Print only one item in list in ansible - ansible

Question

I have a variable that contains a list
- debug:
var: plugin_versions
Output
ok: [localhost] => {
"plugin_versions": [
{
"name": "ace-editor",
"version": "1.1"
},
{
"name": "analysis-core",
"version": "1.95"
},
{
"name": "ant",
"version": "1.9"
}
]
Now I want to print out only the name
What Ive tried is
- debug:
var: plugin_versions.name
- debug:
var: plugin_versions[name]
But in both cases I get
TASK [plugins : debug] ***************************************************************************************************************
ok: [localhost] => {
"plugin_versions.name": "VARIABLE IS NOT DEFINED!"
}
TASK [plugins : debug] ***************************************************************************************************************
ok: [localhost] => {
"plugin_versions[name]": "VARIABLE IS NOT DEFINED!"
}
Im kinda clueless what else can I do here to print out the name only.

Answer 1

you could do it in a few ways. The plugin_versions is a list of dictionaries, you can print the name attribute of each dictionary using loops, here are 2 loop examples you could use:
---
- hosts: localhost
gather_facts: false
vars:
plugin_versions:
- name: ace-editor
version: '1.1'
- name: analysis-core
version: '1.95'
- name: ant
version: '1.9'
tasks:
- name: print variable - with_items
debug:
msg: "{{ item.name }}"
with_items:
- "{{ plugin_versions }}"
- name: print variable - with map filter
debug:
var: item
with_items:
- "{{ plugin_versions | map(attribute='name') | list }}"
output:
[http_offline#greenhat-29 tests]$ ansible-playbook -i hosts test.yml
PLAY [localhost] *******************************************************************************************************************************************************************************************************
TASK [print variable - with_items] *************************************************************************************************************************************************************************************
ok: [localhost] => (item={'name': 'ace-editor', 'version': '1.1'}) => {
"msg": "ace-editor"
}
ok: [localhost] => (item={'name': 'analysis-core', 'version': '1.95'}) => {
"msg": "analysis-core"
}
ok: [localhost] => (item={'name': 'ant', 'version': '1.9'}) => {
"msg": "ant"
}
TASK [print variable - with map filter] ********************************************************************************************************************************************************************************
ok: [localhost] => (item=ace-editor) => {
"item": "ace-editor"
}
ok: [localhost] => (item=analysis-core) => {
"item": "analysis-core"
}
ok: [localhost] => (item=ant) => {
"item": "ant"
}
PLAY RECAP *************************************************************************************************************************************************************************************************************
localhost : ok=2 changed=0 unreachable=0 failed=0
[http_offline#greenhat-29 tests]$
hope it helps

Answer 2

Since you have a list (plugin_versions) you'll need to access each element by index:
---
- hosts: all
vars:
plugin_versions:
- { name: "ace-editor", version: "1.1"}
- { name: "analysis-core", version: "1.95"}
- { name: "ant", version: "1.9"}
tasks:
- debug: var=plugin_versions[0].name
also, if you want to loop through all the items in the list you can do something like this:
- debug: "var=item['name']"
with_items: "{{ plugin_versions }}"

Answer 3

You can iterate over the items of your variable with:
- debug:
var: item.name
with_items: "{{plugin_versions}}"