)</div>
    <button type="submit" class="btn-primary">Submit</button>
}

解决方案

You can use When/Unless condition:

RuleFor(m => m.FirstName).NotEmpty().When(m => string.IsNullOrEmpty(m.LastName));
RuleFor(m => m.LastName).NotEmpty().When(m => string.IsNullOrEmpty(m.FirstName));

or

RuleFor(m => m.FirstName).NotEmpty().Unless(m => !string.IsNullOrEmpty(m.LastName));
RuleFor(m => m.LastName).NotEmpty().Unless(m => !string.IsNullOrEmpty(m.FirstName));

As for your second question, FluentValidation works with client-side validation, but not all rules are supported. Here you can find validators, that are supported on the client-side:

1. NotNull/NotEmpty
2. Matches (regex)
3. InclusiveBetween (range)
4. CreditCard
5. Email
6. EqualTo (cross-property equality comparison)
7. Length

For rules that are not in the list you have to write your own FluentValidationPropertyValidator and implement GetClientValidationRules. You can find a few samples of this on the StackOverflow by doing simple search.

这篇关于FluentValidation：检查两个字段之一是否为空的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！