如何使用自動映射器將傳入數據存儲到數據庫

Question

我正在使用ASP.NET Core 5和Automapper，據我所知，Automapper是為了節省map數據的時間（如果我弄錯了，請糾正我）。 我的DbContext中有這些實體類：

public class FinLegCheckEntity
{
    [Key]
    public int Id { get; set; }
    public int CustomerId { get; set; } = default!;
    public string? CustomerRef { get; set; } = default!;
    public int KYClevel { get; set; } = default!;
    public List<PlatformKYCLevels> PlatformKycLevels { get; set; } = default!;
    public DateTimeOffset Created { get; set; }
    public DateTimeOffset Modified { get; set; }
}

public class PlatformKYCLevels
{
    [Key]
    public int Id { get; set; }
    public int Level { get; set; } = default!;
    public string MaxAmount { get; set; } = default!;
    public string Currency { get; set; } = default!;
}

我基於上面的 class 構建了我的數據庫表，並且我有 model 類，當我從其他服務獲取數據時使用它，所以我需要 map 這兩個類：

public class FinLegCheckModel
{
    public int Id { get; set; }
    public int CustomerId { get; set; } = default!;
    public string? CustomerRef { get; set; } = default!;
    public int KYClevel { get; set; } = default!;
    public List<PlatformKYCLevels> PlatformKycLevels { get; set; } = default!;
    public DateTimeOffset Created { get; set; }
    public DateTimeOffset Modified { get; set; }
}

public class PlatformKYCLevels
{
    public int Id { get; set; }
    public int Level { get; set; } = default!;
    public string MaxAmount { get; set; } = default!;
    public string Currency { get; set; } = default!;
}

我為這兩個類創建了 map 的配置文件：

public class FinLegCheckProfile:Profile
{
    public FinLegCheckProfile()
    {
        CreateMap<FinLegCheckEntity,FinLegCheckModel>();
    }
}

好吧，我希望到目前為止我的方向是正確的，所以我從外部獲取數據，如果數據已經存在於數據庫中，我將更新我的數據庫，否則我將添加，這是我遇到問題的地方：應該如何我使用自動映射器：

var customerFincheckData = dbContext.FinLegCheckEntities.FirstOrDefault(s => s.CustomerId == fincheckdata.CustomerId);

if (customerFincheckData != null)
{
    customerFincheckData.CustomerId = fincheckdata.CustomerId;
    customerFincheckData.KYClevel = fincheckdata.KYClevel;
    customerFincheckData.PlatformKycLevels = fincheckdata.PlatformKycLevels;
    customerFincheckData.CustomerRef = fincheckdata.CustomerRef;
    customerFincheckData.Modified = DateTimeOffset.UtcNow;
                         
    dbContext.FinLegCheckEntities.Update(customerFincheckData);
    dbContext.SaveChanges();

    return Task.FromResult(true);
}
else
{
    var finlegEntities = new FinLegCheckEntity()
                             {
                                 CustomerId = fincheckdata.CustomerId,
                                 KYClevel = fincheckdata.KYClevel,
                                 PlatformKycLevels = fincheckdata.PlatformKycLevels,
                                 CustomerRef = fincheckdata.CustomerRef,
                                 Created = DateTimeOffset.UtcNow,
                                 Modified = DateTimeOffset.UtcNow
                              };
    dbContext.FinLegCheckEntities.Add(finlegEntities);
    dbContext.SaveChanges();

    return Task.FromResult(true);
}

我已將IMapper注入 class 並且我可以訪問_mapper.Map但問題是映射后如何存儲或更新數據庫？

Answer 1

我認為您不需要任何 DTO，因為它與實體 class 相同。 嘗試這個

public ActionResult AddOrUpdate(FinLegCheckEntity model)
{
var existedFincheckData = dbContext.FinLegCheckEntities.FirstOrDefault(s => s.CustomerId == fincheckdata.CustomerId);

if (existedFincheckData != null)
{
    model.Modified = DateTimeOffset.UtcNow;
    dbContext.Entry(existedFincheckData).CurrentValues.SetValues(model);
}
else
{
    model.Created = DateTimeOffset.UtcNow,
     model.Modified = DateTimeOffset.UtcNow
     dbContext.FinLegCheckEntities.Add(model);
}
 dbContext.SaveChanges();

......
}