json - How to set templated key name in ansible also on second level? -

assuming have following variable definition in ansible:

users:   - username: root     password: "changeme"     services:       - mariadbroot   - username: mediawikiadmin     password: "changeme"     services:       - mediawikiadmin   - username: hanshuber     password: "changeme"     services:       - mediawikiuser 

this data not perfect accessing specific user. want rewrite data different format. rewriting users list, dictionary access user directly. illustrate this, example set only! root password above format:

- name: set root passwd   shell: echo "root:{{ item.password }}" | chpasswd   with_items:     - "{{ users }}"   when: "{{ item.username }} == 'root'" 

this not nice , gets more complicated when handling services list. purpose want rewrite users list dictionary, access root user directly follows:

- name: set root passwd   shell: echo "root:{{ users_byusername['root'] }}" | chpasswd 

this lot easier , easier understand.

the following not work:

- name: copy users users_byusername, access them directly username dict instead of list   set_fact:           { "users_byusername":                 { "{{ item.username }}":                         { password: "{{ item.password }}",                         username: "{{ item.username }}",                         services: [ "{{ item.services|list}}"]  }                 }           }   with_items:     - "{{ users }}" - name: debugprint users_byusername   ignore_errors: true   debug:     msg: "{{ users_byusername }}" 

results in:

task [orderusersvars : debugprint users_byusername] ****************************** ok: [wiki.meinesuperdomain.de] => {     "msg": {         "{{ item.username }}": {             "password": "changeme",             "services": [                 [                     "mediawikiuser"                 ]             ],             "username": "hanshuber"         }     } } 

as can see item.username not replaced properly.

on other hand, following work

without first hirachy seems work perfectly:

- name: copy users users_byusername, access them directly username dict instead of list   set_fact:                 { "{{ item.username }}":                         { password: "{{ item.password }}",                         username: "{{ item.username }}",                         services: [ "{{ item.services|list}}"]  }                 }   with_items:     - "{{ users }}" - name: debugprint root   ignore_errors: true   debug:     msg: "{{ root }}"  - name: debugprint mediawikiadmin   ignore_errors: true   debug:     msg: "{{ mediawikiadmin }}" 

and results in following:

task [orderusersvars : debugprint root] **************************************** ok: [wiki.meinesuperdomain.de] => {     "msg": {         "password": "changeme",         "services": [             [                 "mariadbroot"             ]         ],         "username": "root"     } }  task [orderusersvars : debugprint mediawikiadmin] ****************************** ok: [wiki.meinesuperdomain.de] => {     "msg": {         "password": "changeme",         "services": [             [                 "mediawikiadmin"             ]         ],         "username": "mediawikiadmin"     } } 

it feels missing tiny little bit of puzzle solve this. maybe can help?

i'm still not sure question about, seems want this:

- debug:     msg: "{{ users | selectattr('username', 'equalto', 'root') | map(attribute='password') | first }}"