Accessing the value of every key of a JSON formatted list in Ansible

user_13387983 0
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I have the following list, which I have queried with the help of json_query from cisco controller.

"aci_access_port_list": [
            [
                {
                    "description": [
                        "NOMON KASTOM"
                    ], 
                    "port_name": "E1-17"
                }, 
                {
                    "description": [
                        "ASDF NOMON K"
                    ], 
                    "port_name": "E1-16"
                }, 
                {
                    "description": [
                        "NOMON K9876"
                    ], 
                    "port_name": "E1-15"
                }, 
                {
                    "description": [
                        "LAN5002 TC "
                    ], 
                    "port_name": "E1-46"
                }, 
                {
                    "description": [
                        "LAN5002 TC "
                    ], 
                    "port_name": "E1-47"
                }, 
                {
                    "description": [
                        "NOMON LAN5001 TC "
                    ], 
                    "port_name": "E1-45"
                }, 
                {
                    "description": [
                        "LAN5001 TC "
                    ], 
                    "port_name": "E1-48"
                }, 
                {
                    "description": [
                        "NOMON No Cabling - TEST-4-AUTOMATION"
                    ], 
                    "port_name": "E1-30"
                }, 
                {
                    "description": [
                        "NOMON No Cabling - TEST-6-AUTOMATION"
                    ], 
                    "port_name": "E1-31"
                }
            ]
        ]

I want to check every description key and if it has "NOMON K" written save it into a new list. For this I wrote the following:

- set_fact:
    clean_list: [\n]
- name: getting the clean list of ports and descr.
  set_fact:
    clean_list: "{{clean_list }} \n {{item.0.port_name}} - {{item.1}}"
  loop: "{{ aci_access_port_list[0]|subelements('description') }}"
  when: item.1 is search ("NOMON K")

- debug:
    msg: "{{ clean_list }}"

and this returns:

ok: [acitst-apic.net.dsh.at] => {
    "msg": "[u'\\\\n'] \n E1-17 - NOMON KASTOM \n E1-16 - ASDF NOMON K \n E1-15 - NOMON K9876"
}

What I want to have is same formatting as aci_access_port_lists but I couldn't figure it out. It should look like:

"clean_list":[
                {
                    "description": [
                        "NOMON KASTOM"
                    ], 
                    "port_name": "E1-17"
                }, 
                {
                    "description": [
                        "ASDF NOMON K"
                    ], 
                    "port_name": "E1-16"
                }, 
                {
                    "description": [
                        "NOMON K9876"
                    ], 
                    "port_name": "E1-15"
                }
             ]

I assume there is a better way but I couldn't find it and if somebody can help me I will be glad. Thank you in advance.

ansible-2.x ansible
1 Answers

This is easilly feasible using the selectattr filter and the contains test, targeting the first element of the description list since it always has a single element. Of course, this approach will break if you have several elements in that list.

    - name: Show me a clean list
      vars:                                                                                                  
        clean_list: >-
          {{
            aci_access_port_list.0 |
            selectattr('description.0', 'contains', 'NOMON K') |
            list
          }}
      debug:
        var: clean_list
user_94010960
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