def add_failure_to_flake(name, flaky_run_key, failure_time, is_step):
flake = Flake.get_by_id(name)
if not flake:
flake = Flake(name=name, id=name, last_time_seen=datetime.datetime.min,
is_step=is_step)
flake.put()
flake.occurrences.append(flaky_run_key)
# TODO(sergiyb): This is necessary to update existing flakes. Remove in July
# 2016 or later.
flake.is_step = is_step
util.add_occurrence_time_to_flake(flake, failure_time)
flake.put()
