How to manage file extensions in path templates?

[metrolan]

Hi!
Just installed PaperMerge and, first of all, learning about it.
I am now reading about path templates, and I wonder if file extension is part of document attributes.
For example, let's say a structure where I have a folder for house receipts: /home/house/receipts/
And I have custom fields for Shop and Date. Some receipts are in pdf format, and other are in jpg, say:
img001.jpg with cf['Shop']="Lidl" and cf['Date']=2025.03
0344598.pdf with cf['Shop']="Zara" and cf['Date']=2025.02
I want both of them in the same folder, I understand I can make a path template like:
/home/house/receipts/{{document.cf['Shop']}}-{{document.cf['Date']}}.???
what should I use for the file extension, to keep the same of the document?

Thanks in advance.
BTW, great app!!!

[ciur]

Currently you cannot extract neither filename nor its extension. But it is really great idea to have this functionality and also it is easy to implement.
If you open a ticket, I will implement this feature as part of next release.