diff --git a/fet2020/intern/urls.py b/fet2020/intern/urls.py
index b9d3fcf6..649fa21a 100644
--- a/fet2020/intern/urls.py
+++ b/fet2020/intern/urls.py
@@ -1,4 +1,4 @@
-from django.urls import path
+from django.urls import include, path
 
 from . import apps
 from . import views
@@ -17,43 +17,54 @@ from .views import (
 
 app_name = apps.InternConfig.name
 
-urlpatterns = [
-    path("", views.index, name="index"),
+attachment_urlpatterns = [
     path(
-        "<slug:topic_group>/topic-create/",
-        TopicCreateView.as_view(),
-        name="topic-create",
-    ),
-    path("<slug:slug>/", TopicDetailView.as_view(), name="topic"),
-    path(
-        "<slug:slug>/update/",
-        TopicUpdateView.as_view(),
-        name="topic-update",
-    ),
-    path(
-        "<slug:slug>/attachment-create/",
-        AttachmentCreateView.as_view(),
-        name="attachment-create",
-    ),
-    path("<slug:slug>/create/", TaskCreateView.as_view(), name="task-create"),
-    path(
-        "<slug:topic_slug>/<slug:slug>/",
+        "",
         AttachmentDetailView.as_view(),
         name="attachment",
     ),
     path(
-        "<slug:topic_slug>/<slug:slug>/update/",
+        "update/",
         AttachmentUpdateView.as_view(),
         name="attachment-update",
     ),
     path(
-        "<slug:topic_slug>/<slug:slug>/etherpad-create/",
+        "etherpad-create/",
         EtherpadCreateView.as_view(),
         name="etherpad-create",
     ),
     path(
-        "<slug:topic_slug>/<slug:slug>/file-create/",
+        "file-create/",
         FileUploadCreateView.as_view(),
         name="file-create",
     ),
 ]
+
+topic_urlpatterns = [
+    path("", TopicDetailView.as_view(), name="topic"),
+    path(
+        "update/",
+        TopicUpdateView.as_view(),
+        name="topic-update",
+    ),
+    path(
+        "attachment-create/",
+        AttachmentCreateView.as_view(),
+        name="attachment-create",
+    ),
+    path("create/", TaskCreateView.as_view(), name="task-create"),
+]
+
+urlpatterns = [
+    path("", views.index, name="index"),
+    path(
+        "<slug:topic_group_slug>/topic-create/",
+        TopicCreateView.as_view(),
+        name="topic-create",
+    ),
+    path("<slug:topic_group_slug>/<slug:slug>/", include(topic_urlpatterns)),
+    path(
+        "<slug:topic_group_slug>/<slug:topic_slug>/<slug:slug>/",
+        include(attachment_urlpatterns),
+    ),
+]
diff --git a/fet2020/intern/views.py b/fet2020/intern/views.py
index ffb5f1b6..8df3b023 100644
--- a/fet2020/intern/views.py
+++ b/fet2020/intern/views.py
@@ -47,12 +47,10 @@ def index(request):
 
 
 class TopicCreateView(LoginRequiredMixin, CreateView):
+    form_class = TopicCreateForm
     model = Topic
     success_url = reverse_lazy("intern:index")
     template_name = "intern/topic/topic_create.html"
-    form_class = TopicCreateForm
-
-    slug = None
 
     def form_valid(self, form):
         form.instance.created_by = self.request.user
@@ -61,75 +59,61 @@ class TopicCreateView(LoginRequiredMixin, CreateView):
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
-        context["topic_group"] = TopicGroup.objects.get(slug=self.slug)
+        topic_group_slug = self.kwargs.get("topic_group_slug")
+        context["topic_group"] = TopicGroup.objects.get(slug=topic_group_slug)
         return context
 
-    def get_initial(self):
-        self.slug = self.kwargs.get("topic_group")
-
 
 class TopicDetailView(LoginRequiredMixin, DetailView):
     model = Topic
     template_name = "intern/topic/topic_detail.html"
 
