AKOnline/models.py

 from django.db import models
 from django.utils.translation import gettext_lazy as _
 
-from AKModel.models import Event, Room
+from AKModel.models import Room
 
 
 class VirtualRoom(models.Model):
@@ -18,6 +18,12 @@ class VirtualRoom(models.Model):
 
     @property
     def event(self):
+        """
+        Property: Event this virtual room belongs to.
+
+        :return: Event this virtual room belongs to
+        :rtype: Event
+        """
         return self.room.event
 
     def __str__(self):

AKOnline/tests.py

-# Create your tests here.

AKOnline/views.py

@@ -9,20 +9,31 @@ from AKOnline.forms import RoomWithVirtualForm
 
 
 class RoomCreationWithVirtualView(RoomCreationView):
+    """
+    View to create both rooms and optionally virtual rooms by filling one form
+    """
     form_class = RoomWithVirtualForm
     template_name = 'admin/AKOnline/room_create_with_virtual.html'
+    room = None
 
     def form_valid(self, form):
+        # This will create the room and additionally a virtual room if the url field is not blank
+        # objects['room'] will always a room instance afterwards, objects['virtual'] may be empty
         objects = form.save()
         self.room = objects['room']
-        messages.success(self.request, _("Created Room '%(room)s'" % {'room': objects['room']}))
+        # Create a (translated) success message containing information about the created room
+        messages.success(self.request, _("Created Room '%(room)s'" % {'room': objects['room']})) #pylint: disable=consider-using-f-string, line-too-long
         if objects['virtual'] is not None:
-            messages.success(self.request, _("Created related Virtual Room '%(vroom)s'" % {'vroom': objects['virtual']}))
+            # Create a (translated) success message containing information about the created virtual room
+            messages.success(self.request, _("Created related Virtual Room '%(vroom)s'" % {'vroom': objects['virtual']})) #pylint: disable=consider-using-f-string, line-too-long
         return HttpResponseRedirect(self.get_success_url())
 
 
 @status_manager.register(name="event_virtual_rooms")
 class EventVirtualRoomsWidget(TemplateStatusWidget):
+    """
+    Status page widget to contain information about all virtual rooms belonging to the given event
+    """
     required_context_type = "event"
     title = _("Virtual Rooms")
     template_name = "admin/AKOnline/status/event_virtual_rooms.html"

AKPlan/admin.py

-# Register your models here.

AKPlan/apps.py

@@ -2,4 +2,7 @@ from django.apps import AppConfig
 
 
 class AkplanConfig(AppConfig):
+    """
+    App configuration (default, only specifies name of the app)
+    """
     name = 'AKPlan'

AKPlan/models.py

-# Create your models here.

AKPlan/templates/AKPlan/plan_wall.html

@@ -51,6 +51,8 @@
                     start: '{{ start | timezone:event.timezone | date:"Y-m-d H:i:s" }}',
                     end: '{{ end | timezone:event.timezone  | date:"Y-m-d H:i:s"}}',
                 },
+                slotMinTime: '{{ earliest_start_hour }}:00:00',
+                slotMaxTime: '{{ latest_end_hour }}:00:00',
                 eventDidMount: function(info) {
                     $(info.el).tooltip({title: info.event.extendedProps.description});
                 },

AKPlan/templatetags/color_gradients.py

 # gradients based on http://bsou.io/posts/color-gradients-with-python
 
 
-def hex_to_rgb(hex):
+def hex_to_rgb(hex): #pylint: disable=redefined-builtin
     """
     Convert hex color to RGB color code
     :param hex: hex encoded color
@@ -23,8 +23,7 @@ def rgb_to_hex(rgb):
     """
     # Components need to be integers for hex to make sense
     rgb = [int(x) for x in rgb]
-    return "#"+"".join(["0{0:x}".format(v) if v < 16 else
-                        "{0:x}".format(v) for v in rgb])
+    return "#"+"".join([f"0{v:x}" if v < 16 else f"{v:x}" for v in rgb])
 
 
 def linear_blend(start_hex, end_hex, position):

AKPlan/templatetags/tags_AKPlan.py

@@ -11,6 +11,14 @@ register = template.Library()
 
 @register.filter
 def highlight_change_colors(akslot):
+    """
+    Adjust color to highlight recent changes if needed
+
+    :param akslot: akslot to determine color for
+    :type akslot: AKSlot
+    :return: color that should be used (either default color of the category or some kind of red)
+    :rtype: str
+    """
     # Do not highlight in preview mode or when changes occurred before the plan was published
     if akslot.event.plan_hidden or (akslot.event.plan_published_at is not None
                                     and akslot.event.plan_published_at > akslot.updated):
@@ -25,9 +33,14 @@ def highlight_change_colors(akslot):
     # Recent change? Calculate gradient blend between red and
     recentness = seconds_since_update / settings.PLAN_MAX_HIGHLIGHT_UPDATE_SECONDS
     return darken("#b71540", recentness)
-    # return linear_blend("#b71540", "#000000", recentness)
 
 
 @register.simple_tag
 def timestamp_now(tz):
+    """
+    Get the current timestamp for the given timezone
+
+    :param tz: timezone to be used for the timestamp
+    :return: current timestamp in given timezone
+    """
     return date_format(datetime.now().astimezone(tz), "c")

AKPlan/tests.py

 from django.test import TestCase
 
-from AKModel.tests import BasicViewTests
+from AKModel.tests.test_views import BasicViewTests
 
 
 class PlanViewTests(BasicViewTests, TestCase):
+    """
+    Tests for AKPlan
+    """
     fixtures = ['model.json']
     APP_NAME = 'plan'
 
