ansible invoke variable forming from first variable file and string and listed in second variables file

[Rizzy Savage]

We have two variable files, the first files carries constant and the second variables from the output generated.

firstfile.yml

    ---

    prefix: test

secondfile.yml

    ---

    test_variable: 12345

In we are want to call test_variable, but the formation of the variable should be concatenation from firstfile.yml and not `"{{ test_variable }}"`

Example:

    - hosts: localhost

      connection: local

      

      vars: 

      

        constants: firstfile.yml

        variables: seconfile.yml

      

      vars_files:

         

        - [ "{{ constants }}, {{ variables }}"

    

      tasks:

        name: test_name

        field: "{{ prefix }}_variable"

Error: `'test_variable' does not exist</Message></Error></Errors>`