[Django] Options block in Template

README.md

Add the possibility to save options to the current context.

Save the different files in the proper folders:

DJANGO_PROJECT
  APP_NAME
    templates
      APP_NAME
        index.html
    templatetags
      options.py
    views.py

index.html

{% load options %}

{% options btn_opt %}
  {
    "class": [
      "btn",
      "btn-primary",
      "btn-options"
    ],
    "text": "{{ button_text }}",
    "type": "button"
  }
{% endoptions %}

<button type="{{ btn_opt.type }}" class="{{ btn_opt.class|join:' ' }}">{{ btn_opt.text }}</button>

options.py

from django import template

import json

register = template.Library()


class OptionNode(template.Node):

    def __init__(self, option_name, nodelist):
        self.option_name = option_name
        self.nodelist = nodelist

    def render(self, context):
        node_content = self.nodelist.render(context)
        context[self.option_name] = json.loads(node_content)
        return ''


@register.tag
def options(parser, token):
    option_name = token.split_contents()[-1]

    nodelist = parser.parse(('endoptions',))
    parser.delete_first_token()

    return OptionNode(option_name, nodelist)

views.py

from django.shortcuts import render


def index(request):
    context = {
        'button_text': "List all"
    }
    return render(request, 'APP_NAME/index.html', context=context)