@@ -15,7 +18,10 @@ class PlanViewTests(BasicViewTests, TestCase):
     ]
 
     def test_plan_hidden(self):
-        view_name_with_prefix, url = self._name_and_url(('plan_overview', {'event_slug': 'kif23'}))
+        """
+        Test correct handling of plan visibility
+        """
+        _, url = self._name_and_url(('plan_overview', {'event_slug': 'kif23'}))
 
         self.client.logout()
         response = self.client.get(url)
@@ -28,8 +34,11 @@ class PlanViewTests(BasicViewTests, TestCase):
                                msg_prefix="Plan is not visible for staff user")
 
     def test_wall_redirect(self):
-        view_name_with_prefix, url_wall = self._name_and_url(('plan_wall', {'event_slug': 'kif23'}))
-        view_name_with_prefix, url_plan = self._name_and_url(('plan_overview', {'event_slug': 'kif23'}))
+        """
+        Test: Make sure that user is redirected from wall to overview when plan is hidden
+        """
+        _, url_wall = self._name_and_url(('plan_wall', {'event_slug': 'kif23'}))
+        _, url_plan = self._name_and_url(('plan_overview', {'event_slug': 'kif23'}))
 
         response = self.client.get(url_wall)
         self.assertRedirects(response, url_plan,

AKPlan/views.py

-from datetime import timedelta
+from datetime import datetime, timedelta
 
 from django.conf import settings
 from django.shortcuts import redirect
 from django.urls import reverse_lazy
-from django.utils.datetime_safe import datetime
-from django.views.generic import ListView, DetailView
+from django.views.generic import DetailView, ListView
 
-from AKModel.models import AKSlot, Room, AKTrack
 from AKModel.metaviews.admin import FilterByEventSlugMixin
+from AKModel.models import AKSlot, AKTrack, Room
 
 
 class PlanIndexView(FilterByEventSlugMixin, ListView):
+    """
+    Default plan view
+
+    Shows two lists of current and upcoming AKs and a graphical full plan below
+    """
     model = AKSlot
     template_name = "AKPlan/plan_index.html"
     context_object_name = "akslots"
@@ -60,6 +64,15 @@ class PlanIndexView(FilterByEventSlugMixin, ListView):
 
 
 class PlanScreenView(PlanIndexView):
+    """
+    Plan view optimized for screens and projectors
+
+    This again shows current and upcoming AKs as well as a graphical plan,
+    but no navigation elements and trys to use the available space as best as possible
+    such that no scrolling is needed.
+
+    The view contains a frontend functionality for auto-reload.
+    """
     template_name = "AKPlan/plan_wall.html"
 
     def get(self, request, *args, **kwargs):
@@ -69,11 +82,12 @@ class PlanScreenView(PlanIndexView):
             return redirect(reverse_lazy("plan:plan_overview", kwargs={"event_slug": self.event.slug}))
         return s
 
-    """
+    # pylint: disable=attribute-defined-outside-init
     def get_queryset(self):
-        # Determine interesting range (some hours ago until some hours in the future as specified in the settings)
         now = datetime.now().astimezone(self.event.timezone)
+        # Wall during event: Adjust, show only parts in the future
         if self.event.start < now < self.event.end:
+            # Determine interesting range (some hours ago until some hours in the future as specified in the settings)
             self.start = now - timedelta(hours=settings.PLAN_WALL_HOURS_RETROSPECT)
         else:
             self.start = self.event.start
@@ -81,33 +95,63 @@ class PlanScreenView(PlanIndexView):
 
         # Restrict AK slots to relevant ones
         # This will automatically filter all rooms not needed for the selected range in the orginal get_context method
-        return super().get_queryset().filter(start__gt=self.start)
-    """
+        akslots = super().get_queryset().filter(start__gt=self.start)
+
+        # Find the earliest hour AKs start and end (handle 00:00 as 24:00)
+        self.earliest_start_hour = 23
+        self.latest_end_hour = 1
+        for akslot in akslots.all():
+            start_hour = akslot.start.astimezone(self.event.timezone).hour
+            if start_hour < self.earliest_start_hour:
+                # Use hour - 1 to improve visibility of date change
+                self.earliest_start_hour = max(start_hour - 1, 0)
+            end_hour = akslot.end.astimezone(self.event.timezone).hour
+            # Special case: AK starts before but ends after midnight -- show until midnight
+            if end_hour < start_hour:
+                self.latest_end_hour = 24
+            elif end_hour > self.latest_end_hour:
+                # Always use hour + 1, since AK may end at :xy and not always at :00
+                self.latest_end_hour = min(end_hour + 1, 24)
+        return akslots
 
     def get_context_data(self, *, object_list=None, **kwargs):
         context = super().get_context_data(object_list=object_list, **kwargs)
-        context["start"] = self.event.start
+        context["start"] = self.start
         context["end"] = self.event.end
+        context["earliest_start_hour"] = self.earliest_start_hour
+        context["latest_end_hour"] = self.latest_end_hour
         return context
 
 
 class PlanRoomView(FilterByEventSlugMixin, DetailView):
+    """
+    Plan view for a single room
+    """
     template_name = "AKPlan/plan_room.html"
     model = Room
     context_object_name = "room"
 
     def get_context_data(self, *, object_list=None, **kwargs):
         context = super().get_context_data(object_list=object_list, **kwargs)
+        # Restrict AKSlot list to the given room
+        # while joining AK, room and category information to reduce the amount of necessary SQL queries
         context["slots"] = AKSlot.objects.filter(room=context['room']).select_related('ak', 'ak__category', 'ak__track')
         return context
 
 
 class PlanTrackView(FilterByEventSlugMixin, DetailView):
+    """
+    Plan view for a single track
+    """
     template_name = "AKPlan/plan_track.html"
     model = AKTrack
     context_object_name = "track"
 
     def get_context_data(self, *, object_list=None, **kwargs):
         context = super().get_context_data(object_list=object_list, **kwargs)
-        context["slots"] = AKSlot.objects.filter(event=self.event, ak__track=context['track']).select_related('ak', 'room', 'ak__category')
+        # Restrict AKSlot list to given track
+        # while joining AK, room and category information to reduce the amount of necessary SQL queries
+        context["slots"] = AKSlot.objects. \
+            filter(event=self.event, ak__track=context['track']). \
+            select_related('ak', 'room', 'ak__category')
         return context

