# Jinja2 for loop in templates **URL:** \ **Category:** Ansible Project\ **Tags:** ubuntu\ **Created:** [November 30, 2012, 10:42am UTC](https://forum.ansible.com/t/jinja2-for-loop-in-templates/12113 "2012-11-30T10:42:23Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Mark\_Maas](https://avatars.discourse-cdn.com/v4/letter/m/7c8e57/32.png) [@Mark\_Maas](https://forum.ansible.com/u/Mark_Maas)\ **Post date:** [November 30, 2012, 10:42am UTC](https://forum.ansible.com/t/jinja2-for-loop-in-templates/12113/1 "2012-11-30T10:42:23Z")
Hi List, I’m currently trying to roll out a default /etc/apt/sources.list and add “deb” lines to it for specific hosts. The template sources.j2 looks like this: > ############################################################# > > ################### OFFICIAL UBUNTU REPOS ################### > > ############################################################# > > ###### Ubuntu Main Repos > > deb [http://nl.archive.ubuntu.com/ubuntu/](http://nl.archive.ubuntu.com/ubuntu/) {{ ansible\_distribution\_release }} main restricted universe multiverse > > ###### Ubuntu Update Repos > > deb [http://nl.archive.ubuntu.com/ubuntu/](http://nl.archive.ubuntu.com/ubuntu/) {{ ansible\_distribution\_release }}-security main restricted universe multiverse > > deb [http://nl.archive.ubuntu.com/ubuntu/](http://nl.archive.ubuntu.com/ubuntu/) {{ ansible\_distribution\_release }}-updates main restricted universe multiverse > > ###### Ubuntu Partner Repo > > deb [http://archive.canonical.com/ubuntu](http://archive.canonical.com/ubuntu) {{ ansible\_distribution\_release }} partner > > deb-src [http://archive.canonical.com/ubuntu](http://archive.canonical.com/ubuntu) {{ ansible\_distribution\_release }} partner > > ###### Ubuntu Opsview Repo > > deb [https://XXXXXX:XXXXXXXX@downloads.opsview.com/opsview-commercial/latest/apt](https://XXXXXX:XXXXXXXX@downloads.opsview.com/opsview-commercial/latest/apt) {{ ansible\_distribution\_release }} main > > {% for item in extra-apt-lines %} > > {{ item }} > > {% endfor %} And one of the host\_vars has this added to it: > * * * > > extra-apt-lines: > > - deb [http://oss.oracle.com/debian](http://oss.oracle.com/debian) unstable main non-free The task itself, ofcourse: > * * * > > - name: APT | Kopieer apt-sources config > > action: template src=~/playbooks/templates/sources.j2 dest=/etc/apt/sources.list owner=root group=root mode=0644 > > notify: > > - reload apt > > tags: > > - apt When I run this, I get this error message: > fatal: [xmgtansible] =\> {‘msg’: “unsupported operand type(s) for -: ‘Undefined’ and ‘Undefined’”, ‘failed’: True} I’m trying to base this of: [http://jinja.pocoo.org/docs/templates/](http://jinja.pocoo.org/docs/templates/) Any suggestions? Thanks! Mark ---
**Author:** ![Daniel\_Hokka\_Zakriss](https://avatars.discourse-cdn.com/v4/letter/d/f05b48/32.png) [@Daniel\_Hokka\_Zakriss](https://forum.ansible.com/u/Daniel_Hokka_Zakriss)\ **Post date:** [November 30, 2012, 10:48am UTC](https://forum.ansible.com/t/jinja2-for-loop-in-templates/12113/2 "2012-11-30T10:48:01Z")
Hi, Mark Maas wrote: > Hi List, > > I'm currently trying to roll out a default /etc/apt/sources.list and add > "deb" lines to it for specific hosts. > > The template sources.j2 looks like this: > > \ > {% for item in extra-apt-lines %} You can't have - in variable names. It's an operator. Name it extra\_apt\_lines or something instead, and things should be fine. ---
**Author:** ![Mark\_Maas](https://avatars.discourse-cdn.com/v4/letter/m/7c8e57/32.png) [@Mark\_Maas](https://forum.ansible.com/u/Mark_Maas)\ **Post date:** [November 30, 2012, 11:00am UTC](https://forum.ansible.com/t/jinja2-for-loop-in-templates/12113/3 "2012-11-30T11:00:53Z")
Oh my. That simple a fix huh? Thanks! Good catch! ---
**Author:** ![Arie\_Skliarouk](https://avatars.discourse-cdn.com/v4/letter/a/edb3f5/32.png) [@Arie\_Skliarouk](https://forum.ansible.com/u/Arie_Skliarouk)\ **Post date:** [December 4, 2012, 7:52pm UTC](https://forum.ansible.com/t/jinja2-for-loop-in-templates/12113/4 "2012-12-04T19:52:56Z")
> > The template sources.j2 looks like this: > > {% for item in extra-apt-lines %} > > You can’t have - in variable names. It’s an operator. Name it > extra\_apt\_lines or something instead, and things should be fine. Sorry for hijacking the thread, but looks like it already have been resolved… On one of my machines I have bonded network interface that happens to be named “main-net0”. Yes, with a dash in the middle. Now, one of my templates requires IP number of the interface. This means to get the IP I need to address ansible\_main-net2.ipv4.address variable. And this causes the same “unsupported operand type” error. How can I workaround the problem? ---
**Author:** ![Michael\_DeHaan](https://avatars.discourse-cdn.com/v4/letter/m/c4cdca/32.png) [@Michael\_DeHaan](https://forum.ansible.com/u/Michael_DeHaan)\ **Post date:** [December 4, 2012, 8:35pm UTC](https://forum.ansible.com/t/jinja2-for-loop-in-templates/12113/5 "2012-12-04T20:35:42Z")
You can't have those in variable names, and it's a little weird to do with Ansible's shorthand templating, but nothing wrong with: {{ hostvars[$inventory\_hostname]["whatever variable name you want"]["some subkey"] }} Should work. Though IMHO the setup module should replace any "-" or "." with "\_" to simplify this problem. ---
**Author:** ![Arie\_Skliarouk](https://avatars.discourse-cdn.com/v4/letter/a/edb3f5/32.png) [@Arie\_Skliarouk](https://forum.ansible.com/u/Arie_Skliarouk)\ **Post date:** [December 10, 2012, 12:22pm UTC](https://forum.ansible.com/t/jinja2-for-loop-in-templates/12113/6 "2012-12-10T12:22:34Z")
{% set mainnet0\_ip = hostvars[inventory\_hostname][“ansible\_main-net0”][“ipv4”][“address”] %} worked perfectly, thank you!