Django: check for exact url in request using regex - django

Question

I need to check if the url is exactly:
http://127.0.0.1:8000/shop/
and based on this render a header.
If it is, for example:
http://127.0.0.1:8000/shop/stickers/stickers-por-hoja/medida-y-cantidad
Header shouldn't render.
I've read you can do something like this:
{% if "/shop/$" in request.path %}
{% include 'header.html' %}
{% endif %}
But this doesn't work. On the other hand this works, but is not what I need:
{% if "/shop/" in request.path %}
{% include 'header.html' %}
{% endif %}
So, Can I use regex in the if condition?

Answer 1

Create a context processor has_shop_in_url.py having this code below.
import re
def has_shop(request):
shop_in_request = your_regex_validation
return {
'has_shop_in_url': any([shop_in_request]) }
Add that context processor
TEMPLATES = [
{
.....
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
'your_module.has_shop_in_url.has_shop' # YOUR PROCESSOR
],
},
},
]
Now it is available for your whole web application. In template just write {{has_shop_in_url}}. Your can see True/False.

Answer 2

You could move the regex check into the view and add a field to the context for the template like so:
class MyView(View):
def action(self, request, *args, **kwargs):
shop_in_request = re.findall(r"/shop/$", request.path)
context = {"include_header": any(shop_in_request)}
return render(template, context)
Then in your view you could use:
{% if include_header %}
{% include 'header.html' %}
{% endif %}

Answer 3

Create a template tag to do that.
The url whitelisted must be somewhere in the settings. For example you can add something like this
HEADER_WHITELIST_URLS = (
'regex1',
'regex2',
)
2) Your template tags will check the current URL and if one of the regex matches, you can render your header. In a hypothetical version2, you can also add the header to show for a specific regex.
Use this snippet as starting point for your template tag
import datetime
from django import template
from django.conf import settings
register = template.Library()
#register.simple_tag(takes_context=True)
def render_header(context, format_string):
regexs = settings.HEADER_WHITELIST_URLS
# maybe you can add some try/exception if the settings is not available.
for regex in regexs:
# test the regex with the url in the context.
# if matches return the code to render the header and break
return None
Check here for more details about the template tags: https://docs.djangoproject.com/en/2.1/howto/custom-template-tags/#writing-custom-template-tags