Question

在内存中创建POCO之后，我在存储库对象上调用Save方法。然后我需要使用在保存操作期间创建的数据库ID更新POCO。我是否应该使用ref传递对象，只需让save方法返回ID并从调用页面手动更新对象，或者是什么？

以下是一些示例代码：

public GiftCertificateModel
{
    public int GiftCerticiateId {get;set;}
    public string Code {get;set;}
    public decimal Amount {get;set;}
    public DateTime ExpirationDate {get;set;}

    public bool IsValid()
    {}
}




public GiftCertificateRepository
{

    public GiftCertificateModel GetById(int GiftCertificateId)
    {
        //call db to get one and return single model
    }

    public List<GiftCertificateModel> GetMany()
    {
        //call db to get many and return list
    }

    public string GetNewUniqueCode()
    {
        //randomly generates unique code
        return code;
    }

    public GiftCertificateModel CreateNew()
    {
        GiftCertificateModel gc = new GiftCertificateModel();
        gc.Code = GetNewUniqueCode();
        return gc;
    }


    //should this take by ref or just return the id or return a full new model?
    public void Save(GiftCertificateModel gc)
    {
        //call db to save
    }
}

GiftCertificateRepository gcRepo = new GiftCertificateRepository();
GiftCertificateModel gc = gcRepo.CreateNew();
gc.Amount = 10.00M;
gc.ExpirationDate = DateTime.Today.AddMonths(12);
gc.Notes = "Test GC";
gcRepo.Save(gc);

Answer 1

存储库应保存您的POCO，只需在gc.Id方法中填写Save，方法是在保留对象后查询Id，并且调用方法会看到。{/ p>

GiftCertificateRepository gcRepo = new GiftCertificateRepository();
GiftCertificateModel gc = gcRepo.CreateNew();
gc.Amount = 10.00M;
gc.ExpirationDate = DateTime.Today.AddMonths(12);
gc.Notes = "Test GC";
gcRepo.Save(gc);
int Id = gc.Id; // Save populate the Id

在保存到数据库方法后，存储库模式应如何更新对象的ID？

1 个答案: