ansible *when* say : "error while evaluating conditional" - ansible

Question

I try to do something like that:
I have this playbook
---
- hosts: all
vars:
user: myuser
venv_name: venv
only_deploy_code: "yes"
roles:
- my_venv
In roles/my_venv/tasks/main.yml::
---
- name: pip Install packages into virtualenv
pip: name={{ item }} virtualenv="{{ home }}/{{ venv_name }}" virtualenv_site_packages="yes"
with_items:
- PyYAML
- numexpr
sudo_user: "{{ user }}"
sudo: true
when: only_code_deploy == "no"
but I get this error::
TASK: [akd_venv | pip Install packages into virtualenv]
***********************
fatal: [vagrant] => error while evaluating conditional: only_code_deploy == "no"

Answer 1

Just try to omit the quotes around the yes and change your when statement like this:
- hosts: all
gather_facts: no
vars:
only_deploy_code: yes
tasks:
- debug:
msg: "This is yes message"
when: not only_deploy_code
Tested on the local machine like this:
ansible-playbook -i "localhost," test.yml -c local
with the output:
PLAY ***************************************************************************
TASK [debug] *******************************************************************
skipping: [localhost]
PLAY RECAP *********************************************************************
localhost : ok=0 changed=0 unreachable=0 failed=0
I think this is the expected behaviour that you want, just modified the when statement if you want to skip it for no instead of yes like this:
when: only_deploy_code