django_manage createsuperuser does not seem idempotent

[ansibot]

From @westfood on 2016-06-05T18:53:40Z

ISSUE TYPE

• Bug Report

COMPONENT NAME

django_manage

ANSIBLE VERSION

ansible 2.0.0.2

OS / ENVIRONMENT

OSX El Captain / 10.11.5, managing CentOS 7.1

SUMMARY

Issuing command createsuperuser ends up in error after second invocation.

STEPS TO REPRODUCE

Using this task, hard coding username/mail does not yeald in better effect

- name: Django add superusers
  django_manage:
    app_path: "{{ seeder_home }}/Seeder"
    virtualenv: "{{ seeder_virtualenv }}"
    command: "createsuperuser --noinput --username={{ item.name }} --email={{ item.mail }}" # Not idempotent, probably bug in django_manage module
  with_items: "{{ seeder_admins }}"
  tags: django
  ignore_errors: yes

EXPECTED RESULTS

It should not try to create user again

ACTUAL RESULTS

stderr: Traceback (most recent call last):\n  File \"/opt/virtualenv/seeder/lib/python3.4/site-packages/django/db/backends/utils.py\", line 64, in execute\n    return self.cursor.execute(sql, params)\npsycopg2.IntegrityError: duplicate key value violates unique constraint \"auth_user_username_key\"\nDETAIL:       
Key (username)=(rudolf) already exists.

Copied from original issue: ansible/ansible-modules-core#3871

[ansibot]

From @ansibot on 2016-06-05T18:53:40Z

@tastychutney, @scottanderson42, ping. This issue is waiting on your response.
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[ansibot]

From @ambivalentno on 2016-06-05T18:53:40Z

as I've found this ticket while googling (and I'm working on this), here's a sample on how to create superuser in sort-of idempotent way:

- name: check if django superuser exists
  shell: 'echo "from django.contrib.auth.models import User; User.objects.filter(is_superuser=True).exists()" | {{project_dir}}/venv/bin/python manage.py shell'
  args:
    chdir: "{{ project_dir }}"
  register: superuser_exists


- name: create superuser if it doesnt exist
  when: superuser_exists.stdout.find("True") == -1
  django_manage:
    app_path: '{{django_app_path}}'
    settings: '{{django_settings|default(omit,true)}}'
    virtualenv: '{{django_virtualenv|default(omit,true)}}'
    command: "createsuperuser --noinput --username={{ bookiebet_admin_django_superuser_login }} --email={{ bookiebet_admin_django_superuser_email }}"

I have to note not all people will use default django's user model (django.contrib.auth.models.User). Therefore, sothing like settings.AUTH_USER_MODEL should be used.
Also, it's still not idempotent enough, as update of username, email and password don't process here.

UPDATE:
found a gist which does everything I've noted:
https://gist.github.com/elleryq/9c70e08b1b2cecc636d6

[next-jesusmanuelnavarro]

It is to be noted that as per ansible version 2.9.4, documentation still shows the failing createuser example.

It probably makes sense to update the doc entry.

[ansibot]

Thank you very much for your interest in Ansible. Ansible has migrated much of the content into separate repositories to allow for more rapid, independent development. We are closing this issue/PR because this content has been moved to one or more collection repositories.

• lib/ansible/modules/web_infrastructure/django_manage.py -> https://galaxy.ansible.com/community/general

For further information, please see:
https://github.com/ansible/ansibullbot/blob/master/docs/collection_migration.md