AKPlanning/locale/de_DE/LC_MESSAGES/django.po

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2023-05-15 20:03+0200\n"
+"POT-Creation-Date: 2023-08-16 16:30+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -17,10 +17,10 @@ msgstr ""
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 
-#: AKPlanning/settings.py:147
+#: AKPlanning/settings.py:148
 msgid "German"
 msgstr "Deutsch"
 
-#: AKPlanning/settings.py:148
+#: AKPlanning/settings.py:149
 msgid "English"
 msgstr "Englisch"

AKPlanning/settings.py

@@ -52,9 +52,9 @@ INSTALLED_APPS = [
     'rest_framework',
     'simple_history',
     'registration',
-    'bootstrap_datepicker_plus',
     'django_tex',
     'compressor',
+    'docs',
 ]
 
 MIDDLEWARE = [
@@ -217,6 +217,9 @@ PLAN_MAX_HIGHLIGHT_UPDATE_SECONDS = 2 * 60 * 60
 DASHBOARD_SHOW_RECENT = True
 # How many entries max?
 DASHBOARD_RECENT_MAX = 25
+# How many events should be featured in the dashboard
+# (active events will always be featured, even if their number is higher than this threshold)
+DASHBOARD_MAX_FEATURED_EVENTS = 3
 
 # Registration/login behavior
 SIMPLE_BACKEND_REDIRECT_URL = "/user/"
@@ -224,7 +227,7 @@ LOGIN_REDIRECT_URL = SIMPLE_BACKEND_REDIRECT_URL
 
 # Content Security Policy
 CSP_DEFAULT_SRC = ("'self'",)
-CSP_SCRIPT_SRC = ("'self'", "'unsafe-inline'")
+CSP_SCRIPT_SRC = ("'self'", "'unsafe-inline'", "'unsafe-eval'")
 CSP_STYLE_SRC = ("'self'", "'unsafe-inline'", "fonts.googleapis.com")
 CSP_IMG_SRC = ("'self'", "data:")
 CSP_FRAME_SRC = ("'self'", )
@@ -234,4 +237,9 @@ CSP_FONT_SRC = ("'self'", "data:", "fonts.gstatic.com")
 SEND_MAILS = True
 EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'
 
+# Documentation
+
+DOCS_ROOT = os.path.join(BASE_DIR, 'docs/_build/html')
+DOCS_ACCESS = 'public'
+
 include(optional("settings/*.py"))

AKPlanning/urls.py

-"""AKPlanning URL Configuration
+"""
+AKPlanning URL Configuration
 
 The `urlpatterns` list routes URLs to views. For more information please see:
     https://docs.djangoproject.com/en/2.2/topics/http/urls/
@@ -13,13 +14,15 @@ Including another URLconf
     1. Import the include() function: from django.urls import include, path
     2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
 """
+
 import debug_toolbar
 from django.apps import apps
 from django.contrib import admin
-from django.urls import path, include
+from django.urls import path, include, re_path
 
 urlpatterns = [
     path('admin/', admin.site.urls),
+    re_path(r'^docs/', include('docs.urls')),
     path('accounts/', include('django.contrib.auth.urls')),
     path('accounts/', include('registration.backends.simple.urls')),
     path('', include('AKModel.urls', namespace='model')),

AKScheduling/admin.py

-# Register your models here.

AKScheduling/api.py

@@ -12,20 +12,32 @@ from AKModel.metaviews.admin import EventSlugMixin
 
 
 class ResourceSerializer(serializers.ModelSerializer):
+    """
+    REST Framework Serializer for Rooms to produce format required for fullcalendar resources
+    """
     class Meta:
         model = Room
         fields = ['id', 'title']
 
     title = serializers.SerializerMethodField('transform_title')
 
-    def transform_title(self, obj):
+    @staticmethod
+    def transform_title(obj):
+        """
+        Adapt title, add capacity information if room has a restriction (capacity is not -1)
+        """
         if obj.capacity > 0:
             return f"{obj.title} [{obj.capacity}]"
         return obj.title
 
 
-class ResourcesViewSet(EventSlugMixin, mixins.RetrieveModelMixin, mixins.ListModelMixin, viewsets.GenericViewSet):
-    permission_classes = (permissions.DjangoModelPermissionsOrAnonReadOnly,)
+class ResourcesViewSet(EventSlugMixin, mixins.ListModelMixin, viewsets.GenericViewSet):
+    """
+    API View: Rooms (resources to schedule for in fullcalendar)
+
+    Read-only, adaption to fullcalendar format through :class:`ResourceSerializer`
+    """
+    permission_classes = (permissions.DjangoModelPermissions,)
     serializer_class = ResourceSerializer
 
     def get_queryset(self):
@@ -33,22 +45,34 @@ class ResourcesViewSet(EventSlugMixin, mixins.RetrieveModelMixin, mixins.ListMod
 
 
 class EventsView(LoginRequiredMixin, EventSlugMixin, ListView):
+    """
+    API View: Slots (events to schedule in fullcalendar)
+
+    Read-only, JSON formatted response is created manually since it requires a bunch of "custom" fields that have
+    different names compared to the normal model or are not present at all and need to be computed to create the
+    required format for fullcalendar.
+    """
     model = AKSlot
 
