Question

我有一个数据类层次结构

public class Base
{
    // Fields to be validated
}

public class Derived1 : Base
{
    // More fields to be validated
}

public class Derived2 : Base
{
    // More fields to be validated
}

使用FluentValidation框架验证Derived1和Derived2的适当方法是什么，而不重复Base类字段的规则？

Answer 1

public class Derived2Validator : AbstractValidator<Derived2>
{
    public Derived2Validator()
    {
        Include(new BaseValidator());
        Include(new Derived2Validator());
        RuleFor(d => d.Derived1Name).NotNull();
    }
}

Derived2Validator不需要继承BaseValidator或Derived1Validator。 Include方法将包含基本验证器的规则。

Answer 2

采取的一种方法如下：

public class Base
{
    public string BaseName { get; set; } 
}

public class Derived1 : Base
{
    public string Derived1Name { get; set; }
}

public class BaseValidator<T> : AbstractValidator<T> where T : Base
{
    public BaseValidator()
    {
        RuleFor(b => b.BaseName).NotNull();
    }
}

public class Derived1Validator : BaseValidator<Derived1>
{
    public Derived1Validator()
    {
        RuleFor(d => d.Derived1Name).NotNull();
    }
}

首先创建基本验证器，使其接受泛型类型参数，并指定泛型类型必须是base类型。设置基类的一般规则并继续。

对于验证基类子级的任何验证器，您将从baseValidator继承这些验证器，其中T将是您的派生类类型。

Answer 3

我尝试了Include（）方法，但由于.net core中的swagger生成的模型没有显示任何更改，因此没有给出我想要的结果。什么工作是创建一个新类来继承具有基类

的验证器

/// <summary>
/// Base Class for entity validator classes that specifies a base validator class
/// </summary>
/// <typeparam name="T">The Type being validated</typeparam>
/// <typeparam name="TBaseClass">The validater assigned to the base type of the type being validated</typeparam>
public abstract class BaseAbstractValidator<T, TBaseClass> : AbstractValidator<T>
    where TBaseClass : IEnumerable<IValidationRule>
{
    protected BaseAbstractValidator() => AppendRules<TBaseClass>();

    /// <summary>
    /// Add the set of validation rules
    /// </summary>
    /// <typeparam name="TValidationRule"></typeparam>
    private void AppendRules<TValidationRule>() where TValidationRule : IEnumerable<IValidationRule>
    {
        var rules = (IEnumerable<IValidationRule>)Activator.CreateInstance<TValidationRule>();
        foreach (var rule in rules)
        {
            AddRule(rule);
        }
    }
}

C＃FluentValidation用于类的层次结构

3 个答案: