'dict' object has no attribute

[Brad V]

I'm a bit stumped here.

I have a playbook setup that uses hostvars to fill in expressions in other places including jinja2 templates.  Whenever one of those variables is an IP address, I get the error 'dict' object has no attribute 'xx.xx.xx.xx'. when there's a var set to that value.

For example,

/install/vars/main.yml

db_master_ip: "{{hostvars['hostname.localdomain'][ansible_eth0.ipv4.address]}}"

is used in a later step as 

/install/tasks/main.yml

- include: standby.yml

/install/tasks/standby.yml

shell: pg_basebackup -h {{db_master_ip}} -D {{postgres_data_dir}} -U {{db_user}} -v -x

Ansible fails on that step with the 'dict' object has no attribute error.  Though it shows the correct IP address in the error message

If I change it to 

shell: pg_basebackup -h {{hostvars['hostname.localdomain'][ansible_eth0.ipv4.address]}} 

It works just fine, but that's definitely less than ideal as I use the {{ db_master_ip }} expression in quite a few places and would like to be able to easily modify it.

Alternatively, if I change 

db_master_ip: 192.168.1.2 

it also works.

I know it's got to be something with the way jinja2 is parsing the dict, but I have no idea where it would be going wrong or what I can do to fix it.  I've been googling around for the last day and haven't really come up with anything that makes sense to my situation.

[Yassen Damyanov]

How about ansible_eth0.ipv4[0].address ? (note the zero index)

[Yassen Damyanov]

On Wednesday, June 17, 2015 at 4:52:27 PM UTC+3, Yassen Damyanov wrote:

How about ansible_eth0.ipv4[0].address ? (note the zero index)

My bad, this is OpenBSD specific (ansible_ifname.ipv4 is a list of dicts there). So just forget the above.
-Y.

[Brad V]

Anyone else stumbling upon this.

db_master_ip: "{{ hostvars['hostname.localdomain'].ansible_eth0.ipv4.address }}"  was the change that was needed.  

Thanks to piffey on the IRC channel for the assist.