def new_source(self):
fid_len = random.randint(4, 32)
designation_len = random.randint(4, 32)
source = Source(
random_chars(fid_len, nullable=False,
chars=string.ascii_lowercase),
random_chars(designation_len, nullable=False))
source.flagged = bool_or_none()
source.last_updated = random_datetime(nullable=False)
source.pending = False
db.session.add(source)
db.session.flush()
self.sources.append(source.id)
