If I have a list of users say ["Sam", "Bob", "Joe"], I want to do something where I can output in my jinja template file:
{% for user in userlist %}
<a href="/profile/{{ user }}/">{{ user }}</a>
{% if !loop.last %}
,
{% endif %}
{% endfor %}
I want to make the output template be:
Sam, Bob, Joe
I tried the above code to check if it was on the last iteration of the loop and if not, then don't insert a comma, but it does not work. How do I do this?
You want your if check to be:
{% if not loop.last %}
,
{% endif %}
Note that you can also shorten the code by using If Expression:
{{ ", " if not loop.last else "" }}
{{ "," if not forloop.last }}
{{ "," if not loop.last else "" }}
forloop instead of loop and {% instead of {{, like this: {% if not forloop.last %},{% endif %}. Other solutions did not work
{{ "" if loop.last else ", " }}You could also use the builtin join filter like this:
{{ users|join(', ') }}
ansible -i localhost, all -m debug -a "msg=\"{{ [ 'a','b','c' ]|join('X') }}\""And using the joiner from https://jinja.palletsprojects.com/templates/#joiner
{% set comma = joiner(",") %}
{% for user in userlist %}
{{ comma() }}<a href="/profile/{{ user }}/">{{ user }}</a>
{% endfor %}
It's made for this exact purpose. Normally a join or a check of forloop.last would suffice for a single list, but for multiple groups of things it's useful.
A more complex example on why you would use it.
{% set pipe = joiner("|") %}
{% if categories %} {{ pipe() }}
Categories: {{ categories|join(", ") }}
{% endif %}
{% if author %} {{ pipe() }}
Author: {{ author() }}
{% endif %}
{% if can_edit %} {{ pipe() }}
<a href="?action=edit">Edit</a>
{% endif %}
!as a negation operator. "not" is spelled "not".