I want to use the n values in the next for statement and I expect output as router_0, router_1. But any optisons like router_[n], router_{{ n }}, router_(n) etc didnt work. How can we do this?
{% for n in range(0, 2) %}
{% for rtr in web.router_[n] %}
{% if rtr.interface.type == 'lacp' %}
interface Port-Channel{{ rtr.interface.id }}
.
{% endif %}
{% endfor %}
{% endfor %}
In vars.yaml, there are variables for paired routers, router_0 and router_1. I want to generate the config template for both routers at the same time.
Thanks,
Concatenate the name of the attribute
{% for rtr in web['router_' ~ n] %}
Related
I have the below jinja code to conditionally concatenate strings depending on two variables. Whilst it (probably) works it looks unwieldy, but I'd have thought this was a common thing to do when rendering.
{% if item.route %}
{% if item.route_follow and item.route_external %} {% set route_rel = 'external' %}
{% elif not item.route_follow and not item.route_external %} {% set route_rel = 'nofollow' %}
{% elif not item.route_follow and item.route_external %} {% set route_rel = 'nofollow external' %}
{% else %} {% set route_rel = '' %}
{% endif %}
{% endif %}
Is there a better way, maybe a one-liner?
When I got to the end of this I realised the answer:
{% if item.route %}
{% set route_rel = ['' if item.route_follow else 'nofollow', 'external' if item.route_external else '']|reject('==','')|join(' ') %}
{% endif %}
Sometimes, you just have to look at it again...
I want made loop like of this on twig template:
for($i=1;$i<100;$i++) {
echo $i;
}
I solved this problem as:
{% if k > 0 %}
{% for i in 0..k - 1 %}
<div></div>
{% endfor %}
{% endif %}
if k = 0 -> no loop
if k = 1 -> 1 loop
if k = 100 -> 100 lopp
May be is other solve?
You can use range to reproduce loop output similar to the first php example
{% for i in range(1, 100-1) %}
{{ i }}
{% endfor %}
You can add the if inside the loop
{% for i in 0..k if k > 0 %}
{{ i }}
{% endfor %}
demo
edit: This doesn't work anymore in twig 3.X. You have to place the if inside the codeblock
This question already has an answer here:
Pushing items to a var while looping over another var in Ansible Jinja2 template
(1 answer)
Closed 4 years ago.
I'm trying to calculate the needed space based on the longest word in a dictionary.
It seems though that the variable num doesn't transfer it's value to the second inner loop.
I'm basically trying to caculate the amount of spaces to align the columns correctly.
{% for module in modules %}
module "{{ module.name }}" {
source = "{{ module.source }}"
{% set num = 1 %}
{% for n in module.vars.keys() %}
{% if num < n|length %}
{% set num = n|length %}
{% endif %}
{{ num }}: {{ n }}
{% endfor %}
{% for m in module.vars %}
{{ num }}
{{ m }} {{ '= "' + module.vars[m]|indent(width=num) }}"
{% endfor %}
}
You're right, you can't get variables out of loops this way. See "Scoping behavior" in the docs.
One option is to use what they suggest and create a namespace:
{% set ns = namespace(num=0) %}
{% for n in module.vars.keys() %}
{% if ns.num < n|length %}
{% set ns.num = n|length %}
{% endif %}
{{ ns.num }}: {{ n }}
{% endfor %}
In your case, there is an easier and cleaner solution though: you can calculate the maximum width in an expression. Use map() to get a list of lengths, and use max filter to get the biggest one:
{% set indent_width = module.vars.keys() | map("length") | max %}
{% for m in module.vars %}
{{ m }} {{ '= "' + module.vars[m]|indent(width=indent_width) }}"
{% endfor %}
Hello and thanks for reading my post!
I have a collection with multiple products. On a custom collection template, I want to show the tags only for those that contain multiple products (or when more than 1 product in that collection have the same tag)
I assume it would go something like:
{% for tag in collection.all_tags %}
{% if tag.product.size >= 1 %}
has more than 1 product.
{% endif %}
{% endfor %}
I've answered similar questions here and here.
You want something like this:
{% for tag in collection.all_tags %}
{% assign products_count = 0 %}
{% for product in collection.products %}
{% if product.tags contains tag %}
{% assign products_count = products_count | plus: 1 %}
{% endif %}
{% endfor %}
{% if products_count > 1 %}
{{ tag }}
{% endif %}
{% endfor %}
I was wondering what is the proper way of finding the index of an item in an array is in a Liquid template, and selected related items based off of the index. Currently I'm able to calculate the value, but it seems to be a string and I can't then find other items in the array with the string. For example in a CMS:
{% for site_page in site.pages.all %}
{% if site_page.id == page.id %}
{% assign page_index = forloop.index0 %}
{% capture previous_page_index %}
{{ page_index | minus: 1 }}
{% endcapture %}
{% break %}
{% endif %}
{% endfor %}
The expected value can be found in previous_page_index (in this case 0) however, if i try to do something like site.pages.all[previous_page_index] I receive no output. If I do the same thing with a hardcoded index value: site.pages.all[0] it does yield an output. Does anyone have an idea/example on how this is supposed to be done in liquid?
Best I can figure is to use {% for item in array limit:1 offset:forloop.index0 %}. For example:
require 'liquid'
chars = %w[a b c]
names = %w[alpha bravo charlie]
puts Liquid::Template.parse(<<DONE).render( 'chars'=>chars, 'names'=>names )
{% for c in chars %}
{{c}} is
{% for n in names limit:1 offset:forloop.index0 %}{{n}}{% endfor %}
{% endfor %}
DONE
…which produces…
a is
alpha
b is
bravo
c is
charlie
Editorial aside: ouch. What an ugly tempting language. I understand its goals, but the burden it places on users is heinous.