refresh_metadata plugin allows you to re-extract metadata
from an uploaded file.
UploadedFile#refresh_metadata! method, which
triggers metadata extraction (calls
with the uploaded file opened for reading, and updates the existing
metadata hash with the results.
uploaded_file.refresh_metadata! uploaded_file.metadata # re-extracted metadata
For remote storages this will make an HTTP request to open the file for reading, but only the portion of the file needed for extracting each metadata value will be downloaded.
If the uploaded file is already open, it is passed to metadata extraction as is.
uploaded_file.open do uploaded_file.refresh_metadata! # ... end