Ansible Filters and variables

ansible-fruits-readme.MD

A simple example of creating a list from a dictionary var using Jinja filters in an ansible play task. see article: http://www.blue-bag.com/blog/ansible-filters-taming-lists-part-1

fruits.yml

---

- hosts: localhost
  gather_facts: false

  vars:
   
    images_to_update:
      - { name: "oranges-001.jpg", type: "Citrus"}
      - { name: "oranges-002.jpg", type: "Citrus"}
      - { name: "apples-001.jpg", type: "Non-citrus"}
      - { name: "bananas-001.jpg", type: "Non-citrus"}
      - { name: "grapes-001.jpg", type: "Non-citrus"}
      - { name: "grapefruit-001.jpg", type: "Citrus"}
      - { name: "pears-001.jpg", type: "Non-citrus"}
  
  tasks:

    - debug: msg="images_to_update {{ item.name }}"
      with_items: images_to_update
      
    - name: Setfact for archives to drop
      set_fact:
        fruit_archives_to_drop: "{{images_to_update|map(attribute='type')|list|unique }}"
    
    - debug: msg="{{ fruit_archives_to_drop }}"
    
    - debug: msg="{{ item }}"
      with_items: fruit_archives_to_drop

play-output.yml

PLAY [localhost] ************************************************************** 
TASK: [debug msg="images_to_update {{ item.name }}"] ************************** 

ok: [localhost] => (item={'type': 'Citrus', 'name': 'oranges-001.jpg'}) => {
    "item": {
        "name": "oranges-001.jpg", 
        "type": "Citrus"
    }, 
    "msg": "images_to_update oranges-001.jpg"
}

ok: [localhost] => (item={'type': 'Citrus', 'name': 'oranges-002.jpg'}) => {
    "item": {
        "name": "oranges-002.jpg", 
        "type": "Citrus"
    }, 
    "msg": "images_to_update oranges-002.jpg"
}

ok: [localhost] => (item={'type': 'Non-citrus', 'name': 'apples-001.jpg'}) => {
    "item": {
        "name": "apples-001.jpg", 
        "type": "Non-citrus"
    }, 
    "msg": "images_to_update apples-001.jpg"
}

ok: [localhost] => (item={'type': 'Non-citrus', 'name': 'bananas-001.jpg'}) => {
    "item": {
        "name": "bananas-001.jpg", 
        "type": "Non-citrus"
    }, 
    "msg": "images_to_update bananas-001.jpg"
}

ok: [localhost] => (item={'type': 'Non-citrus', 'name': 'grapes-001.jpg'}) => {
    "item": {
        "name": "grapes-001.jpg", 
        "type": "Non-citrus"
    }, 
    "msg": "images_to_update grapes-001.jpg"
}

ok: [localhost] => (item={'type': 'Citrus', 'name': 'grapefruit-001.jpg'}) => {
    "item": {
        "name": "grapefruit-001.jpg", 
        "type": "Citrus"
    }, 
    "msg": "images_to_update grapefruit-001.jpg"
}

ok: [localhost] => (item={'type': 'Non-citrus', 'name': 'pears-001.jpg'}) => {
    "item": {
        "name": "pears-001.jpg", 
        "type": "Non-citrus"
    }, 
    "msg": "images_to_update pears-001.jpg"
}

TASK: [Setfact for archives to drop] ****************************************** 
ok: [localhost]

TASK: [debug msg="{{ fruit_archives_to_drop }}"] ************************************ 
ok: [localhost] => {
    "msg": "['Citrus', 'Non-citrus']"
}

TASK: [debug msg="{{ item }}"] ************************************************ 
ok: [localhost] => (item=Citrus) => {
    "item": "Citrus", 
    "msg": "Citrus"
}
ok: [localhost] => (item=Non-citrus) => {
    "item": "Non-citrus", 
    "msg": "Non-citrus"
}