[ansible-project] Ansible variables jinja and facts

[Dennis H]

So it’s confusing between all the rules on these three is there a good resource 
to go over this? Or maybe someone willing to help me this weekend figure out 
when you use quotes when you don’t and when you’re able to use variables. For 
example I attempted to do when: name.username == bob I’m having errors. Which I 
have an vars_files which contains a var array name: - username: bob. 

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[ansible-project] Issues with an jinja and magic variables script any help would be awesome

[Dennis H]

So I'm trying to combine magic variables and jinja. Unfortnately I'm running 
into issues. So This is the jinja script

{% for host in groups['all'] %}

{{ 
hostvars[host]['ansible_facts']['devices']['sda']['partitions']['sda1']['size'] 
}}

{% endfor %}

I run into this error 

"AnsibleUndefinedVariable: 'dict object' has no attribute 'devices'" }

This works when I target a group with one managed host but not one with 
multiple managedhosts. I have tried with hostvars['host'] and no luck...

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