def get_change_object(change):
"""
Retrieves a Change from a given change API object, getting user data from
the API and saving the User if it doesn't already exist in the DB.
"""
try:
return Change.get(Change.change_id == change['rcid'])
except DoesNotExist:
size_diff = change['newlen'] - change['oldlen']
timestamp_dt = parse_iso_dt(change['timestamp'])
return Change.create(change_id=change['rcid'],
change_type=change['type'],
user=get_user_object(change['user']),
timestamp=timestamp_dt,
page=get_page_object(change['pageid']),
comment=change['comment'],
size_diff=size_diff)
