[capink]

Originally Posted by capink

Append the following code under the run() method

Another way to do this without having to hard code the custom column name, is to append this instead to the run() method:

        db = gui.current_db
        for book_id in chain.scope().get_book_ids():
            fmt_paths = []
            fname = chain.evaluate_template(opts.template, book_id)
            if single_dir:
                fname = os.path.basename(fname)
            if opts.formats == 'all':
                formats = db.formats(book_id, index_is_id=True)
            else:
                formats = settings['formats']
            for fmt in [fmt.strip().lower() for fmt in formats.split(',')]:
                fmt_paths.append(os.path.join(path, f'{fname}.{fmt.lower()}'))
            chain.set_book_var(book_id, 'save_to_disk_path', ','.join(fmt_paths))

Now, in your chain, add a second "Single Field Edit", choose the custom column from the dropdown menu and add the following template:

program:
	book_vars('save_to_disk_path')