Question

我们正在设法升级至3国,现在我对以下林克问题表示怀疑。它的回报是,“只有一种表述可以在选择清单中具体指明,而该次顺序没有出现EXISTS错误。

这是控制器中的lin。

var list = (from item in ItemTasks.FindTabbedOrDefault(tab)
                    select new ItemSummary
                               {
                                   Id = item.Id,
                                   LastModifyDate = item.LastModifyDate,
                                   Tags = (from tag in item.Tags
                                           select new TagSummary
                                                      {
                                                          ItemsCount = tag.Items.Count,
                                                          Name = tag.Name
                                                      }).ToList(),
                                   Title = item.Title
                               });

如下:

select   TOP ( 1 /* @p0 */ ) item0_.Id             as col_0_0_,
                 item0_.LastModifyDate as col_1_0_,
                 (select (select cast(count(* ) as INT)
                          from   dbo.ItemsToTags items3_,
                                 dbo.Item item4_
                          where  tag2_.Id = items3_.Tag_id
                                 and items3_.Item_id = item4_.Id),
                         tag2_.Name
                  from   dbo.ItemsToTags tags1_,
                         dbo.Tag tag2_
                  where  item0_.Id = tags1_.Item_id
                         and tags1_.Tag_id = tag2_.Id) as col_2_0_,
                 item0_.Title          as col_3_0_ from     dbo.Item item0_ order by item0_.ItemPostDate desc

ps: 如果拆除了林克矿区中的塔格斯财产,则会进行罚款。

问题在哪里?

提前感谢。

Answer 1

I ve got the same Generic ADO Exception error, I think it s actually the limitation of SQL server; Is it possible somehow load object graph with projections in collections?

如果我尝试:

var cats = q.Select(t => new cat()
                                          {
                                              NickName = t.NickName,
                                              Legs = t.Legs.Select(l => new Leg()
                                                                            {
                                                                                Color = l.Color,
                                                                                Size = l.Size
                                                                            }).ToList()
                                          }).ToList();

这同样是错误的。

友情链接