Fix Django 6.0 pagination error in jazzmin admin template

[Copilot]

Django 6.0 changed format_html() to require formatting arguments. The jazzmin package (v3.0.1) calls format_html(html_str) without arguments, causing TypeError: args or kwargs must be provided on admin list views with pagination.

Changes

• fix_jazzmin.sh: Automated patch script that replaces format_html(html_str) with mark_safe(html_str) in jazzmin's jazzmin_paginator_number template tag (line 256)
• JAZZMIN_FIX_README.md: Documentation explaining the patch, deployment instructions, and why template tag override approaches don't work
• core/tests_jazzmin_templatetag.py: Unit tests verifying the patched template tag works without errors

Implementation

The patch modifies the installed jazzmin package:

# Before (Django 6.0 incompatible)
return format_html(html_str)

# After (Django 6.0 compatible)
return mark_safe(html_str)

mark_safe() is appropriate here because the HTML is pre-formatted from Django's trusted ChangeList object. The patch must be reapplied after reinstalling/upgrading jazzmin until an official fix is released.

Run as part of deployment:

pip install -r requirements.txt
./fix_jazzmin.sh

Original prompt

---

This section details on the original issue you should resolve

<issue_title>/jazzmin/templates/admin/pagination.html, error at line 26</issue_title>
<issue_description>Environment:

Request Method: GET
Request URL: https://fi.angermeier.net/admin/core/booking/

Django Version: 6.0
Python Version: 3.12.12
Installed Applications:
['core',
'jazzmin',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'trading']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware']

Template error:
In template /opt/Finoa/.venv/lib/python3.12/site-packages/jazzmin/templates/admin/pagination.html, error at line 26
args or kwargs must be provided.
16 : {% if cl.formset and cl.result_count %}
17 :
18 : {% endif %}
19 :
20 :
21 :
22 :

23 :

24 : {% if pagination_required %}
25 : {% for i in page_range %}
26 : {% jazzmin_paginator_number cl i %}
27 : {% endfor %}
28 : {% endif %}
29 :

30 :

31 :

Traceback (most recent call last):
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/core/handlers/exception.py", line 55, in inner
response = get_response(request)
^^^^^^^^^^^^^^^^^^^^^
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/core/handlers/base.py", line 221, in _get_response
response = response.render()
^^^^^^^^^^^^^^^^^
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/template/response.py", line 114, in render
self.content = self.rendered_content
^^^^^^^^^^^^^^^^^^^^^
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/template/response.py", line 92, in rendered_content
return template.render(context, self._request)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/template/backends/django.py", line 107, in render
return self.template.render(context)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/template/base.py", line 174, in render
return self._render(context)
^^^^^^^^^^^^^^^^^^^^^
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/template/base.py", line 166, in _render
return self.nodelist.render(context)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/template/base.py", line 1091, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/template/base.py", line 1052, in render_annotated
return self.render(context)
^^^^^^^^^^^^^^^^^^^^
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/template/loader_tags.py", line 160, in render
return compiled_parent._render(context)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/template/base.py", line 166, in _render
return self.nodelist.render(context)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/template/base.py", line 1091, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/template/base.py", line 1052, in render_annotated
return self.render(context)
^^^^^^^^^^^^^^^^^^^^
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/template/loader_tags.py", line 160, in render
return compiled_parent._render(context)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/template/base.py", line 166, in _render
return self.nodelist.render(context)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/template/base.py", line 1091, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/Finoa/.venv/lib/python3.12/site-packages/django/template/base.py", line 1052, in render_annotated
return self.render(context)
...

• Fixes /jazzmin/templates/admin/pagination.html, error at line 26 #349

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