     def get_queryset(self):
-        return super().get_queryset().select_related('ak').filter(event=self.event, room__isnull=False)
+        return super().get_queryset().select_related('ak').filter(
+            event=self.event, room__isnull=False, start__isnull=False
+        )
 
     def render_to_response(self, context, **response_kwargs):
         return JsonResponse(
             [{
                 "slotID": slot.pk,
-                "title": f'{slot.ak.short_name}: \n{slot.ak.owners_list}',
+                "title": f'{slot.ak.short_name}:\n{slot.ak.owners_list}',
                 "description": slot.ak.details,
                 "resourceId": slot.room.id,
                 "start": timezone.localtime(slot.start, self.event.timezone).strftime("%Y-%m-%d %H:%M:%S"),
                 "end": timezone.localtime(slot.end, self.event.timezone).strftime("%Y-%m-%d %H:%M:%S"),
                 "backgroundColor": slot.ak.category.color,
-                "borderColor": "#2c3e50" if slot.fixed else '#e74c3c' if slot.constraintviolation_set.count() > 0 else slot.ak.category.color,
+                "borderColor":
+                    "#2c3e50" if slot.fixed
+                    else '#e74c3c' if slot.constraintviolation_set.count() > 0
+                    else slot.ak.category.color,
                 "constraint": 'roomAvailable',
                 "editable": not slot.fixed,
                 'url': str(reverse('admin:AKModel_akslot_change', args=[slot.pk])),
@@ -59,6 +83,13 @@ class EventsView(LoginRequiredMixin, EventSlugMixin, ListView):
 
 
 class RoomAvailabilitiesView(LoginRequiredMixin, EventSlugMixin, ListView):
+    """
+    API view: Availabilities of rooms
+
+    Read-only, JSON formatted response is created manually since it requires a bunch of "custom" fields that have
+    different names compared to the normal model or are not present at all and need to be computed to create the
+    required format for fullcalendar.
+    """
     model = Availability
     context_object_name = "availabilities"
 
@@ -81,6 +112,13 @@ class RoomAvailabilitiesView(LoginRequiredMixin, EventSlugMixin, ListView):
 
 
 class DefaultSlotsView(LoginRequiredMixin, EventSlugMixin, ListView):
+    """
+    API view: default slots
+
+    Read-only, JSON formatted response is created manually since it requires a bunch of "custom" fields that have
+    different names compared to the normal model or are not present at all and need to be computed to create the
+    required format for fullcalendar.
+    """
     model = DefaultSlot
     context_object_name = "default_slots"
 
@@ -105,6 +143,9 @@ class DefaultSlotsView(LoginRequiredMixin, EventSlugMixin, ListView):
 
 
 class EventSerializer(serializers.ModelSerializer):
+    """
+    REST framework serializer to adapt between AKSlot model and the event format of fullcalendar
+    """
     class Meta:
         model = AKSlot
         fields = ['id', 'start', 'end', 'roomId']
@@ -114,17 +155,31 @@ class EventSerializer(serializers.ModelSerializer):
     roomId = serializers.IntegerField(source='room.pk')
 
     def update(self, instance, validated_data):
+        # Ignore timezone of input (treat it as timezone-less) and set the event timezone
+        # By working like this, the client does not need to know about timezones, since every timestamp it deals with
+        # has the timezone offsets already applied
         start = timezone.make_aware(timezone.make_naive(validated_data.get('start')), instance.event.timezone)
         end = timezone.make_aware(timezone.make_naive(validated_data.get('end')), instance.event.timezone)
         instance.start = start
-        instance.room = get_object_or_404(Room, pk=validated_data.get('room')["pk"])
+        # Also, adapt from start & end format of fullcalendar to our start & duration model
         diff = end - start
         instance.duration = round(diff.days * 24 + (diff.seconds / 3600), 2)
+
+        # Updated room if needed (pk changed -- otherwise, no need for an additional database lookup)
+        new_room_id = validated_data.get('room')["pk"]
+        if instance.room is None or instance.room.pk != new_room_id:
+            instance.room = get_object_or_404(Room, pk=new_room_id)
+
         instance.save()
         return instance
 
 
-class EventsViewSet(EventSlugMixin, viewsets.ModelViewSet):
+class EventsViewSet(EventSlugMixin, mixins.UpdateModelMixin, viewsets.GenericViewSet):
+    """
+    API view: Update scheduling of a slot (event in fullcalendar format)
+
+    Write-only (will however reply with written values to PUT request)
+    """
     permission_classes = (permissions.DjangoModelPermissions,)
     serializer_class = EventSerializer
 
@@ -136,17 +191,26 @@ class EventsViewSet(EventSlugMixin, viewsets.ModelViewSet):
 
 
 class ConstraintViolationSerializer(serializers.ModelSerializer):
+    """
+    REST Framework Serializer for constraint violations
+    """
     class Meta:
         model = ConstraintViolation
-        fields = ['pk', 'type_display', 'aks', 'ak_slots', 'ak_owner', 'room', 'requirement', 'category', 'comment', 'timestamp_display', 'manually_resolved', 'level_display', 'details', 'edit_url']
+        fields = ['pk', 'type_display', 'aks', 'ak_slots', 'ak_owner', 'room', 'requirement', 'category', 'comment',
+                  'timestamp_display', 'manually_resolved', 'level_display', 'details', 'edit_url']
 
 
-class ConstraintViolationsViewSet(EventSlugMixin, viewsets.ModelViewSet):
+class ConstraintViolationsViewSet(EventSlugMixin, mixins.ListModelMixin, viewsets.GenericViewSet):
+    """
+    API View: Constraint Violations of an event
+
+    Read-only, fields and model selected in :class:`ConstraintViolationSerializer`
+    """
     permission_classes = (permissions.DjangoModelPermissions,)
     serializer_class = ConstraintViolationSerializer
 
