upload - Uploading multiples files to alternative directory with alternative name in FuelPHP -

i have form having multiple upload fields. let's assume thumbnail image , large image. using fuelphp how can save 2 files 2 different locations renaming them name desired.

for example: want save thumbnail media/images/thumbnail/db_record_id/thumbnail.extension , large image media/images/large/db_record_id/thumbnail.extension

using answer question multiple uploads different directories using fuelphp, can upload desired directories how give desired name?

if want full control, register 'before' callback.

if called before saving file, file object of file. it's passed reference, can alter whatever want.