-    slug = None
-
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
 
-        self.slug = self.object.slug
-
-        active_topic = Topic.objects.get(id=self.object.id)
-        attachments = Attachment.objects.filter(topic__slug=self.slug).order_by("title")
+        attachments = Attachment.objects.filter(topic=self.object).order_by("title")
 
         tasks = None
-        if active_topic.task_list:
+        if self.object.task_list:
             tasks = deque(
                 Task.taskmanager.get_tasks(
                     user=None,
                     assigned_tasks=True,
-                    task_list=active_topic.task_list,
+                    task_list=self.object.task_list,
                     completed=False,
                 )
             )
 
-        context = {
-            "active_topic": active_topic,
-            "attachments": attachments,
-            "tasks": tasks,
-        }
+        context["topic"] = self.object
+        context["attachments"] = attachments
+        context["tasks"] = tasks
 
         return context
 
+    def get_queryset(self):
+        topic_group_slug = self.kwargs.get("topic_group_slug")
+        return Topic.objects.filter(Q(topic_group__slug=topic_group_slug))
+
 
 class TopicUpdateView(LoginRequiredMixin, UpdateView):
     model = Topic
     template_name = "intern/topic/topic_update.html"
     form_class = TopicUpdateForm
 
-    slug = None
-
     def form_valid(self, form):
         form.instance.created_by = self.request.user
         add_log_action(self.request, form, "intern", "topic", False)
-
-        # get new slug
-        obj = form.save(commit=False)
-        self.slug = obj.slug
         return super().form_valid(form)
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
-        context["slug"] = self.slug
-        context["topic"] = Topic.objects.get(slug=self.slug)
+        context["topic"] = self.object
         return context
 
-    def get_initial(self):
-        self.slug = self.kwargs.get("slug")
-
     def get_success_url(self):
         context = {
-            "slug": self.slug,
+            "topic_group_slug": self.object.topic_group.slug,
+            "slug": self.object.slug,
         }
         return reverse("intern:topic", kwargs=context)
 
@@ -139,8 +123,6 @@ class AttachmentCreateView(LoginRequiredMixin, CreateView):
     template_name = "intern/attachment/attachment_create.html"
     form_class = AttachmentCreateForm
 
-    slug = None
-
     def form_valid(self, form):
         form.instance.created_by = self.request.user
         add_log_action(self.request, form, "intern", "attachment", True)
@@ -148,28 +130,21 @@ class AttachmentCreateView(LoginRequiredMixin, CreateView):
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
-        context["slug"] = self.slug
-        context["topic"] = Topic.objects.get(slug=self.slug)
-
+        topic_group_slug = self.kwargs.get("topic_group_slug")
+        topic_slug = self.kwargs.get("slug")
+        context["topic"] = Topic.objects.get(
+            Q(topic_group__slug=topic_group_slug) & Q(slug=topic_slug)
+        )
         return context
 
-    def get_initial(self):
-        self.slug = self.kwargs.get("slug")
-
     def get_success_url(self):
-        context = {
-            "slug": self.slug,
-        }
-        return reverse("intern:topic", kwargs=context)
+        return reverse("intern:topic", kwargs=self.kwargs)
 
 
 class AttachmentDetailView(LoginRequiredMixin, DetailView):
     model = Attachment
     template_name = "intern/attachment/attachment_detail.html"
 
-    topic_slug = None
-    slug = None
-
     def get(self, request, *args, **kwargs):
         response = super().get(request, *args, **kwargs)
 
@@ -183,67 +158,56 @@ class AttachmentDetailView(LoginRequiredMixin, DetailView):
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
 
