LINQ to Entities无法识别方法异常

I have some thing like this

我有这样的事情

SecuritySearcher sc = new SecuritySearcher();
Dictionary<string, bool> groupsMap = 
    sc.GetUserGroupMappings(domainName, currentUser, distGroups.ToList());

IQueryable<HotelTravel> groupq = 
    (from hotel in qHs
    join hp in qHps on hotel.HotelTravelId equals hp.HotelTravelId
    where !string.IsNullOrEmpty(hp.GroupName)
       && groupsMap.ContainsKey(hp.GroupName) 
       && groupsMap[hp.GroupName] == true
    select hotel);
Securi