Add File Path as Spotlight Comment to multiple files using Automator and AppleScript

You just forgot the “end repeat”:

repeat with thisfile in input

set theComment to POSIX path of thisfile

set comment of (thisfile as alias) to theComment

end repeat

In Spotlight (or Finder search) you would use comment:string, where string could be a folder in a given POSIX path. Thus, if the file had originally been on your Desktop, you would use comment:Desktop to show the file(s) bearing that POSIX path in their comment field.

My pleasure.

In addition to closing the repeat loop, you might also consider pre-existing comments.

As written, your script replaces any existing comment with the file's path. What if the file already has a comment? Are you prepared/expecting to lose that?

This revision prepends the path to any existing comment:

repeat with thisfile in input

set theComment to (POSIX path of thisfile) & return & (get comment of (thisfile as alias))

set comment of (thisfile as alias) to theComment

end repeat