this namedblobfile always pops up on the list of modified fields, even though "Keep existing file" is selected with the widget.
I'm thinking this is a bug, and looks like it's a bug in the widget not setting the value to z3c.form.interfaces.NOT_CHANGED
z3c.form.form.applyChanges computes what fields have changed. It specifically looks for this:
A namedblobfile will fail this check and move on to util.changedField whose job it is to really check if a value changed. This is hot wired to return true b/c namedblobfile implements zope.schema.interfaces.IObject
I have some other options here to avoid triggering 'the video file data changed' but wanted to check here first.
Anyone know of a better file field widget?
Should I file a bug against plone.formwidget.namedfile?