'Create a rule and append to the end of the priority list.'

@classmethod
def create(self, subreddit, short_name, description, kind=None, created_utc=None):

    try:
        priority = len(list(self._cf.get(subreddit._id36)))
    except tdb_cassandra.NotFoundException:
        priority = 0
    if (priority >= MAX_RULES_PER_SUBREDDIT):
        return
    blob = self.get_rule_blob(short_name, description, priority, kind, created_utc)
    self._set_values(subreddit._id36, blob)
