Question

我遇到查询问题

我需要从SHIPMENT取出GetAllOrderData - 您可以找到POD_DATE和RECEIVE_NAME的同一个地方......但我收到错误

错误1当前上下文中不存在名称“x”

我的代码是：

public IEnumerable<ReportItemDTO> GetTaskProgress(DateTime targetDate)
{
   try
   {
      var startDate = targetDate.Date;
      var endDate = startDate.AddDays(1);
      OrderDataRepository rep = new OrderDataRepository();

      var query = rep.GetAllOrderData()
                  .Where(x => x.POD_DATE >= startDate && x.POD_DATE <= endDate)
                  .GroupBy(o => o.User)
                  .Select(g => new ReportItemDTO
                    {
                      DriverId = g.Key.Id,
                      PdriverName = g.Key.Name,
                      OrderCount = g.Count(),
                      ReportedOrdersCount = g.Count(o => o.RECEIVE_NAME != null),
                      SHIPMENT = (x.SHIPMENT)
                    } );

      return query;

Answer 1

  SHIPMENT = (x.SHIPMENT)

当您尝试进行分配时，您处于分组范围内 - 每个分组中的许多货件不仅仅是一个 - 实际上是该特定用户的所有货件。假设你想要一个集合，你可以这样做：

Shipments = g.Select( x=> x.SHIPMENT)

修改

如果您只是希望每个用户的第一批货物（有点不合逻辑但适合您的数据模型）：

SHIPMENT = g.Select( x=> x.SHIPMENT).First()

实体框架查询语法

1 个答案: