Added new field type file upload

[dasu2013]

Thank you so much for this valuable plugin. We are using this plugin in course module level and we added new field type, file upload. I thought it is worth to share it.

[mchurchward]

Got an error when adding a field:
Notice: Undefined property: stdClass::$defaultdata in /Users/mikechurchward/www/moodlehq.git/local/metadata/definelib.php on line 364

When I accessed the module metadata form, got these errors:
Warning: Use of undefined constant FILE_INTERNAL - assumed 'FILE_INTERNAL' (this will throw an Error in a future version of PHP) in /Users/mikechurchward/www/moodlehq.git/local/metadata/fieldtype/fileupload/classes/metadata.php on line 44



Warning: Use of undefined constant FILE_EXTERNAL - assumed 'FILE_EXTERNAL' (this will throw an Error in a future version of PHP) in /Users/mikechurchward/www/moodlehq.git/local/metadata/fieldtype/fileupload/classes/metadata.php on line 44

These ones were fixed with a "require_once($CFG->dirroot . '/repository/lib.php');

[mchurchward]

I think this is useful, but I can't see how to use it well.
I was able to attach a file to an activity module, but other than seeing in an editor as an attached file, I am unable to see the file.
Have you had this working?
This is for 3.10 by the way.