Question

我有这个问题：

IQueryable<Comment> comments = _commentRepo.Comments
            .Include(c => c.CommentStaff)
            .ThenInclude(c => c.StaffOffices)
            .Where(c => c.CommentAuditId == auditId)
            .OrderByDescending(c => c.CommentDate).Take(3);

StaffOffices是一个多对多的网桥查找POCO，如下所示：

[Table("staff_office")]
public class StaffOffice
{
    [Column("staff_office_staff_id")]
    public short ID { get; set; }
    public Staff Staff { get; set; }

    [Column("staff_office_office_id")]
    public short OfficeID { get; set; }
    public Office Office { get; set; }
}

我需要通过此查询填充Office对象。

所以我正在尝试这个：

正如您所看到的，Office没有出现在Intellisense中，因为我的ThenInclude是关于StaffOffices的。

我怎样才能让它发挥作用？这是否需要使用流畅的API在AppContext模型中定义？

Answer 1

这是一个已知问题，IntelliSense不支持多个级别。您只需输入Office，即可成功构建。

您可以参考以下错误。

8237，9374和4117。

Answer 2

即使它没有在intellisense中显示，它仍然有效。你可以尝试一下。此外，如果您需要员工数据，则必须再次包含StaffOffices。

IQueryable<Comment> comments = _commentRepo.Comments
            .Include(c => c.CommentStaff)
            .ThenInclude(c => c.StaffOffices)
            .ThenInclude(c => c.Office)
            .ThenInclude(c => c.StaffOffices)
            .ThenInclude(c => c.Staff)
            .Where(c => c.CommentAuditId == auditId)
            .OrderByDescending(c => c.CommentDate).Take(3);

如果您选择评论人员回购，多对多级别将是第二级。虽然顺序可能很难直接做到。然后，您必须按照注释变量进行排序。

例如：

var comments = _commentStaffRepo.CommentStaff
            .Include(c => c.StaffOffices)
            .ThenInclude(c => c.Office)
            .Include(c => c.StaffOffices)
            .ThenInclude(c => c.Staff)
            .Include(c => c.Comments)
            .Where(c => c.Comments.Any(co => co.CommentAuditId == auditId))
            .Select(c => c.Comments);
comments = comments.OrderByDescending(c => c.CommentDate).Take(3);

Answer 3

感谢Vivek并在上面发表评论。

现在是我的Component Invoke方法：

public IViewComponentResult Invoke(int auditId)
    {
        IQueryable<Comment> comments = _commentRepo.Comments
            .Include(c => c.CommentStaff)
            .ThenInclude(c => c.StaffOffices).ThenInclude(so => so.Office)
            .Where(c => c.CommentAuditId == auditId)
            .OrderByDescending(c => c.CommentDate).Take(3);

        CommentVM commentVM = new CommentVM
        {
            AuditId = auditId,
            Comments = comments
        };

        return View(commentVM);
    }

我做了另一个级别ThenInclude：

.ThenInclude(c => c.StaffOffices).ThenInclude(so => so.Office)

以下是Razor中的片段：

                        <div class="row">
                            <div class="col-xs-6">
                                <i>@comment.CommentStaff.FullName </i>
                                @if (comment.CommentStaff.StaffOffices.Count() > 1)
                                {
                                <span>@($" ({string.Join(", ", from o in comment.CommentStaff.StaffOffices select o.Office.OfficeOrganizationCd)})")</span>
                                }
                            </div>
                            <div class="col-xs-6">
                                @comment.CommentDate
                            </div>
                        </div>

如何在多对象的第3层使用ThenInclude？

3 个答案: