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不同场景下的实体验证

entity validation asp.net-mvc

0

dariol · 技术社区 · 17 年前

假设我有两个字段的实体。某些字段在某些特定状态下是必需的,但其他字段仅在进一步/其他状态下需要。

public class Entity
{
    //Required always
    public SomeReference {}

    //Required in specific situation/scenario
    public OtherReference {}
}

寻求帮助: 乌迪大汉对此有一些想法。 http://www.udidahan.com/2007/04/30/generic-validation/

2 回复 | 直到 17 年前

1

Dai Bok 16 年前

我有一个解决方案,我正在使用。我使用 Fluent validation

public class User {
    public virtual string Name { get; set; }
    public virtual string Email { get; set; }
    public virtual string Password { get; set; }
    public virtual Address Address { get; set; }        
}

public class Address {
    public virtual string Address1 { get; set; }
    public virtual string PostCode { get; set; }
}

    public AddressValidator() {
        RuleFor(address => address.Address1)
            .NotNull()
            .WithMessage("Please enter the first line of your address");

        RuleFor(address => address.PostCode)
            .NotNull()
            .WithMessage("Please enter your postcode")
            .Matches(UK_POSTCODE_REGEX)
            .WithMessage("Please enter a valid post code!");
    }

    public UserValidator() {
        RuleFor(user => user.FirstName)
            .NotNull()
            .WithMessage("Please provide a first name")
            .Length(3, 50)
            .WithMessage("First name too short");

        RuleFor(user=> user.Password)
            .Length(8, 50)
            .WithMessage("Password is too short");
    }

然后创建一个模型验证器,例如,假设我们有一个表单,用户在其中输入一个地址,我们创建一个AddressModelValidator,可以重用我们编写的验证器:

    public AddressModelValidator()  {
        RuleFor(user => user.id)
            .NotNull()
            .WithMessage("An error has occured, please go back and try again");

        RuleFor(user => user.Address).SetValidator(new AddressValidator());
    }

所以,考虑一下,你真的可以创建一些好的模型,并减少你的验证代码重复!

2

0

Andrew Siemer 17 年前

public void Validate()
{
    if(!IsValid)
        throw new ValidationException("Rule violations prevent saving");
}

public bool IsValid
{
    get { return GetRuleViolations().Count() == 0;}
}

public IEnumerable<RuleViolation> GetRuleViolations()
{
    if(this.TermID == 0)
        yield return new RuleViolation(HelpMessageService.GetHelpMessageBodyByID(1), "agreeWithTerms");

    if(ValidationService.ValidateDate(this.Birthdate.ToString()))
        yield return new RuleViolation(HelpMessageService.GetHelpMessageBodyByID(2), "birthDate");

    if (!(Username.Length >= ConfigurationService.GetMinimumUsernameLength()) ||
        !(Username.Length <= ConfigurationService.GetMaximumUsernameLength()))
        yield return new RuleViolation(HelpMessageService.GetHelpMessageBodyByID(5), "username");

    if(ValidationService.ValidateUsernameComplexity(Username))
        yield return new RuleViolation(HelpMessageService.GetHelpMessageBodyByID(6), "username");

    if (AccountID == 0 && ObjectFactory.GetInstance<IAccountRepository>().UsernameExists(this.Username))
        yield return new RuleViolation(HelpMessageService.GetHelpMessageBodyByID(7), "username");

    if (!ValidationService.ValidateEmail(Email))
        yield return new RuleViolation(HelpMessageService.GetHelpMessageBodyByID(8), "email");

    if (AccountID == 0 && ObjectFactory.GetInstance<IAccountRepository>().EmailExists(this.Email))
        yield return new RuleViolation(HelpMessageService.GetHelpMessageBodyByID(9), "email");

    yield break;
}

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