If value is null, it must be updated in database. Else previous values is never updated.
If value is null, it must be updated in database. Else previous values is never
updated.

dilawar/ncbs-hippo,dilawar/ncbs-hippo,dilawar/ncbs-hippo,dilawar/ncbs-hippo,dilawar/ncbs-minion,dilawar/ncbs-minion,dilawar/ncbs-minion,dilawar/ncbs-hippo,dilawar/ncbs-minion,dilawar/ncbs-minion