-        self.topic_slug = self.object.topic.slug
-        self.slug = self.object.slug
-
-        context["active_topic"] = Topic.objects.get(slug=self.topic_slug)
-
-        attachment = Attachment.objects.get(id=self.object.id)
-        context["attachment"] = attachment
-
-        etherpads = Etherpad.objects.filter(attachment=attachment).order_by("-date")
+        context["attachment"] = self.object
+        etherpads = Etherpad.objects.filter(attachment=self.object).order_by("-date")
         context["etherpads"] = etherpads
-        context["files"] = FileUpload.objects.filter(attachment=attachment)
+        context["files"] = FileUpload.objects.filter(attachment=self.object)
 
         return context
 
+    def get_queryset(self):
+        topic_group_slug = self.kwargs.get("topic_group_slug")
+        topic_slug = self.kwargs.get("topic_slug")
+        return Attachment.objects.filter(
+            Q(topic__topic_group__slug=topic_group_slug) & Q(topic__slug=topic_slug)
+        )
+
 
 class AttachmentUpdateView(LoginRequiredMixin, UpdateView):
+    form_class = AttachmentUpdateForm
     model = Attachment
     template_name = "intern/attachment/attachment_update.html"
-    form_class = AttachmentUpdateForm
-
-    topic_slug = None
-    slug = None
 
     def form_valid(self, form):
         form.instance.created_by = self.request.user
         add_log_action(self.request, form, "intern", "attachment", False)
-
-        # get new slug
-        obj = form.save(commit=False)
-        self.slug = obj.slug
         return super().form_valid(form)
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
-        context["topic"] = Topic.objects.get(slug=self.topic_slug)
-
-        attachment = Attachment.objects.get(
-            Q(slug=self.slug) & Q(topic__slug=self.topic_slug)
-        )
-        context["attachment"] = attachment
+        context["attachment"] = self.object
         return context
 
-    def get_initial(self):
-        self.topic_slug = self.kwargs.get("topic_slug")
-        self.slug = self.kwargs.get("slug")
+    def get_queryset(self):
+        topic_group_slug = self.kwargs.get("topic_group_slug")
+        topic_slug = self.kwargs.get("topic_slug")
+        return Attachment.objects.filter(
+            Q(topic__topic_group__slug=topic_group_slug) & Q(topic__slug=topic_slug)
+        )
 
     def get_success_url(self):
         context = {
-            "topic_slug": self.topic_slug,
-            "slug": self.slug,
+            "topic_group_slug": self.object.topic.topic_group.slug,
+            "topic_slug": self.object.topic.slug,
+            "slug": self.object.slug,
         }
         return reverse("intern:attachment", kwargs=context)
 
 
 class EtherpadCreateView(LoginRequiredMixin, CreateView):
+    form_class = EtherpadForm
     model = Etherpad
     template_name = "intern/etherpad_create.html"
-    form_class = EtherpadForm
-
-    topic_slug = None
-    slug = None
 
     def form_valid(self, form):
         form.instance.created_by = self.request.user
@@ -252,35 +216,25 @@ class EtherpadCreateView(LoginRequiredMixin, CreateView):
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
-        context["topic_slug"] = self.topic_slug
-        context["slug"] = self.slug
-
+        topic_group_slug = self.kwargs.get("topic_group_slug")
+        topic_slug = self.kwargs.get("topic_slug")
+        slug = self.kwargs.get("slug")
         attachment = Attachment.objects.get(
-            Q(slug=self.slug) & Q(topic__slug=self.topic_slug)
+            Q(topic__topic_group__slug=topic_group_slug)
+            & Q(topic__slug=topic_slug)
+            & Q(slug=slug)
         )
         context["attachment"] = attachment
-
         return context
 
-    def get_initial(self):
-        self.topic_slug = self.kwargs.get("topic_slug")
-        self.slug = self.kwargs.get("slug")
-
     def get_success_url(self):
-        context = {
-            "topic_slug": self.topic_slug,
-            "slug": self.slug,
-        }
-        return reverse("intern:attachment", kwargs=context)
+        return reverse("intern:attachment", kwargs=self.kwargs)
 
 
 class FileUploadCreateView(LoginRequiredMixin, CreateView):
+    form_class = FileUploadForm
     model = FileUpload
     template_name = "intern/file_create.html"
-    form_class = FileUploadForm
-
-    topic_slug = None
-    slug = None
 
     def form_valid(self, form):
         form.instance.created_by = self.request.user
@@ -289,34 +243,25 @@ class FileUploadCreateView(LoginRequiredMixin, CreateView):
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
-        context["topic_slug"] = self.topic_slug
-        context["slug"] = self.slug
-
+        topic_group_slug = self.kwargs.get("topic_group_slug")
+        topic_slug = self.kwargs.get("topic_slug")
+        slug = self.kwargs.get("slug")
         attachment = Attachment.objects.get(
-            Q(slug=self.slug) & Q(topic__slug=self.topic_slug)
+            Q(topic__topic_group__slug=topic_group_slug)
+            & Q(topic__slug=topic_slug)
+            & Q(slug=slug)
         )
         context["attachment"] = attachment
-
         return context
 