-    def get_object(self):
-        return get_object_or_404(ConstraintViolation, pk=self.kwargs["pk"])
-
     def get_queryset(self):
-        return ConstraintViolation.objects.select_related('event', 'room').prefetch_related('aks', 'ak_slots', 'ak_owner', 'requirement', 'category').filter(event=self.event).order_by('manually_resolved', '-type', '-timestamp')
+        # Optimize query to reduce database load
+        return (ConstraintViolation.objects.select_related('event', 'room')
+                .prefetch_related('aks', 'ak_slots', 'ak_owner', 'requirement', 'category')
+                .filter(event=self.event).order_by('manually_resolved', '-type', '-timestamp'))

AKScheduling/apps.py

@@ -2,4 +2,7 @@ from django.apps import AppConfig
 
 
 class AkschedulingConfig(AppConfig):
+    """
+    App configuration (default, only specifies name of the app)
+    """
     name = 'AKScheduling'

AKScheduling/forms.py

 from django import forms
+from django.utils.translation import gettext_lazy as _
 
 from AKModel.models import AK
 
 
 class AKInterestForm(forms.ModelForm):
+    """
+    Form for quickly changing the interest count and notes of an AK
+    """
     required_css_class = 'required'
 
     class Meta:
@@ -11,3 +15,18 @@ class AKInterestForm(forms.ModelForm):
         fields = ['interest',
                   'notes',
                   ]
+
+
+class AKAddSlotForm(forms.Form):
+    """
+    Form to create a new slot for an existing AK directly from scheduling view
+    """
+    start = forms.CharField(label=_("Start"), disabled=True)
+    end = forms.CharField(label=_("End"), disabled=True)
+    duration = forms.CharField(label=_("Duration"), disabled=True)
+    room = forms.IntegerField(label=_("Room"), disabled=True, widget=forms.HiddenInput())
+    room_name = forms.CharField(label=_("Room"), disabled=True)
+
+    def __init__(self, event):
+        super().__init__()
+        self.fields['ak'] = forms.ModelChoiceField(event.ak_set.all(), label=_("AK"))

AKScheduling/locale/de_DE/LC_MESSAGES/django.po

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2023-05-15 20:03+0200\n"
+"POT-Creation-Date: 2025-01-22 19:00+0000\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -17,7 +17,28 @@ msgstr ""
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 
-#: AKScheduling/models.py:80
+#: AKScheduling/forms.py:24
+msgid "Start"
+msgstr "Start"
+
+#: AKScheduling/forms.py:25
+msgid "End"
+msgstr "Ende"
+
+#: AKScheduling/forms.py:26
+msgid "Duration"
+msgstr "Dauer"
+
+#: AKScheduling/forms.py:27
+#: AKScheduling/templates/admin/AKScheduling/scheduling.html:171
+msgid "Room"
+msgstr "Raum"
+
+#: AKScheduling/forms.py:31
+msgid "AK"
+msgstr "AK"
+
+#: AKScheduling/models.py:92
 #, python-format
 msgid ""
 "Not enough space for AK interest (Interest: %(interest)d, Capacity: "
@@ -26,7 +47,7 @@ msgstr ""
 "Nicht genug Platz für AK-Interesse (Interesse: %(interest)d, Kapazität: "
 "%(capacity)d)"
 
-#: AKScheduling/models.py:92
+#: AKScheduling/models.py:106
 #, python-format
 msgid ""
 "Space is too close to AK interest (Interest: %(interest)d, Capacity: "
@@ -40,52 +61,53 @@ msgid "Constraint Violations for"
 msgstr ""
 
 #: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:44
-#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:100
-#: AKScheduling/templates/admin/AKScheduling/scheduling.html:236
-#: AKScheduling/templates/admin/AKScheduling/scheduling.html:371
+#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:105
+#: AKScheduling/templates/admin/AKScheduling/scheduling.html:240
+#: AKScheduling/templates/admin/AKScheduling/scheduling.html:375
 msgid "No violations"
 msgstr "Keine Verletzungen"
 
-#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:77
-#: AKScheduling/templates/admin/AKScheduling/scheduling.html:342
+#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:82
+#: AKScheduling/templates/admin/AKScheduling/scheduling.html:346
 msgid "Violation(s)"
 msgstr "Verletzung(en)"
 
-#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:80
+#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:85
 msgid "Auto reload?"
 msgstr "Automatisch neu laden?"
 
-#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:84
+#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:89
 msgid "Reload now"
 msgstr "Jetzt neu laden"
 
-#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:90
-#: AKScheduling/templates/admin/AKScheduling/scheduling.html:225
+#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:95
+#: AKScheduling/templates/admin/AKScheduling/scheduling.html:228
 msgid "Violation"
 msgstr "Verletzung"
 
-#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:91
-#: AKScheduling/templates/admin/AKScheduling/scheduling.html:365
+#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:96
+#: AKScheduling/templates/admin/AKScheduling/scheduling.html:369
 msgid "Problem"
 msgstr "Problem"
 
-#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:92
+#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:97
 msgid "Details"
 msgstr "Details"
 
-#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:93
+#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:98
 msgid "Since"
 msgstr "Seit"
 
-#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:106
-#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:238
-#: AKScheduling/templates/admin/AKScheduling/scheduling.html:328
+#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:111
+#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:256
+#: AKScheduling/templates/admin/AKScheduling/scheduling.html:332
 #: AKScheduling/templates/admin/AKScheduling/special_attention.html:48
 #: AKScheduling/templates/admin/AKScheduling/unscheduled.html:34
 msgid "Event Status"
 msgstr "Event-Status"
 
