这是对以下内容的跟进:ServiceStack AutoQuery 合成字段
最新 5.x 版本的 SS 和 .Net Core 上的 .NET Core 空 Web 模板。
我正在尝试创建一个 AutoQuery 服务,我可以用一些合成字段(即不是来自数据库的字段)来装饰它。所以我得到了这个带有以下数据传输对象的 AutoQuery 服务:
public class DataSource {
[Ignore]
public string Hello { get { return "Hello there"; }}
public string DataSourceId { get; set; }
public string DataSourceName { get; set; }
public int DataSourceSort { get; set; }
public bool DataSourceDisabled { get; set; }
public DateTime LastModified { get; set; }
}
当我不包括public string Hello
它时,一切正常。该服务本身只是一个在线服务:
[Route("/query/datasources")]
public class QueryDatasources : QueryDb<DataSource> {}
这是我得到的错误:
Offset0Total0Response Status Error CodeInvalidOperationExceptionMessageSequence contains no matching elementStack Trace[QueryDatasources: 22/03/2019 17:47:41]: [REQUEST: {}] System.InvalidOperationException: Sequence contains no matching element at System.Linq.Enumerable.First[TSource](IEnumerable'1 source, Func'2 predicate) at ServiceStack.OrmLite.OrmLiteDialectProviderBase'1.GetLoadChildrenSubSelect[From](SqlExpression'1 expr) in C:\BuildAgent\work\27e4cc16641be8c0\src\ServiceStack.OrmLite\OrmLiteDialectProviderBase.cs:line 1616 at ServiceStack.OrmLite.SqlServer.SqlServerOrmLiteDialectProvider.GetLoadChildrenSubSelect[From](SqlExpression'1 expr) in C:\BuildAgent\work\27e4cc16641be8c0\src\ServiceStack.OrmLite.SqlServer\SqlServerOrmLiteDialectProvider.cs:line 587 at ServiceStack.OrmLite.Support.LoadList'2..ctor(IDbCommand dbCmd, SqlExpression'1 q) in C:\BuildAgent\work\27e4cc16641be8c0\src\ServiceStack.OrmLite\Support\LoadList.cs:line 46 at ServiceStack.OrmLite.OrmLiteReadCommandExtensions.LoadListWithReferences[Into,From](IDbCommand dbCmd, SqlExpression'1 expr, IEnumerable'1 include) in C:\BuildAgent\work\27e4cc16641be8c0\src\ServiceStack.OrmLite\OrmLiteReadCommandExtensions.cs:line 957 at ServiceStack.OrmLite.OrmLiteExecFilter.Exec[T](IDbConnection dbConn, Func'2 filter) in C:\BuildAgent\work\27e4cc16641be8c0\src\ServiceStack.OrmLite\OrmLiteExecFilter.cs:line 64 at ServiceStack.TypedQuery'2.Execute[Into](IDbConnection db, ISqlExpression query) in C:\BuildAgent\work\3481147c480f4a2f\src\ServiceStack.Server\AutoQueryFeature.cs:line 1089