Key argument to _get_changed_fields is unused.

[amcgregor]

In mongoengine/base/document.py line 394:

def _get_changed_fields(self, key='', inspected=None):

The only occurrences of assignment when calling is within that function on line 425:

changed = field._get_changed_fields(key, inspected)

And 439:

changed = value._get_changed_fields(list_key, inspected)

However it is never used within that function or passed to any other. In fact, it is overridden, unused, if execution reaches line 415, which is always executed before either instance of use:

key = '%s.' % db_field_name

And is thus just pointless data being thrown around, unless I'm missing something that may be glaringly obvious. ;)

[rozza]

hmm - probably some old cruft that needs cleaning up - will have a look for 0.8.2

[rozza]

good spot! Removed :)