(最佳实践)FluentValidation和检查重复实体 [英] (Best Practice) FluentValidation and Checking Duplicate Entities

问题描述

我有一个带有3个主键的表(连接表)，因此当我要检查重复记录时，必须一起检查3个属性

I have a table (junction table) with 3 primary keys so when I want to check duplicate records , I must check 3 properties together

我写了这样的方法

    private bool IsDuplicate(long roleId, long componentGroupId, long operationId)
    {
        var business = new RoleGroupBusiness();
        var result = business.Where(x => x.RoleID == roleId && x.ComponentGroupID == componentGroupId && x.OperationID == operationId).Any();
        return result;
    }

我有一个像这样的FluentValidator类:

and I have a FluentValidator class like this :

public class RoleGroupValidator : AbstractValidator<RoleGroup>
{

    private bool IsDuplicate(long roleId, long componentGroupId, long operationId)
    {
        var business = new RoleGroupBusiness();
        var result = business.Where(x => x.RoleID == roleId && x.ComponentGroupID == componentGroupId && x.OperationID == operationId).Any();
        return result;
    }
    public RoleGroupValidator()
    {
        RuleFor(x => x.RoleID).NotNull().WithMessage("A");
        RuleFor(x => x.ComponentGroupID).NotNull().WithMessage("A");
        RuleFor(x => x.OperationID).NotNull().WithMessage("A");    
    }

}

1)如何在FluentValidator中使用IsDuplicate方法?

1) How can i use IsDuplicate methid in FluentValidator ?

或

2)检查实体的最佳方法是在fluentValidation库中是否重复?

2) What is best way for checking entity is Duplicate or not in fluentValidation Library ?

RuleFor只让我获得其中一个属性的值，但我需要所有属性的值才能传递给我的方法

RuleFor only get me value of one of properties but I need value of all properties for passing to my method

推荐答案

您应使用Must方法:

You should use Must method:

public class RoleGroupValidator : AbstractValidator<RoleGroup>
{
    public RoleGroupValidator()
    {
        RuleFor(x => x.RoleID).NotNull().WithMessage("A");
        RuleFor(x => x.ComponentGroupID).NotNull().WithMessage("A");
        RuleFor(x => x.OperationID).NotNull().WithMessage("A");
        RuleFor(x => x).Must(x => !IsDuplicate(x));
    }

    private bool IsDuplicate(RoleGroup r)
    {
        var business = new RoleGroupBusiness();
        return business.Any(x => x.RoleID == r.RoleID &&
                                 x.ComponentGroupID == r.ComponentGroupID &&
                                 x.OperationID == r.OperationID);
    }
}

如果它是可抛弃的(可能是)，请不要忘记处理RoleGroupBusiness实例:

Don't forget to dispose RoleGroupBusiness instance if it's disposable(it probably is):

private bool IsDuplicate(RoleGroup r)
{
    using (var business = new RoleGroupBusiness())
    {
        return business.Any(x => x.RoleID == r.RoleID &&
                             x.ComponentGroupID == r.ComponentGroupID &&
                             x.OperationID == r.OperationID);
    }
}

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