public async Task <QueryResult <IDictionary <string, object> > > QueryRoomDynamic(
            string userId,
            RoomQueryProjection projection,
            IDictionary <string, object> tempData = null,
            RoomQueryFilter filter   = null,
            RoomQuerySort sort       = null,
            RoomQueryPaging paging   = null,
            RoomQueryOptions options = null)
        {
            var query = Rooms.AsNoTracking();

            if (filter != null)
            {
                query = await query.FilterAsync(filter, userId, tempData, context.Booking);
            }
            int?totalCount = null; Task <int> countTask = null;
            var countQuery = query;

            query = query.Project(projection);
            if (options != null && !options.single_only)
            {
                #region List query
                if (sort != null)
                {
                    query = query.Sort(sort);
                }
                if (paging != null && (!options.load_all || !RoomQueryOptions.IsLoadAllAllowed))
                {
                    query = query.SelectPage(paging.page, paging.limit);
                }
                #endregion
                #region Count query
                if (options.count_total)
                {
                    countTask = countQuery.CountAsync();
                }
                #endregion
            }
            if (options != null && options.count_total)
            {
                totalCount = await countTask;
            }
            var queryResult = await query.ToListAsync();

            if (options != null && options.single_only)
            {
                var single = queryResult.FirstOrDefault();
                if (single == null)
                {
                    return(null);
                }
                var singleResult = GetRoomDynamic(single, projection, options);
                return(new QueryResult <IDictionary <string, object> >()
                {
                    SingleResult = singleResult
                });
            }
            var results = GetRoomDynamic(queryResult, projection, options);
            return(new QueryResult <IDictionary <string, object> >()
            {
                Results = results,
                TotalCount = totalCount
            });
        }