jinja2 – Page 3 – Tarik Billa

Rendering Ansible template into the fact variable

December 3, 2023 by Tarik

I think you might be just looking for the template lookup plugin: – set_fact: rendered_template: “{{ lookup(‘template’, ‘./template.j2’) }}” Usage example: template.j2 Hello {{ value_for_template }} playbook.yml — – hosts: localhost gather_facts: no connection: local vars: value_for_template: world tasks: – debug: var: rendered_template vars: rendered_template: “{{ lookup(‘template’, ‘./template.j2’) }}” The result: TASK [debug] ******************************************************************* ok: … Read more

How do you index on a jinja template?

December 2, 2023 by Tarik

If you really want the index, you could just loop on one of the variables and then uses Jinja’s loop.index0 feature (returns the current index of the loop starting at 0 (loop.index does the same thing, starting at 1) For example: {% for item in list1 %} {{ item }} {{ list2[loop.index0] }} {{ list3[loop.index0] … Read more

Jinja convert string to integer

December 1, 2023 by Tarik

You need to cast string to int after regex’ing number: {% set number = get_host_number() | int %} And then there is no need in | int inside get_host_range macro.

casting ints to str in Jinja2

December 1, 2023 by Tarik

Jinja2 also defines the ~ operator, which automatically converts arguments to string first, as an alternative to the + operator. Example: {% set p = year ~ “https://stackoverflow.com/” ~ month ~ “https://stackoverflow.com/” ~ day ~ “https://stackoverflow.com/” ~ post.slug %} See Other operators or, if you really want to use str, modify the Environment.globals dictionary.

Jinja 2 safe keyword

November 27, 2023 by Tarik

The safe filter explicitly marks a string as “safe”, i.e., it should not be automatically-escaped if auto-escaping is enabled. The documentation on this filter is here. See the section on manual escaping to see which characters qualify for escaping.

What dashes mean in jinja templates?

October 10, 2023 by Tarik

Turns out that + and – are there for whitespace control purpose. You can manually disable the lstrip_blocks behavior by putting a plus sign (+) at the start of a block […] You can also strip whitespace in templates by hand. If you put an minus sign (-) to the start or end of an … Read more

Update and render a value from Flask periodically

September 23, 2023 by Tarik

Using an Ajax request Python @app.route(‘/_stuff’, methods= [‘GET’]) def stuff(): cpu=round(getCpuLoad()) ram=round(getVmem()) disk=round(getDisk()) return jsonify(cpu=cpu, ram=ram, disk=disk) Javascript function update_values() { $SCRIPT_ROOT = {{ request.script_root|tojson|safe }}; $.getJSON($SCRIPT_ROOT+”/_stuff”, function(data) { $(“#cpuload”).text(data.cpu+” %”) $(“#ram”).text(data.ram+” %”) $(“#disk”).text(data.disk+” %”) }); } Using Websockets project/app/views/request/websockets.py # -*- coding: utf-8 -*- # OS Imports import json # Local Imports from app … Read more

Why doesn’t my condition logic work as expected in Jinja2/CherryPy?

September 14, 2023 by Tarik

This part of documentation can help you: The special constants true, false and none are indeed lowercase. Because that caused confusion in the past, when writing True expands to an undefined variable that is considered false, all three of them can be written in title case too (True, False, and None). However for consistency (all … Read more

Returning rendered template with Flask-Restful shows HTML in browser

September 8, 2023 by Tarik

I modified the get accordingly. Setting the content type did the trick. from flask import render_template, make_response class AppointmentController(Resource): def __init__(self): pass def get(self): headers = {‘Content-Type’: ‘text/html’} return make_response(render_template(‘index.html’),200, headers)

How can I determine if a Jinja2 template block is empty?

August 31, 2023 by Tarik

Simply call the block: {% if self.foo() %} – {% endif %}