How to create a report with counts per column for one specific field?

I have a search that breaks down what files were accessed, how much data was retrieved and how many total requests for one particular field. Example search query below:

index="my_index" source="access_log" directory="/my_app/" | chart count(status_code) AS Requests, sum(file_size) AS TotalData, values(path_to_file) AS FileRequested BY directory

The above query produces something like:

directory        Requests      TotalData        FileRequested
my_app           10            345677           html/index.html
                                                images/happy_face.png
                                                dynamic/more_happy.py

While this is fine if you only care about the TOTAL number for the entire directory, I would like to break it down so that I can display the number of requests and total data for each of the files requested listed by the directory. The directory should only be displayed once like the example above. Any suggestions? I've tried a couple of different ways but I cant get the directory to only display once and the rest of the rows populated with relevant data per file requested.