-#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:108
+#: AKScheduling/templates/admin/AKScheduling/constraint_violations.html:113
+#: AKScheduling/views.py:48
 msgid "Scheduling"
 msgstr "Scheduling"
 
@@ -95,39 +117,39 @@ msgstr "Abschicken"
 
 #: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:11
 #: AKScheduling/templates/admin/AKScheduling/scheduling.html:21
-#: AKScheduling/templates/admin/AKScheduling/scheduling.html:325
+#: AKScheduling/templates/admin/AKScheduling/scheduling.html:329
 msgid "Scheduling for"
 msgstr "Scheduling für"
 
-#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:124
+#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:135
 msgid "Name of new ak track"
 msgstr "Name des neuen AK-Tracks"
 
-#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:140
+#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:151
 msgid "Could not create ak track"
 msgstr "Konnte neuen AK-Track nicht anlegen"
 
-#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:166
+#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:177
 msgid "Could not update ak track name"
 msgstr "Konnte Namen des AK-Tracks nicht ändern"
 
-#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:172
+#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:183
 msgid "Do you really want to delete this ak track?"
 msgstr "Soll dieser AK-Track wirklich gelöscht werden?"
 
-#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:186
+#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:197
 msgid "Could not delete ak track"
 msgstr "AK-Track konnte nicht gelöscht werden"
 
-#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:198
+#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:216
 msgid "Manage AK Tracks"
 msgstr "AK-Tracks verwalten"
 
-#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:199
+#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:217
 msgid "Add ak track"
 msgstr "AK-Track hinzufügen"
 
-#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:204
+#: AKScheduling/templates/admin/AKScheduling/manage_tracks.html:222
 msgid "AKs without track"
 msgstr "AKs ohne Track"
 
@@ -147,35 +169,31 @@ msgstr "Event (horizontal)"
 msgid "Event (Vertical)"
 msgstr "Event (vertikal)"
 
-#: AKScheduling/templates/admin/AKScheduling/scheduling.html:171
-msgid "Room"
-msgstr "Raum"
-
-#: AKScheduling/templates/admin/AKScheduling/scheduling.html:267
+#: AKScheduling/templates/admin/AKScheduling/scheduling.html:271
 msgid "Please choose AK"
 msgstr "Bitte AK auswählen"
 
-#: AKScheduling/templates/admin/AKScheduling/scheduling.html:287
+#: AKScheduling/templates/admin/AKScheduling/scheduling.html:291
 msgid "Could not create slot"
 msgstr "Konnte Slot nicht anlegen"
 
-#: AKScheduling/templates/admin/AKScheduling/scheduling.html:303
+#: AKScheduling/templates/admin/AKScheduling/scheduling.html:307
 msgid "Add slot"
 msgstr "Slot hinzufügen"
 
-#: AKScheduling/templates/admin/AKScheduling/scheduling.html:311
+#: AKScheduling/templates/admin/AKScheduling/scheduling.html:315
 msgid "Add"
 msgstr "Hinzufügen"
 
-#: AKScheduling/templates/admin/AKScheduling/scheduling.html:312
+#: AKScheduling/templates/admin/AKScheduling/scheduling.html:316
 msgid "Cancel"
 msgstr "Abbrechen"
 
-#: AKScheduling/templates/admin/AKScheduling/scheduling.html:339
+#: AKScheduling/templates/admin/AKScheduling/scheduling.html:343
 msgid "Unscheduled"
 msgstr "Nicht gescheduled"
 
-#: AKScheduling/templates/admin/AKScheduling/scheduling.html:364
+#: AKScheduling/templates/admin/AKScheduling/scheduling.html:368
 msgid "Level"
 msgstr "Level"
 
@@ -203,7 +221,26 @@ msgstr ""
 msgid "AKs without slots"
 msgstr "AKs ohne Slots"
 
+#: AKScheduling/templates/admin/AKScheduling/status/cvs.html:6
+msgid ""
+"\n"
+"            <h3>Constraint Violation</h3>\n"
+"            "
+msgid_plural ""
+"\n"
+"            <h3>Constraint Violations</h3>\n"
+"        "
+msgstr[0] ""
+"\n"
+"            <h3>Constraintverletzung</h3>\n"
+"            "
+msgstr[1] ""
+"\n"
+"            <h3>Constraintverletzungen</h3>\n"
+"        "
+
 #: AKScheduling/templates/admin/AKScheduling/unscheduled.html:7
+#: AKScheduling/views.py:25
 msgid "Unscheduled AK Slots"
 msgstr "Noch nicht geschedulte AK-Slots"
 
@@ -211,19 +248,31 @@ msgstr "Noch nicht geschedulte AK-Slots"
 msgid "Count"
 msgstr "Anzahl"
 
-#: AKScheduling/views.py:112
+#: AKScheduling/views.py:89
+msgid "Constraint violations for"
+msgstr "Constraintverletzungen für"
+
+#: AKScheduling/views.py:104
+msgid "AKs requiring special attention for"
+msgstr "AKs die besondere Aufmerksamkeit erfordern für"
+
+#: AKScheduling/views.py:150
 msgid "Interest updated"
 msgstr "Interesse aktualisiert"
 
 #: AKScheduling/views.py:157
+msgid "Enter interest"
+msgstr "Interesse eingeben"
+
+#: AKScheduling/views.py:201
 msgid "Wishes"
 msgstr "Wünsche"
 
-#: AKScheduling/views.py:165
+#: AKScheduling/views.py:219
 msgid "Cleanup: Delete unscheduled slots for wishes"
 msgstr "Aufräumen: Noch nicht geplante Slots für Wünsche löschen"
 
