RskFactorRelation.Instance.GetCache
     
      (true).Where(x => !string.IsNullOrEmpty(x.SourceProductTable) && !string.IsNullOrEmpty(x.SourceProductId))                        .GroupBy(x=>x.SourceProductTable+","+x.SourceProductId)                        .Select(x=>x.FirstOrDefault())                        .ToDictionary(x => x.IndexPriceFactorId);