c# – Dapper.NET多映射TSecond Deserializer为null

这是查询代码：

const string storedProc = "dbo.GetStopsForRouteID";

        var stops = conn.Query<RouteStop,MapLocation,RouteStop>(
           storedProc,(stop,loc) =>
        {
            stop.Location = loc;
            return stop;
        },new { RouteID = routeId },commandType: CommandType.StoredProcedure);

在第498行的Dapper.cs中：

var deserializer2 = (Func<IDataReader,TSecond>)info.OtherDeserializers[0];

info.OtherDeserializers为null,导致NullReferenceException.

这是存储过程的内容：

SELECT 
    RouteStops.StopID,RouteStops.Name,RouteStops.Description,RouteStops.IsInbound,RouteStops.Location.Lat as Latitude,RouteStops.Location.Long as Longitude
FROM dbo.Routes

INNER JOIN dbo.StopsOnRoute ON
Routes.RouteID = StopsOnRoute.RouteID

INNER JOIN dbo.RouteStops ON
StopsOnRoute.StopID = RouteStops.StopID

WHERE Routes.RouteID = @RouteID
ORDER BY StopsOnRoute.SequenceNumber

我已经对dapper代码进行了广泛的研究,但除了TFirst的deserialiser不是null之外我找不到任何看似不合适的东西,但是TSecond是.当它创建TSecond的反序列化器并将其保留为null时会出现问题吗？

以下是类型：

public class MapLocation
{
    public double Latitude { get; set; }
    public double Longitude { get; set; }
}

public class RouteStop {
    public int StopID { get; set; }

    public string Name { get; set; }
    public string Description { get; set; }
    public bool IsInbound { get; set; }

    public MapLocation Location { get; set; }
}