JMESPathTypeError 在 Ansible 中使用 json_query 过滤器和 starts_with 时出错 [英] JMESPathTypeError when using json_query filter in Ansible with starts_with
问题描述
我正在尝试过滤来自 Ansible 中 boto3 的结果.
I am trying to filter results that arrived from boto3 in Ansible.
当我在没有[?starts_with(...)]"的结果上使用 json 查询时它运行良好,但是当添加 starts_with 语法时:
When I use json query on the results without the "[?starts_with(...)]" it works well, but when adding the starts_with syntax:
"state_machines[?starts_with(name,'hello')].state_machine_arn"
为了过滤结果:
{u'boto3': u'1.4.4', u'state_machines':
[{u'state_machine_arn': u'<state machine arn 1>', u'name': u'hello_world_sfn', u'creation_date': u'2017-05-16 14:26:39.088000+00:00'},
{u'state_machine_arn': u'<state machine arn 2>', u'name': u'my_private_sfn', u'creation_date': u'2017-06-08 07:25:49.931000+00:00'},
{u'state_machine_arn': u'<state machine arn 3>', u'name': u'alex_sfn', u'creation_date': u'2017-06-14 08:35:07.123000+00:00'}],
u'changed': True}" }
我希望得到第一个 state_machine_arn 值:state machine arn 1"
I expect to get the first state_machine_arn value: "state machine arn 1"
但相反,我得到了例外:
But instead, I get the exception:
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: JMESPathTypeError: In function contains(), invalid type for value: <lamdba_name>, expected one of: ['array', 'string'], received: "unknown" fatal: [localhost]: FAILED!
=> {"failed": true, "msg": "Unexpected failure during module execution.", "stdout": ""}
可能是什么问题?
推荐答案
问题是 json_query 过滤器期望得到一个带有 ascii 字符串的字典,但是你提供的是 unicode 字符串(注意 u'blabla'
在您的输入中).
The problem is that json_query filter expects to get a dictionary with ascii strings, but what you're providing it are unicode strings (notice the u'blabla'
in your input).
这是 json_query 的一个问题,显然是在 Ansible 2.2.1 中引入的(虽然不是很清楚),这里有更多细节:https://github.com/ansible/ansible/issues/20379#issuecomment-284034650
This is an issue with json_query that apparently got introduced in Ansible 2.2.1 (although that is not really clear), here are some more details: https://github.com/ansible/ansible/issues/20379#issuecomment-284034650
我希望这会在未来的版本中得到修复,但目前这是一种对我们有用的解决方法:
I hope this gets fixed in a future version, but for now this is a workaround that worked for us:
"{{ results | to_json | from_json | json_query(jmespath_query) }}"
其中 jmespath_query
是一个包含 starts_with
查询的变量.这个往返 json 的技巧将 unicode 字符串转换为 ASCII 字符串 :)
Where jmespath_query
is a variable that contains a starts_with
query.
This trick of going to and from json turns the unicode strings into ASCII ones :)
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