Introduce custom admin

This is the base for custom admin views (with admin design and permission checking)
Replace default admin site with custom admin site in AKModel
Use custom admin index template & apply first basic change
Introduce custom admin base template (including bootstrap loading)
Introduce Mixin for AdminViews

AKModel/apps.py

 from django.apps import AppConfig
+from django.contrib.admin.apps import AdminConfig
 
 
 class AkmodelConfig(AppConfig):
     name = 'AKModel'
+
+
+class AKAdminConfig(AdminConfig):
+    default_site = 'AKModel.site.AKAdminSite'

AKModel/site.py

+from django.contrib.admin import AdminSite
+
+from AKModel.models import Event
+
+
+class AKAdminSite(AdminSite):
+    index_template = "admin/ak_index.html"
+
+    def get_urls(self):
+        from django.urls import path
+
+        urls = super().get_urls()
+        urls += [
+            # path('...', self.admin_view(...)),
+        ]
+        return urls
+
+    def index(self, request, extra_context=None):
+        if extra_context is None:
+            extra_context = {}
+        extra_context["active_events"] = Event.objects.filter(active=True)
+        return super().index(request, extra_context)

AKModel/templates/admin/ak_index.html

+{% extends "admin/index.html" %}
+
+{% load i18n tz %}
+
+{% block content %}
+    <div style="margin-bottom: 20px;">
+        <h2>{% trans "Active Events" %}:</h2>
+
+        <ul>
+            {% for event in active_events %}
+                <li>
+                    {{ event }}
+                    ({{ event.start|timezone:event.timezone|date:"d.m.y"}} -
+                    {{ event.end|timezone:event.timezone|date:"d.m.y"}})
+                </li>
+           {% endfor %}
+        </ul>
+    </div>
+{{ block.super }}
+{% endblock %}

AKModel/views.py

+from django.contrib import admin
 from django.shortcuts import get_object_or_404
 from django.views.generic import TemplateView
 from rest_framework import viewsets, permissions, mixins
@@ -50,6 +51,13 @@ class FilterByEventSlugMixin(EventSlugMixin):
         return super().get_queryset().filter(event=self.event)
 
 
+class AdminViewMixin:
+    def get_context_data(self, **kwargs):
+        extra = admin.site.each_context(self.request)
+        extra.update(super().get_context_data(**kwargs))
+        return extra
+
+
 class AKOwnerViewSet(EventSlugMixin, mixins.RetrieveModelMixin, mixins.ListModelMixin, viewsets.GenericViewSet):
     permission_classes = (permissions.DjangoModelPermissionsOrAnonReadOnly,)
     serializer_class = AKOwnerSerializer

AKPlanning/settings.py

@@ -37,7 +37,7 @@ INSTALLED_APPS = [
     'AKSubmission.apps.AksubmissionConfig',
     'AKScheduling.apps.AkschedulingConfig',
     'AKPlan.apps.AkplanConfig',
-    'django.contrib.admin',
+    'AKModel.apps.AKAdminConfig',
     'django.contrib.auth',
     'django.contrib.contenttypes',
     'django.contrib.sessions',

templates/admin_base.html

+{% extends "admin/base_site.html" %}
+
+{% load bootstrap4 %}
+{% load fontawesome_5 %}
+
+{% block extrahead %}
+    {% bootstrap_css %}
+    {% bootstrap_javascript jquery='slim' %}
+    {% fontawesome_5_static %}
+
+    <style>
+        a.btn {
+            color: #FFFFFF;
+        }
+
+        .block-header {
+            margin-top: 20px;
+        }
+    </style>
+{% endblock %}