-    def get_initial(self):
-        self.topic_slug = self.kwargs.get("topic_slug")
-        self.slug = self.kwargs.get("slug")
-
     def get_success_url(self):
-        context = {
-            "topic_slug": self.topic_slug,
-            "slug": self.slug,
-        }
-        return reverse("intern:attachment", kwargs=context)
+        return reverse("intern:attachment", kwargs=self.kwargs)
 
 
 class TaskCreateView(LoginRequiredMixin, CreateView):
+    form_class = InternTaskCreateForm
     model = Task
     template_name = "intern/task_create.html"
-    form_class = InternTaskCreateForm
-
-    slug = None
 
     def form_valid(self, form):
         form.instance.created_by = self.request.user
@@ -325,19 +270,10 @@ class TaskCreateView(LoginRequiredMixin, CreateView):
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
-        context["slug"] = self.slug
-
-        topic = Topic.objects.get(slug=self.slug)
+        slug = self.kwargs.get("slug")
+        topic = Topic.objects.get(slug=slug)
         context["topic"] = topic
-        context["task_list"] = topic.task_list
-
         return context
 
-    def get_initial(self):
-        self.slug = self.kwargs.get("slug")
-
     def get_success_url(self):
-        context = {
-            "slug": self.slug,
-        }
-        return reverse("intern:topic", kwargs=context)
+        return reverse("intern:topic", kwargs=self.kwargs)
diff --git a/fet2020/templates/intern/attachment/attachment_detail.html b/fet2020/templates/intern/attachment/attachment_detail.html
index 6cba1da0..8c0bb391 100644
--- a/fet2020/templates/intern/attachment/attachment_detail.html
+++ b/fet2020/templates/intern/attachment/attachment_detail.html
@@ -8,9 +8,9 @@
     <h1 class="page-title">Intern</h1>
     <div class="flex flex-col gap-y-4 max-w-prose mx-auto text-gray-700 dark:text-gray-300">
         <aside class="flex gap-2 flex-wrap align-bottom text-sm sm:text-base text-gray-600 dark:text-gray-300">
-            <a class="underline hover:text-gray-900 dark:hover:text-gray-100" href="{% url 'intern:index' %}#{{ active_topic.topic_group.slug }}">{{ active_topic.topic_group.title }}</a>
+            <a class="underline hover:text-gray-900 dark:hover:text-gray-100" href="{% url 'intern:index' %}#{{ attachment.topic.topic_group.slug }}">{{ attachment.topic.topic_group.title }}</a>
             <span><i class="fa-solid fa-angle-right"></i></span>
-            <a class="underline hover:text-gray-900 dark:hover:text-gray-100" href="{% url 'intern:topic' active_topic.slug %}">{{ active_topic.title }}</a>
+            <a class="underline hover:text-gray-900 dark:hover:text-gray-100" href="{% url 'intern:topic' attachment.topic.topic_group.slug attachment.topic.slug %}">{{ attachment.topic.title }}</a>
             <span><i class="fa-solid fa-angle-right"></i></span>
             <span class="cursor-default">{{ attachment.title }}</span>
         </aside>
@@ -29,7 +29,7 @@
                 </a> -->
             </div>
             <div class="documentList rounded divide-y divide-gray-300 dark:divide-gray-600">
-                <a href="{% url 'intern:etherpad-create' active_topic.slug attachment.slug %}" class="flex justify-between">
+                <a href="{% url 'intern:etherpad-create' attachment.topic.topic_group.slug attachment.topic.slug attachment.slug %}" class="flex justify-between">
                     <h3 class="text-gray-800 dark:text-gray-200"><i class="fa-solid fa-plus fa-fw mr-1"></i>Neues Etherpad erstellen</h2>
                 </a>
 
