Playbook error "list object has no attribute" (vars, lists, dictionaries)

[Rob Dumas]

I'm trying to set up a few users on a Linux box using Ansible and I keep running into a weird error. First, here's the playbook:

---

- name: common/users | ensure presence, gid of default group

  group: 

    name: "{{ default_group.name }}"

    gid: "{{ default_group.gid }}"

    state: present

- name: common/users | ensure presence, sudo privileges of admin users

  user:

    name: "{{ default_users.username }}"

    uid: "{{ default_users.uid }}"

    group: "{{ default_group.name }}"

    groups: sudo

    state: present

and here's the `group_vars/all` file:

---

default_group: 

  gid: 2000

  name: groupname

default_users: 

  - username: user1

    uid: 2001

  - username: user2

    uid: 2002

However, when I run the playbook, I get the following error:

fatal: [vm-server]: FAILED! => {"failed": true, "msg": "the field 'args' has an invalid value, which appears
to include a variable that is undefined. The error was: 'list object' has no attribute 'username'

The error appears to have been in '/vagrant/roles/common/tasks/users.yml': line 8, column 3, but may
be elsewhere in the file depending on the exact syntax problem.

The offending line appears to be:

- name: common/users | ensure presence, sudo privileges of admin users
  ^ here"}

My list object "default_users" is supposed to set up two users and each one definitely contains the attribute "username", so why is it refusing to create the users and giving me this error? My YAML seems to follow the syntax and it passes YAMLlint with no problem.

[Matt Martz]

default_users is a list, you need to loop over it.  Look into with_items

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Matt Martz
@sivel
sivel.net

[Rob Dumas]

So I can't loop over variables like this?

[Matt Martz]

Like what?  You aren't looping anything in those tasks you showed.  You'll need to use with_items to actually do a loop.

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