How to filter dictionaries in Jinja?

Question

I have a package dictionary with the package name being the key, and some details dictionary is the value:

{
        "php7.1-readline": {
            "latest": "7.1.9-1+ubuntu14.04.1+deb.sury.org+1", 
            "origins": [
                "ppa.launchpad.net"
            ], 
            "version": "7.1.6-2~ubuntu14.04.1+deb.sury.org+1", 
            "www": "http://www.php.net/"
        }, 
        "php7.1-xml": {
            "latest": "7.1.9-1+ubuntu14.04.1+deb.sury.org+1", 
            "origins": [
                "ppa.launchpad.net"
            ], 
            "version": "7.1.6-2~ubuntu14.04.1+deb.sury.org+1", 
            "www": "http://www.php.net/"
        }, 
        "plymouth": {
            "version": "0.8.8-0ubuntu17.1"
        },
    ....
}

I would like to reduce the above to a dictionary only with packages that have an attribute latestin their meanings.

It would seem that json_querythis is a filter, but I can not understand the syntax. The examples there all seem to work on dictionary lists, not dictionaries of the same ...

For example, if I “plug” the specified dictionary into json_query('*.latest'), I get a list of the latest latest versions:

[
  "7.1.9-1+ubuntu14.04.1+deb.sury.org+1",
  "7.1.9-1+ubuntu14.04.1+deb.sury.org+1",
  "7.1.6-2~ubuntu14.04.1+deb.sury.org+1"
]

How can I get all the dictionary elements instead?

Any hope?

Answer 1

, fooobar.com/questions/1013958/....

json_query ( Ansible 2.4.0).

json_query.py, jq-like to_entries/from_entries. ./filter_plugins :

- debug:
    msg: "{{ pkg | json_query('to_entries(@) | [?value.latest].{key:key, value:value.latest} | from_entries(@)')}}"

:

"msg": {
    "php7.1-readline": "7.1.9-1+ubuntu14.04.1+deb.sury.org+1",
    "php7.1-xml": "7.1.9-1+ubuntu14.04.1+deb.sury.org+1"
}

PR , .

Answer 2

( ) Jinja, , Ansible. with_dict :

- hosts: localhost                                                              
  vars:                                                                         
    packages: {                                                                 
        "php7.1-readline": {                                                    
          "latest": "7.1.9-1+ubuntu14.04.1+deb.sury.org+1",                     
          "origins": [                                                          
            "ppa.launchpad.net"                                                 
          ],                                                                    
          "version": "7.1.6-2~ubuntu14.04.1+deb.sury.org+1",                    
          "www": "http://www.php.net/"                                          
        },                                                                      
        "php7.1-xml": {                                                         
          "latest": "7.1.9-1+ubuntu14.04.1+deb.sury.org+1",                     
          "origins": [                                                          
            "ppa.launchpad.net"                                                 
          ],                                                                    
          "version": "7.1.6-2~ubuntu14.04.1+deb.sury.org+1",                    
          "www": "http://www.php.net/"                                          
        },                                                                      
        "plymouth": {                                                           
          "version": "0.8.8-0ubuntu17.1"                                        
        }                                                                       
      }                                                                         

  tasks:                                                                        
    - set_fact:                                                                 
        new_packages: >                                                         
          {{ new_packages|default({})|                                          
                combine({item.key: item.value}) }}                              
      with_dict: "{{ packages }}"                                               
      when: "{{ item.value.latest is defined }}"                                

    - debug:                                                                    
        var: new_packages