@@ -45,7 +45,7 @@
         <section>
             <h2 class="text-lg font-medium text-gray-900 dark:text-gray-100">Dokumente:</h2>
             <div class="documentList rounded divide-y divide-gray-300 dark:divide-gray-600">
-                <a href="{% url 'intern:file-create' active_topic.slug attachment.slug %}" class="flex justify-between">
+                <a href="{% url 'intern:file-create' attachment.topic.topic_group.slug attachment.topic.slug attachment.slug %}" class="flex justify-between">
                     <h3 class="text-gray-800 dark:text-gray-200"><i class="fa-solid fa-plus fa-fw mr-1"></i>Neues Dokument hochladen</h2>
                 </a>
 
@@ -58,7 +58,7 @@
             </div>
         </section>
 
-        <a href="{% url 'intern:attachment-update' active_topic.slug attachment.slug %}" class="btn btn-primary block place-self-end"><i class="fa-solid fa-pen-to-square mr-2"></i>Beschreibung bearbeiten</a>
+        <a href="{% url 'intern:attachment-update' attachment.topic.topic_group.slug attachment.topic.slug attachment.slug %}" class="btn btn-primary block place-self-end"><i class="fa-solid fa-pen-to-square mr-2"></i>Beschreibung bearbeiten</a>
     </div>
 </main>
 {% endblock %}
diff --git a/fet2020/templates/intern/attachment/attachment_update.html b/fet2020/templates/intern/attachment/attachment_update.html
index 7c94656f..83d290c8 100644
--- a/fet2020/templates/intern/attachment/attachment_update.html
+++ b/fet2020/templates/intern/attachment/attachment_update.html
@@ -39,7 +39,7 @@
                 {{ form.description }}
             </label>
 
-            <input type="hidden" name="topic" value="{{ topic.id }}" id="id_topic">
+            <input type="hidden" name="topic" value="{{ attachment.topic.id }}" id="id_topic">
 
             <input type="submit" class="block btn btn-primary" value="Bearbeiten">
         </form>
diff --git a/fet2020/templates/intern/index.html b/fet2020/templates/intern/index.html
index 8e6c2d66..abfe3f28 100644
--- a/fet2020/templates/intern/index.html
+++ b/fet2020/templates/intern/index.html
@@ -29,7 +29,7 @@
                 </div>
                 <ul class="ml-7 w-fit" x-show="expandList" x-collapse>
                     {% for topic in topic_group.list %}
-                        <li><a href="{% url 'intern:topic' topic.slug %}" class="w-full py-1 inline-block">{{ topic.title }}</a></li>
+                        <li><a href="{% url 'intern:topic' topic.topic_group.slug topic.slug %}" class="w-full py-1 inline-block">{{ topic.title }}</a></li>
                     {% endfor %}
                     <li class="py-1">
                         <a href="{% url 'intern:topic-create' topic_group.grouper.slug %}" class="border border-gray-700 dark:border-gray-300 rounded px-1.5 py-1 text-sm sm:hidden">
@@ -81,7 +81,7 @@
                 </div>
                 <ul class="ml-7 w-fit" x-show="expandList" x-collapse>
                     {% for topic in archive_topic %}
-                        <li><a href="{% url 'intern:topic' topic.slug %}" class="w-full py-1 inline-block">{{ topic.title }}</a></li>
+                        <li><a href="{% url 'intern:topic' topic.topic_group.slug topic.slug %}" class="w-full py-1 inline-block">{{ topic.title }}</a></li>
                     {% endfor %}
                 </ul>
             </section>
diff --git a/fet2020/templates/intern/task_create.html b/fet2020/templates/intern/task_create.html
index eaf3addf..d16cb036 100644
--- a/fet2020/templates/intern/task_create.html
+++ b/fet2020/templates/intern/task_create.html
@@ -51,7 +51,7 @@
                 </select>
             </label>
 
