我得到了一个将数据发布到cassandra表的方法。不知何故，我能够（有时）添加不应该发生的重复行。下面是我为此编写的方法。我正在检查，如果该名称已经存在，如果是，没有数据应张贴。
有什么明显的遗漏吗？

print(args)
    jm = Jenkins()
    #print(json.dumps(args, sort_keys=True, indent=4))

    for i in args:
        jm.name = i['fullDisplayName']
        jm.result = i['result']
        jm.jobnumber = str(i['id'])
        jm.executor = i['executor']
        jm.duration = str(i['duration'])
        jm.time_stamp = str(i['timestamp'])
        jm.url = i['url']
        jm.id = str(uuid.uuid4())

        check_if_table_is_empty = len(Jenkins.objects.all())
        if (check_if_table_is_empty is 0):
                Jenkins.create(name=jm.name, result=jm.result, jobnumber=jm.jobnumber, executor=jm.executor,
                                      duration=jm.duration, time_stamp=jm.time_stamp, url=jm.url, id=jm.id)
                return jm.id
        else:
                for data in Jenkins.objects.all():
                        if (data['name'] == jm.name):
                                return data['id']
                        else:
                                jm.save()
                                return jm.id

 id                                   | duration | executor | jobnumber | name                       | result  | time_stamp    | url
--------------------------------------+----------+----------+-----------+----------------------------+---------+---------------+---------------------------------------------------------
 5dd7ba97-fd93-4a54-bce6-002502f0e96b |     7912 |     null |        10 | alten-training-develop #10 | ABORTED | 1530273379763 |**********************
 7d8209f3-d5fd-4fa3-9c6c-1f5030928407 |    30222 |     null |         6 |        adbridge-develop #6 | FAILURE | 1529907888157 |      **********************
 a43f00df-a6cf-45d9-9190-fe06cfa28327 |    30222 |     null |         6 |        adbridge-develop #6 | FAILURE | 1529907888157 |      **********************

 servicename            | address              | matchtype  | samplingtype | servicetype
------------------------+----------------------+------------+--------------+-------------
 alten-training-develop |*****.*****.se:8081 | ['RegEx1'] |         HTTP |     Jenkins
       adbridge-develop |*****.****.se:8081 | ['RegEx1'] |         HTTP |     Jenkins