Home/ Questions/Q 1685
Answered
Ahmad Khan Kolaachi
Asked: 2022-04-29T07:48:55+00:00

check variable null is not in stdout_lines

I have this output

- name: list image exist on nexu
  debug:  
    var: check_image_exist.stdout_lines
  tags:
   - check_image_exist  

ok: [workstation] => {
    "check_image_exist.stdout_lines": [
        "{",
        "  "items" : [ {",
        "    "downloadUrl" : "http://cluster.repo.local:8081/repository/docker_hosted/v2/-/blobs/sha256:aeab776c48375e1a61810a0a5f59e982e34425ff505a01c2b57dcedc6799c17b",",
        "    "repository" : "docker_hosted",",
        "    "format" : "docker",",
        "    "checksum" : {",
        "    },",
        "    "contentType" : "application/vnd.docker.image.rootfs.diff.tar.gzip",",
       
        "  } ],",
        "  "continuationToken" : null",
        "}"
    ]
}

I need check continuationToken null is not, when I use check_image_exist.stdout_lines.continuationToken I get variable not defined!
How do I check?

ansiblestdout
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1 Answer

  1. Best Answer

    You do not have a JSON in the return of your command but a string representation of a JSON, you need to:

    1. Use the stdout property of tour dictionary, so you have the whole string and not a list of strings, like the one provided by stdout_lines
    2. Use from_json in order to have that switch that string to a JSON
    3. Then your expected behaviour kicks in

    So, all together:

    - debug:
    var: (check_image_exist.stdout | from_json).continuationToken
    • 0

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