EF Core 3.0上的EF Core 2.2 LINQ查询问题

Question

我在升级到EF Core 3.0时遇到了一些问题，在2.2上运行良好的查询不在3.0上运行。例如以下查询：

      var grpedClientData = (from o in db.TicketEvent
                                   where o.ClientId != null && o.SiteId != null && o.DateUtc >= dateHourUTC && o.DateUtc < toDateUTC
                                   group o by new { o.ClientId, o.SiteId, o.OperatorId, o.TicketTypeId, o.ScannerId, o.ClientBookingId, o.TicketSaleOrderId, o.TicketSaleOrderEntryId } into g
                                   select new StatsSummarySiteVisit
                                   {
                                       DateHourVisitedUtc = dateHourUTC,
                                       SiteId = (int)g.Key.SiteId,
                                       OperatorId = g.Key.OperatorId,
                                       ScannerId = g.Key.ScannerId,
                                       TicketTypeId = g.Key.TicketTypeId,
                                       ClientId = g.Key.ClientId,

                                       NumUnique = g.Where(t => t.TicketEventType.IsPermittedEntry).Select(t => t.TicketId).Distinct().Count(), //issue is here

                                       NumNonUnique = g.Count(t => t.TicketEventType.IsPermittedEntry),

                                       NumRejectedUnique = g.Where(t => t.TicketEventType.IsDeniedEntry).Select(t => t.TicketId).Distinct().Count(), //issue is here

                                       NumRejectedNonUnique = g.Count(t => t.TicketEventType.IsDeniedEntry),
                                       IsLocalIdcard = false,
                                       DateLockedUtc = lockDateUTC,
                                       ClientPreBookingId = g.Key.ClientBookingId,
                                       TicketSaleOrderId = g.Key.TicketSaleOrderId,
                                       TicketSaleOrderEntryId = g.Key.TicketSaleOrderEntryId
                                   }).ToList();

我遇到以下错误：

  

LINQ表达式'AsQueryable（Where（       来源：NavigationTreeExpression           值：默认值（IGrouping <<> f__AnonymousType1，Nullable，Nullable，Nullable，Nullable，Nullable，Nullable，Nullable>，TicketEvent>）           表达式：（未处理的参数：e），       谓词：（t）=> t.TicketEventType.IsPermittedEntry））由'NavigationExpandingExpressionVisitor'失败。这可能表示EF Core中存在错误或限制。有关更多详细信息，请参见https://go.microsoft.com/fwlink/?linkid=2101433。

如果有人可以提供帮助，尤其是如何重写它，使其在3.0上可以运行，则不胜感激。