使用 fluentvalidation 和 asp.net mvc LessThanOrEqualTo 不触发不显眼的客户端验证 [英] unobtrusive client validation using fluentvalidation and asp.net mvc LessThanOrEqualTo not firing
问题描述
我有以下规则
第一个使用不显眼的客户端验证工作，第二个没有
the 1st does work using unobtrusive, client side validation, the second does not
有什么想法吗?
RuleFor(x => x.StartDate)
.LessThanOrEqualTo(x => x.EndDate.Value)
.WithLocalizedMessage(() => CommonRes.Less_Than_Or_Equal_To, filters => CommonRes.Start_Date, filters => CommonRes.End_Date);
RuleFor(x => x.StartDate)
.GreaterThanOrEqualTo(x => x.AbsoluteStartDate)
.LessThanOrEqualTo(x => x.AbsoluteEndDate)
.WithLocalizedMessage(() => CommonRes.Between, filters => CommonRes.Start_Date, filters => filters.AbsoluteStartDate, filters => filters.AbsoluteEndDate);
推荐答案
LessThanOrEqualTo 或 GreaterThanOrEqualTo 规则均不受客户端验证支持，如文档.
Neither of the LessThanOrEqualTo or GreaterThanOrEqualTo rules are supported by client side validation as explained in the documentation.
这意味着，如果您想为它们进行客户端验证，您将需要编写一个自定义的 FluentValidationPropertyValidator 并实现 GetClientValidationRules 方法，这将允许您注册一个自定义适配器并在 javascript 中为其实现客户端验证逻辑.
This means that if you want to have client side validation for them you will need to write a custom FluentValidationPropertyValidator and implement the GetClientValidationRules method which will allow you to register a custom adapter and implement the client side validation logic for it in javascript.
如果您对如何实现这一点感兴趣，请 ping 我，我将提供一个示例.
If you are interested on how this could be achieved just ping me and I will provide an example.
更新
根据要求，我将尝试展示一个示例，说明如何为 LessThanOrEqualTo 规则实现自定义客户端验证.这只是具有不可为空日期的特殊情况.为所有可能的情况编写这样的自定义客户端验证器当然是可能的，但需要付出更多的努力.
As request, I will try to show an example of how one could implement custom client side validation for the LessThanOrEqualTo rule. It is only a particular case with non-nullable dates. Writing such custom client side validator for all the possible case is of course possible but it will require significantly more efforts.
所以我们从一个视图模型和一个相应的验证器开始:
So we start with a view model and a corresponding validator:
[Validator(typeof(MyViewModelValidator))]
public class MyViewModel
{
[Display(Name = "Start date")]
[DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
public DateTime StartDate { get; set; }
public DateTime DateToCompareAgainst { get; set; }
}
public class MyViewModelValidator : AbstractValidator<MyViewModel>
{
public MyViewModelValidator()
{
RuleFor(x => x.StartDate)
.LessThanOrEqualTo(x => x.DateToCompareAgainst)
.WithMessage("Invalid start date");
}
}
然后是控制器:
public class HomeController : Controller
{
public ActionResult Index()
{
var model = new MyViewModel
{
StartDate = DateTime.Now.AddDays(2),
DateToCompareAgainst = DateTime.Now
};
return View(model);
}
[HttpPost]
public ActionResult Index(MyViewModel model)
{
return View(model);
}
}
和视图:
@model MyViewModel
@using (Html.BeginForm())
{
@Html.Hidden("DateToCompareAgainst", Model.DateToCompareAgainst.ToString("yyyy-MM-dd"))
@Html.LabelFor(x => x.StartDate)
@Html.EditorFor(x => x.StartDate)
@Html.ValidationMessageFor(x => x.StartDate)
<button type="submit">OK</button>
}
到目前为止，所有这些都是标准的东西.它可以工作，但无需客户端验证.
All this is standard stuff so far. It will work but without client validation.
第一步是编写FluentValidationPropertyValidator:
public class LessThanOrEqualToFluentValidationPropertyValidator : FluentValidationPropertyValidator
{
public LessThanOrEqualToFluentValidationPropertyValidator(ModelMetadata metadata, ControllerContext controllerContext, PropertyRule rule, IPropertyValidator validator)
: base(metadata, controllerContext, rule, validator)
{
}
public override IEnumerable<ModelClientValidationRule> GetClientValidationRules()
{
if (!this.ShouldGenerateClientSideRules())
{
yield break;
}
var validator = Validator as LessThanOrEqualValidator;
var errorMessage = new MessageFormatter()
.AppendPropertyName(this.Rule.GetDisplayName())
.BuildMessage(validator.ErrorMessageSource.GetString());
var rule = new ModelClientValidationRule
{
ErrorMessage = errorMessage,
ValidationType = "lessthanorequaldate"
};
rule.ValidationParameters["other"] = CompareAttribute.FormatPropertyForClientValidation(validator.MemberToCompare.Name);
yield return rule;
}
}
在配置我们的 FluentValidation 提供程序时将在 Application_Start 中注册:
which will be registered in Application_Start when configuring our FluentValidation provider:
FluentValidationModelValidatorProvider.Configure(x =>
{
x.Add(typeof(LessThanOrEqualValidator), (metadata, context, rule, validator) => new LessThanOrEqualToFluentValidationPropertyValidator(metadata, context, rule, validator));
});
最后一点是客户端上的自定义适配器.因此，我们当然将这 2 个脚本添加到我们的页面中，以启用不显眼的客户端验证:
And the last bit is the custom adapter on the client. So we add of course the 2 scripts to our page in order to enable unobtrusive client side validation:
<script src="@Url.Content("~/Scripts/jquery.validate.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.js")" type="text/javascript"></script>
和自定义适配器:
(function ($) {
$.validator.unobtrusive.adapters.add('lessthanorequaldate', ['other'], function (options) {
var getModelPrefix = function (fieldName) {
return fieldName.substr(0, fieldName.lastIndexOf(".") + 1);
};
var appendModelPrefix = function (value, prefix) {
if (value.indexOf("*.") === 0) {
value = value.replace("*.", prefix);
}
return value;
}
var prefix = getModelPrefix(options.element.name),
other = options.params.other,
fullOtherName = appendModelPrefix(other, prefix),
element = $(options.form).find(":input[name=" + fullOtherName + "]")[0];
options.rules['lessthanorequaldate'] = element;
if (options.message != null) {
options.messages['lessthanorequaldate'] = options.message;
}
});
$.validator.addMethod('lessthanorequaldate', function (value, element, params) {
var parseDate = function (date) {
var m = date.match(/^(d{4})-(d{1,2})-(d{1,2})$/);
return m ? new Date(parseInt(m[1]), parseInt(m[2]) - 1, parseInt(m[3])) : null;
};
var date = parseDate(value);
var dateToCompareAgainst = parseDate($(params).val());
if (isNaN(date.getTime()) || isNaN(dateToCompareAgainst.getTime())) {
return false;
}
return date <= dateToCompareAgainst;
});
})(jQuery);
这篇关于使用 fluentvalidation 和 asp.net mvc LessThanOrEqualTo 不触发不显眼的客户端验证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！
