public async Task <QueryResultModel <TaskGroupEntity> > Query(TaskGroupQueryModel model)
        {
            var paging = model.Paging();
            var query  = dbSet.AsQueryable();

            if (!model.GroupName.IsNull())
            {
                query = query.Where(a => a.GroupName.Contains(model.GroupName));
            }

            if (!paging.OrderBy.Any())
            {
                query = query.OrderByDescending(m => m.GroupCode);
            }
            return(await query.PaginationGetResult(paging));
        }