-#: AKScheduling/views.py:172
+#: AKScheduling/views.py:226
 #, python-brace-format
 msgid ""
 "The following {count} unscheduled slots of wishes will be deleted:\n"
@@ -235,15 +284,15 @@ msgstr ""
 "\n"
 " {slots}"
 
-#: AKScheduling/views.py:179
+#: AKScheduling/views.py:233
 msgid "Unscheduled slots for wishes successfully deleted"
 msgstr "Noch nicht geplante Slots für Wünsche erfolgreich gelöscht"
 
-#: AKScheduling/views.py:184
+#: AKScheduling/views.py:247
 msgid "Create default availabilities for AKs"
 msgstr "Standardverfügbarkeiten für AKs anlegen"
 
-#: AKScheduling/views.py:191
+#: AKScheduling/views.py:254
 #, python-brace-format
 msgid ""
 "The following {count} AKs don't have any availability information. Create "
@@ -256,16 +305,20 @@ msgstr ""
 "\n"
 " {aks}"
 
-#: AKScheduling/views.py:209
+#: AKScheduling/views.py:274
 #, python-brace-format
 msgid "Could not create default availabilities for AK: {ak}"
 msgstr "Konnte keine Verfügbarkeit anlegen für AK: {ak}"
 
-#: AKScheduling/views.py:214
+#: AKScheduling/views.py:279
 #, python-brace-format
 msgid "Created default availabilities for {count} AKs"
 msgstr "Standardverfügbarkeiten für {count} AKs angelegt"
 
+#: AKScheduling/views.py:290
+msgid "Constraint Violations"
+msgstr "Constraintverletzungen"
+
 #~ msgid "Bitte AK auswählen"
 #~ msgstr "Please sel"
 

AKScheduling/models.py

+# This file mainly contains signal receivers, which follow a very strong interface, having e.g., a sender attribute
+# that is hardly used by us. Nevertheless, to follow the django receiver coding style and since changes might
+# cause issues when loading fixtures or model dumps, it is not wise to replace that attribute with "_".
+# Therefore, the check that finds unused arguments is disabled for this whole file:
+# pylint: disable=unused-argument
+
 from django.db.models.signals import post_save, m2m_changed, pre_delete
 from django.dispatch import receiver
 from django.utils.translation import gettext_lazy as _
 
 from AKModel.availability.models import Availability
-from AKModel.models import AK, AKSlot, Room, Event, AKOwner, ConstraintViolation
+from AKModel.models import AK, AKSlot, Room, Event, ConstraintViolation
 
 
 def update_constraint_violations(new_violations, existing_violations_to_check):
@@ -43,11 +49,15 @@ def update_cv_reso_deadline_for_slot(slot):
     :type slot: AKSlot
     """
     event = slot.event
+
+    # Update only if reso_deadline exists
+    # if event was changed and reso_deadline is removed, CVs will be deleted by event changed handler
+    # Update only has to be done for already scheduled slots with reso intention
     if slot.ak.reso and slot.event.reso_deadline and slot.start:
-        # Update only if reso_deadline exists
-        # if event was changed and reso_deadline is removed, CVs will be deleted by event changed handler
         violation_type = ConstraintViolation.ViolationType.AK_AFTER_RESODEADLINE
         new_violations = []
+
+        # Violation?
         if slot.end > event.reso_deadline:
             c = ConstraintViolation(
                 type=violation_type,
@@ -69,38 +79,47 @@ def check_capacity_for_slot(slot: AKSlot):
     :return: Violation (if any) or None
     :rtype: ConstraintViolation or None
     """
-    if slot.room:
-        if slot.room.capacity >= 0:
-            if slot.room.capacity < slot.ak.interest:
-                c = ConstraintViolation(
-                    type=ConstraintViolation.ViolationType.ROOM_CAPACITY_EXCEEDED,
-                    level=ConstraintViolation.ViolationLevel.VIOLATION,
-                    event=slot.event,
-                    room=slot.room,
-                    comment=_("Not enough space for AK interest (Interest: %(interest)d, Capacity: %(capacity)d)")
-                            % {'interest': slot.ak.interest, 'capacity': slot.room.capacity},
-                )
-                c.ak_slots_tmp.add(slot)
-                c.aks_tmp.add(slot.ak)
-                return c
-            elif slot.room.capacity < slot.ak.interest + 5 or slot.room.capacity < slot.ak.interest * 1.25:
-                c = ConstraintViolation(
-                    type=ConstraintViolation.ViolationType.ROOM_CAPACITY_EXCEEDED,
-                    level=ConstraintViolation.ViolationLevel.WARNING,
-                    event=slot.event,
-                    room=slot.room,
-                    comment=_("Space is too close to AK interest (Interest: %(interest)d, Capacity: %(capacity)d)")
-                            % {'interest': slot.ak.interest, 'capacity': slot.room.capacity}
-                )
-                c.ak_slots_tmp.add(slot)
-                c.aks_tmp.add(slot.ak)
-                return c
-        return None
+
+    # If slot is scheduled in a room and interest was specified
+    if slot.room and slot.room.capacity >= 0 and slot.ak.interest >= 0:
+        # Create a violation if interest exceeds room capacity
+        if slot.room.capacity < slot.ak.interest:
+            c = ConstraintViolation(
+                type=ConstraintViolation.ViolationType.ROOM_CAPACITY_EXCEEDED,
+                level=ConstraintViolation.ViolationLevel.VIOLATION,
+                event=slot.event,
+                room=slot.room,
+                comment=_("Not enough space for AK interest (Interest: %(interest)d, Capacity: %(capacity)d)")
+                        % {'interest': slot.ak.interest, 'capacity': slot.room.capacity},
+            )
+            c.ak_slots_tmp.add(slot)
+            c.aks_tmp.add(slot.ak)
+            return c
+
+        # Create a warning if interest is close to room capacity
+        if slot.room.capacity < slot.ak.interest + 5 or slot.room.capacity < slot.ak.interest * 1.25:
+            c = ConstraintViolation(
+                type=ConstraintViolation.ViolationType.ROOM_CAPACITY_EXCEEDED,
+                level=ConstraintViolation.ViolationLevel.WARNING,
+                event=slot.event,
+                room=slot.room,
+                comment=_("Space is too close to AK interest (Interest: %(interest)d, Capacity: %(capacity)d)")
+                        % {'interest': slot.ak.interest, 'capacity': slot.room.capacity}
+            )
+            c.ak_slots_tmp.add(slot)
+            c.aks_tmp.add(slot.ak)
+            return c
+
+    return None
 
