community.general.json_query filter – Select a single element or a data subset from a complex data structure

Note

This filter plugin is part of the community.general collection (version 8.3.0).

You might already have this collection installed if you are using the ansible package. It is not included in ansible-core. To check whether it is installed, run ansible-galaxy collection list.

To install it, use: ansible-galaxy collection install community.general. You need further requirements to be able to use this filter plugin, see Requirements for details.

To use it in a playbook, specify: community.general.json_query.

Synopsis

  • This filter lets you query a complex JSON structure and iterate over it using a loop structure.

Requirements

The below requirements are needed on the local controller node that executes this filter.

  • jmespath

Input

This describes the input of the filter, the value before | community.general.json_query.

Parameter

Comments

Input

any / required

The JSON data to query.

Positional parameters

This describes positional parameters of the filter. These are the values positional1, positional2 and so on in the following example: input | community.general.json_query(positional1, positional2, ...)

Parameter

Comments

expr

string / required

The query expression.

See http://jmespath.org/examples.html for examples.

Examples

- name: Define data to work on in the examples below
  ansible.builtin.set_fact:
    domain_definition:
      domain:
        cluster:
          - name: cluster1
          - name: cluster2
        server:
          - name: server11
            cluster: cluster1
            port: '8080'
          - name: server12
            cluster: cluster1
            port: '8090'
          - name: server21
            cluster: cluster2
            port: '9080'
          - name: server22
            cluster: cluster2
            port: '9090'
        library:
          - name: lib1
            target: cluster1
          - name: lib2
            target: cluster2

- name: Display all cluster names
  ansible.builtin.debug:
    var: item
  loop: "{{ domain_definition | community.general.json_query('domain.cluster[*].name') }}"

- name: Display all server names
  ansible.builtin.debug:
    var: item
  loop: "{{ domain_definition | community.general.json_query('domain.server[*].name') }}"

- name: Display all ports from cluster1
  ansible.builtin.debug:
    var: item
  loop: "{{ domain_definition | community.general.json_query(server_name_cluster1_query) }}"
  vars:
    server_name_cluster1_query: "domain.server[?cluster=='cluster1'].port"

- name: Display all ports from cluster1 as a string
  ansible.builtin.debug:
    msg: "{{ domain_definition | community.general.json_query('domain.server[?cluster==`cluster1`].port') | join(', ') }}"

- name: Display all ports from cluster1
  ansible.builtin.debug:
    var: item
  loop: "{{ domain_definition | community.general.json_query('domain.server[?cluster==''cluster1''].port') }}"

- name: Display all server ports and names from cluster1
  ansible.builtin.debug:
    var: item
  loop: "{{ domain_definition | community.general.json_query(server_name_cluster1_query) }}"
  vars:
    server_name_cluster1_query: "domain.server[?cluster=='cluster2'].{name: name, port: port}"

- name: Display all ports from cluster1
  ansible.builtin.debug:
    msg: "{{ domain_definition | to_json | from_json | community.general.json_query(server_name_query) }}"
  vars:
    server_name_query: "domain.server[?starts_with(name,'server1')].port"

- name: Display all ports from cluster1
  ansible.builtin.debug:
    msg: "{{ domain_definition | to_json | from_json | community.general.json_query(server_name_query) }}"
  vars:
    server_name_query: "domain.server[?contains(name,'server1')].port"

Return Value

Key

Description

Return value

any

The result of the query.

Returned: success

Hint

Configuration entries for each entry type have a low to high priority order. For example, a variable that is lower in the list will override a variable that is higher up.