Having difficulty using a generator? object?

[J. Norment]

Would like to be able to check contents of json.items.*.labels[*] and json.items.*.labels[*].value from json below:

I'm unsure how to get the contents of the generator from ansible / jinja2.

- name: Test json

  debug: "msg={{ json.items|map(attribute='metadata') }}"

$ ansible-playbook -i inv/dev k8s-redis.yml --extra-vars "@test-var.json"

Gives me:

TASK [k8s-redis : Test json] ***************************************************

ok: [aus-ared-dev-00] => {

    "msg": "<generator object do_map at 0x224de60>"

}

This is the json:

{"json": {

    "apiVersion": "v1",

    "items": [

                {

                    "metadata": {

                        "creationTimestamp": "2016-03-22T18:18:48Z",

                        "labels": {

                            "kubernetes.io/hostname": "aus-akn-dev-00.q2dc.local"

                        },

                        "name": "aus-akn-dev-00.q2dc.local",

                        "resourceVersion": "557645",

                        "selfLink": "/api/v1/nodes/aus-akn-dev-00.q2dc.local",

                        "uid": "85b7ae17-f05a-11e5-b8a3-005056bc5b54"

                    }

                },

                {

                    "metadata": {

                        "creationTimestamp": "2016-03-23T19:49:22Z",

                        "labels": {

                            "kubernetes.io/hostname": "aus-akn-dev-01.q2dc.local"

                        },

                        "name": "aus-akn-dev-01.q2dc.local",

                        "resourceVersion": "557644",

                        "selfLink": "/api/v1/nodes/aus-akn-dev-01.q2dc.local",

                        "uid": "57306016-f130-11e5-975f-005056bc5b54"

                    }

                }

             ]

}}

I've tried |to_json, |from_json, |list, combinations of the preceding, and even building custom filters to try to work with the generator object directly.

[Matt Martz]

There are likely a few problems.  The first is that `items` has a naming collision with the .items() method of a python dictionary, so you need to use `json['items']` instead.

After that, you will also likely need to use the |list filter too.  So something like:

json['items']|map(attribute='metadata')|list

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Matt Martz
@sivel
sivel.net