Ansible：在 json_query 过滤器中传递一个变量

Question

I need to pass a variable in a json_query filter.

This example, with a fixed string, is working correctly (string=tutu) :

- set_fact:
 my_value_exist: "{{ my_json.json | json_query('contains(component.name,`tutu`)')}}"

But i need to pass a variable , instead of tutu

- set_fact:
 my_value_exist: "{{ my_json.json | json_query('contains(component.name,`{{my_var}}`)')}}"

{{my_var}} is a string retreived in a previous step

Do you have the correct syntax, so that the variable {{my_var}} could be passed correctly in parameter ?

Thanks for your help.

Regards,

Answer 1

Use helper variable for a task:

- set_fact:
    my_value_exist: "{{ my_json.json | json_query(qry) }}"
  vars:
    qry: 'contains(component.name,`{{my_var}}`'

Answer 2

If you would like to avoid using a helper var you can use the second var directly by wrapping it in escaped double quotes ( \\" ) between plus characters ( + ) like this:

- set_fact:
    my_value_exist: "{{ my_json.json | json_query('contains(component.name,`\" + my_var + \"`)') }}"

I know that this is a old question but it might help someone since this is the top result on the subject on google.