-            <input type="hidden" name="task_list" value="{{ task_list.id }}" id="id_task_list">
+            <input type="hidden" name="task_list" value="{{ topic.task_list.id }}" id="id_task_list">
 
             <input type="submit" class="block btn btn-primary" value="Hinzufügen">
         </form>
diff --git a/fet2020/templates/intern/topic/topic_detail.html b/fet2020/templates/intern/topic/topic_detail.html
index 4c26e0dc..1ae8d535 100644
--- a/fet2020/templates/intern/topic/topic_detail.html
+++ b/fet2020/templates/intern/topic/topic_detail.html
@@ -1,6 +1,6 @@
 {% extends "base.html" %}
 
-{% block title %}{{ active_topic.title }}{% endblock %}
+{% block title %}{{ topic.title }}{% endblock %}
 
 {% block content %}
 <!-- Main Content -->
@@ -8,14 +8,14 @@
     <h1 class="page-title">Intern</h1>
     <div class="flex flex-col gap-y-8 max-w-prose mx-auto text-gray-700 dark:text-gray-300">
         <aside class="flex gap-2 flex-wrap align-bottom text-sm sm:text-base text-gray-600 dark:text-gray-300">
-            <a class="underline hover:text-gray-900 dark:hover:text-gray-100" href="{% url 'intern:index' %}#{{ active_topic.topic_group.slug }}">{{ active_topic.topic_group.title }}</a>
+            <a class="underline hover:text-gray-900 dark:hover:text-gray-100" href="{% url 'intern:index' %}#{{ topic.topic_group.slug }}">{{ topic.topic_group.title }}</a>
             <span><i class="fa-solid fa-angle-right"></i></span>
-            <span class="cursor-default">{{ active_topic.title }}</span>
+            <span class="cursor-default">{{ topic.title }}</span>
         </aside>
 
-        {% if active_topic.description %}
+        {% if topic.description %}
             <div class="db-page-content-left">
-                {{ active_topic.description|safe }}
+                {{ topic.description|safe }}
             </div>
         {% endif %}
 
@@ -32,20 +32,20 @@
 
         <ul class="flex flex-col gap-1 max-w-fit">
             {% for attachment in attachments %}
-                <li><a href="{% url 'intern:attachment' active_topic.slug attachment.slug %}" class="py-1 inline-block">{{ attachment.title }}</a></li>
+                <li><a href="{% url 'intern:attachment' topic.topic_group.slug topic.slug attachment.slug %}" class="py-1 inline-block">{{ attachment.title }}</a></li>
             {% endfor %}
 
             <li class="mt-2">
-                <a href="{% url 'intern:attachment-create' active_topic.slug %}" class="border border-gray-700 dark:border-gray-300 rounded px-1.5 py-1">
+                <a href="{% url 'intern:attachment-create' topic.topic_group.slug topic.slug %}" class="border border-gray-700 dark:border-gray-300 rounded px-1.5 py-1">
                     <i class="fa-solid fa-plus mr-1"></i>Eintrag hinzufügen
                 </a>
             </li>
         </ul>
         
         <section class="flex flex-col sm:flex-row justify-end gap-4">
-            <a href="{% url 'intern:topic-update' active_topic.slug %}" class="btn btn-primary block"><i class="fa-solid fa-pen-to-square mr-2"></i>Thema bearbeiten</a>
-            {% if active_topic.task_list %}
-                <a href="{% url 'intern:task-create' active_topic.slug %}" class="btn btn-primary block"><i class="fa-solid fa-plus-square mr-2"></i>Task hinzufügen</a>
+            <a href="{% url 'intern:topic-update' topic.topic_group.slug topic.slug %}" class="btn btn-primary block"><i class="fa-solid fa-pen-to-square mr-2"></i>Thema bearbeiten</a>
+            {% if topic.task_list %}
+                <a href="{% url 'intern:task-create' topic.topic_group.slug topic.slug %}" class="btn btn-primary block"><i class="fa-solid fa-plus-square mr-2"></i>Task hinzufügen</a>
             {% endif %}
         </section>
     </div>