Dynamic path when file upload

I have an action with image upload, and I want config the path with composed address “‘public / images /’ {{$ _ POST.IDProduct}}”
I had already done this for another site, but I seem to remember that it was possible to configure the dynamic path with Wappler
Now I don’t find this possibility, because Wappler only allows me to choose a static parh.
Am I wrong? Or do I have to do it manually by changing the action code?