ansible - Look up YAML file with given path - Stack Overflow

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Here is my sample YAML file input.yaml.

name: "My name"
surname: "Bar"
address:
  city: "My city"
  street: "My street"
  number: 1

I am trying print full path to each key and its value, while iterating over it.

list.yaml

- name: "Playing with Ansible"
  hosts: localhost
  tasks:
    - name: "Reading yaml file"
      ansible.builtin.shell: "cat input.yaml"
      register: input_yaml_content
  
    - name: "Parse yaml into variable"
      set_fact:
        my_yaml: "{{ input_yaml_content.stdout | from_yaml }}"

    - name: "Finding all paths"
      set_fact:
        paths: "{{ my_yaml | ansible.utils.to_paths }}"

    - name: "Printing key-values"
      debug:
        msg: "Key: {{ item }}, value: **{{ my_yaml[item] }}**"
      with_items: "{{ paths }}"

How can I print the value of each path?

Above code works for name, surname. But it fails for address.

ok: [localhost] => (item=name) => {
    "msg": "Key: name, value: My name"
}
ok: [localhost] => (item=surname) => {
    "msg": "Key: surname, value: Bar"
}
fatal: [localhost]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'dict object' has no attribute 'address.city'. 'dict object' has no attribute 'address.city'

Here is my sample YAML file input.yaml.

name: "My name"
surname: "Bar"
address:
  city: "My city"
  street: "My street"
  number: 1

I am trying print full path to each key and its value, while iterating over it.

list.yaml

- name: "Playing with Ansible"
  hosts: localhost
  tasks:
    - name: "Reading yaml file"
      ansible.builtin.shell: "cat input.yaml"
      register: input_yaml_content
  
    - name: "Parse yaml into variable"
      set_fact:
        my_yaml: "{{ input_yaml_content.stdout | from_yaml }}"

    - name: "Finding all paths"
      set_fact:
        paths: "{{ my_yaml | ansible.utils.to_paths }}"

    - name: "Printing key-values"
      debug:
        msg: "Key: {{ item }}, value: **{{ my_yaml[item] }}**"
      with_items: "{{ paths }}"

How can I print the value of each path?

Above code works for name, surname. But it fails for address.

ok: [localhost] => (item=name) => {
    "msg": "Key: name, value: My name"
}
ok: [localhost] => (item=surname) => {
    "msg": "Key: surname, value: Bar"
}
fatal: [localhost]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'dict object' has no attribute 'address.city'. 'dict object' has no attribute 'address.city'

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2 Answers 2

Sorted by: Reset to default 3

You are making this overly complicated with too many tasks. Just get the file, parse it as yaml and transform it to paths:

The following playbook

---
- name: Yaml as paths
  hosts: localhost
  gather_facts: false

  vars:
    my_data: "{{ lookup('ansible.builtin.file', 'input.yaml') | from_yaml }}"

  tasks:
    - name: Print key/values
      ansible.builtin.debug:
        var: my_data | ansible.utils.to_paths

gives using your above file as input:

$ ansible-playbook list.yaml 

PLAY [Yaml as paths] ***********************************************************************************************************************************************************

TASK [Print key/values] ********************************************************************************************************************************************************
ok: [localhost] => {
    "my_data | ansible.utils.to_paths": {
        "address.city": "My city",
        "address.number": 1,
        "address.street": "My street",
        "name": "My name",
        "surname": "Bar"
    }
}

PLAY RECAP *********************************************************************************************************************************************************************
localhost                  : ok=1    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

If you still want to loop over each entry for whatever reason, simply transform the paths dict to a list of key/values:

---
- name: Yaml as paths
  hosts: localhost
  gather_facts: false

  vars:
    my_data: "{{ lookup('ansible.builtin.file', 'input.yaml') | from_yaml }}"

  tasks:
    - name: Loop over key/values
      ansible.builtin.debug:
        msg: "{{ item.key }} has value {{ item.value }}"
      loop: "{{ my_data | ansible.utils.to_paths | dict2items }}"

gives:

$ ansible-playbook list.yaml 

PLAY [Yaml as paths] ***********************************************************************************************************************************************************

TASK [Loop over key/values] ****************************************************************************************************************************************************
ok: [localhost] => (item={'key': 'name', 'value': 'My name'}) => {
    "msg": "name has value My name"
}
ok: [localhost] => (item={'key': 'surname', 'value': 'Bar'}) => {
    "msg": "surname has value Bar"
}
ok: [localhost] => (item={'key': 'address.city', 'value': 'My city'}) => {
    "msg": "address.city has value My city"
}
ok: [localhost] => (item={'key': 'address.street', 'value': 'My street'}) => {
    "msg": "address.street has value My street"
}
ok: [localhost] => (item={'key': 'address.number', 'value': 1}) => {
    "msg": "address.number has value 1"
}

PLAY RECAP *********************************************************************************************************************************************************************
localhost                  : ok=1    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

Here is the code of to_path. It is a python dict. Therefore, by using paths[item]

- name: "Playing with Ansible"
  hosts: localhost
  tasks:
    - name: "Reading yaml file"
      ansible.builtin.shell: "cat input.yaml"
      register: input_yaml_content

    - name: "Parse yaml into variable"
      set_fact:
        my_yaml: "{{ input_yaml_content.stdout | from_yaml }}"

    - name: "Finding all paths"
      set_fact:
        paths: "{{ my_yaml | ansible.utils.to_paths }}"

    - name: "Printing key-values"
      debug:
        msg: "Key: {{ item }}, value: {{ paths[item] }}"
      with_items: "{{ paths }}"

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