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我嘗試在firebird sql server上使用linq2db。 我有兩個表,有相關性。如何在linq2db中使用關聯
[Table("REQUESTS")]
public partial class Request
{
[Column("ID")]
[PrimaryKey]
public int Id { get; set; }
[Column("LATEST_REQUEST_DATA_ID")]
public int? LatestRequestDataId { get; set; }
[Association(ThisKey="LATEST_REQUEST_DATA_ID", OtherKey="ID")]
public virtual RequestData LatestData { get; set; }
}
[Table("REQUEST_DATA")]
public class RequestData
{
[Column("ID")]
[PrimaryKey]
public int Id { get; set; }
[Column("REQUEST_ID")]
public int RequestId { get; set; }
}
public class RequestDb : DataConnection
{
public ITable<Request> Requests { get { return GetTable<Request>(); } }
public ITable<RequestData> Data { get { return GetTable<RequestData>(); } }
}
...
using (var context = new RequestDb())
{
var r = context.Requests.FirstOrDefault();
var d = context.Data.FirstOrDefault(dd => dd.Id == r.LatestRequestDataId);
Console.WriteLine(r);
}
我也得到d,其中有結果後,我試圖從r.LatestData的結果,但我得到r.LatestData是空 爲什麼我得到r.LatestData = NULL?