使用父模型值进行子模型validation。 流利的validation。 MVC4
以下是我的问题的简化版本。
我不能压扁模型。 我需要一个“孩子”列表来validation生日。
我似乎无法在Parent类中引用日期，并想知道如何在Fluentvalidation中完成此操作？
模型
[Validator(typeof(ParentValidator))] public class Parent { public string Name { get; set; } public DateTime Birthdate { get; set; } public List Children { get; set; } } public class Child { public string ChildProperty{ get; set; } public DateTime Birthdate { get; set; } } validation器
public class ParentValidator : AbstractValidator { public ParentValidator() { RuleFor(model => model.Name).NotEmpty(); RuleForEach(model => model.Children).SetValidator(new ChildValidator()); } } public class ChildValidator : AbstractValidator { public ChildValidator() { RuleFor(model => model.ChildProperty).NotEmpty(); //Compare birthday to make sure date is < Parents birthday } }
像这样创建一个自定义属性validation器
public class AllChildBirtdaysMustBeLaterThanParent : PropertyValidator { public AllChildBirtdaysMustBeLaterThanParent() : base("Property {PropertyName} contains children born before their parent!") { } protected override bool IsValid(PropertyValidatorContext context) { var parent = context.ParentContext.InstanceToValidate as Parent; var list = context.PropertyValue as IList; if (list != null) { return ! (list.Any(c => parent.BirthDay > c.BirthDay)); } return true; } }
添加这样的规则
public class ParentValidator : AbstractValidator { public ParentValidator() { RuleFor(model => model.Name).NotEmpty(); RuleFor(model => model.Children) .SetValidator(new AllChildBirtdaysMustBeLaterThanParent()); // Collection validator RuleFor(model => model.Children).SetCollectionValidator(new ChildValidator()); } }
Custom Propertyvalidation器的替代方法是使用Custom方法：
public ParentValidator() { RuleFor(model => model.Name).NotEmpty(); RuleFor(model => model.Children).SetCollectionValidator(new ChildValidator()); Custom(parent => { if (parent.Children == null) return null; return parent.Children.Any(c => parent.BirthDay > c.BirthDay) ? new ValidationFailure("Children", "Child cannot be older than parent.") : null; }); }
显示失败的指标的粗略方式:(应该是其他标识符的名称）
public class ParentValidator : AbstractValidator { public ParentValidator() { RuleFor(m => m.Children).SetCollectionValidator(new ChildValidator()); Custom(parent => { if (parent.Children == null) return null; var failIdx = parent.Children.Where(c => parent.BirthDay > c.BirthDay).Select(c => parent.Children.IndexOf(c)); var failList = string.Join(",", failIdx); return failIdx.Count() > 0 ? new ValidationFailure("Children", "Child cannot be older than parent. Fail on indicies " + failList) : null; }); } }
使用set child validator有一种更简单的方法：
public class ChildValidator : AbstractValidator { public ChildValidator(Parent parent) { RuleFor(model => model.ChildProperty).NotEmpty(); RuleFor(model => model.Birthday).Must(birthday => parent.Birthday > birthday); } } public class ParentValidator : AbstractValidator { public ParentValidator() { RuleFor(model => model.Name).NotEmpty(); } public override ValidationResult Validate(Parent parent) { RuleFor(model => model.Children).SetCollectionValidator(new ChildValidator(this)); return base.Validate(); } }
现在，通过使用SetCollectionValidator扩展方法并将父对象传递给子validation器，可以进一步简化@ johnny-5的答案 ：
上述就是C#学习教程：使用父模型值进行子模型validation。 流利的validation。 MVC4分享的全部内容，如果对大家有所用处且需要了解更多关于C#学习教程，希望大家多多关注—计算机技术网(www.ctvol.com)!
public class ParentValidator : AbstractValidator { public ParentValidator() { RuleFor(model => model.Name).NotEmpty(); RuleFor(model => model.Children) .SetCollectionValidator(model => new ChildValidator(model)) } } public class ChildValidator : AbstractValidator { public ChildValidator(Parent parent) { RuleFor(model => model.ChildProperty).NotEmpty(); RuleFor(model => model.Birthday).Must(birthday => parent.Birthday < birthday); } }
本文来自网络收集，不代表计算机技术网立场，如涉及侵权请联系管理员删除。
ctvol管理联系方式QQ:251552304
本文章地址：https://www.ctvol.com/cdevelopment/1008637.html