具有通用枚举的通用 FluentValidation 验证器

Question

I have been experimenting with generics and tried writing a generic validator using a generic enum.

The setup is as following:

I have an interface:

public interface IHasProperties<TEnum> where TEnum : struct, Enum
{
    public IEnumerable<TEnum>? Properties { get; set; }
}

The following models:

public class Model<T>
{
    public IEnumerable<T> ModelWithProperties { get; set; }
}

public class ModelWithProperties : IHasProperties<Properties>
{
    public IEnumerable<Properties> Properties { get; set; }
}

An enum:

public enum Properties
{
    prop1,
    prop2,
    prop3
}

With this I want to create a generic 'properties' validator:

public class ModelPropertiesValidator<T, TEnum> : AbstractValidator<T> where T : IHasProperties<TEnum> where TEnum : struct, Enum
{
    public ModelPropertiesValidator()
    {
        RuleFor(x => x.Properties).NotEmpty();
    }
}

But when I want to use it:

var validator = new ModelPropertiesValidator<Model, Properties>();

The following error pops up:

The type 'Project.Models.Model<Project.Models.ModelWithProperties>' cannot be used as type parameter 'T' in the generic type or method 'ModelPropertiesValidator<T, TEnum>'. There is no implicit reference conversion from 'Project.Models.Model<Project.Models.ModelWithProperties>' to 'Project.Contracts.IHasProperties<Project.Types.Properties>'.

Is something like this possible?

Answer 1

您应该将代码更改为：

var validator = new ModelPropertiesValidator<ModelWithProperties, Properties>();