 
 @receiver(post_save, sender=AK)
 def ak_changed_handler(sender, instance: AK, **kwargs):
-    # Changes might affect: Reso intention, Category, Interest
+    """
+    Signal receiver: Check for violations after AK changed
+
+    Changes might affect: Reso intention, Category, Interest
+    """
     # TODO Reso intention changes
 
     # Check room capacities
@@ -118,14 +137,12 @@ def ak_changed_handler(sender, instance: AK, **kwargs):
 @receiver(m2m_changed, sender=AK.owners.through)
 def ak_owners_changed_handler(sender, instance: AK, action: str, **kwargs):
     """
-    Owners of AK changed
+    Signal receiver: Owners of AK changed
     """
     # Only signal after change (post_add, post_delete, post_clear) are relevant
     if not action.startswith("post"):
         return
 
-    # print(f"{instance} changed")
-
     event = instance.event
 
     # Owner(s) changed: Might affect multiple AKs by the same owner(s) at the same time
@@ -157,8 +174,6 @@ def ak_owners_changed_handler(sender, instance: AK, action: str, **kwargs):
                             c.ak_slots_tmp.add(other_slot)
                             new_violations.append(c)
 
-        #print(f"{owner} has the following conflicts: {new_violations}")
-
     # ... and compare to/update list of existing violations of this type
     # belonging to the AK that was recently changed (important!)
     existing_violations_to_check = list(instance.constraintviolation_set.filter(type=violation_type))
@@ -169,14 +184,12 @@ def ak_owners_changed_handler(sender, instance: AK, action: str, **kwargs):
 @receiver(m2m_changed, sender=AK.conflicts.through)
 def ak_conflicts_changed_handler(sender, instance: AK, action: str, **kwargs):
     """
-    Conflicts of AK changed
+    Signal receiver: Conflicts of AK changed
     """
     # Only signal after change (post_add, post_delete, post_clear) are relevant
     if not action.startswith("post"):
         return
 
-    # print(f"{instance} changed")
-
     event = instance.event
 
     # Conflict(s) changed: Might affect multiple AKs that are conflicts of each other
@@ -186,6 +199,7 @@ def ak_conflicts_changed_handler(sender, instance: AK, action: str, **kwargs):
     slots_of_this_ak: [AKSlot] = instance.akslot_set.filter(start__isnull=False)
     conflicts_of_this_ak: [AK] = instance.conflicts.all()
 
+    # Loop over all existing conflicts
     for ak in conflicts_of_this_ak:
         if ak != instance:
             for other_slot in ak.akslot_set.filter(start__isnull=False):
@@ -203,8 +217,6 @@ def ak_conflicts_changed_handler(sender, instance: AK, action: str, **kwargs):
                         c.ak_slots_tmp.add(other_slot)
                         new_violations.append(c)
 
-        # print(f"{instance} has the following conflicts: {new_violations}")
-
     # ... and compare to/update list of existing violations of this type
     # belonging to the AK that was recently changed (important!)
     existing_violations_to_check = list(instance.constraintviolation_set.filter(type=violation_type))
@@ -215,23 +227,22 @@ def ak_conflicts_changed_handler(sender, instance: AK, action: str, **kwargs):
 @receiver(m2m_changed, sender=AK.prerequisites.through)
 def ak_prerequisites_changed_handler(sender, instance: AK, action: str, **kwargs):
     """
-    Prerequisites of AK changed
+    Signal receiver: Prerequisites of AK changed
     """
     # Only signal after change (post_add, post_delete, post_clear) are relevant
     if not action.startswith("post"):
         return
 
-    # print(f"{instance} changed")
-
     event = instance.event
 
-    # Conflict(s) changed: Might affect multiple AKs that are conflicts of each other
+    # Prerequisite(s) changed: Might affect multiple AKs that should have a certain order
     violation_type = ConstraintViolation.ViolationType.AK_BEFORE_PREREQUISITE
     new_violations = []
 
     slots_of_this_ak: [AKSlot] = instance.akslot_set.filter(start__isnull=False)
     prerequisites_of_this_ak: [AK] = instance.prerequisites.all()
 
+    # Loop over all prerequisites
     for ak in prerequisites_of_this_ak:
         if ak != instance:
             for other_slot in ak.akslot_set.filter(start__isnull=False):
@@ -249,8 +260,6 @@ def ak_prerequisites_changed_handler(sender, instance: AK, action: str, **kwargs
                         c.ak_slots_tmp.add(other_slot)
                         new_violations.append(c)
 
-        # print(f"{instance} has the following conflicts: {new_violations}")
-
     # ... and compare to/update list of existing violations of this type
     # belonging to the AK that was recently changed (important!)
     existing_violations_to_check = list(instance.constraintviolation_set.filter(type=violation_type))
@@ -261,14 +270,12 @@ def ak_prerequisites_changed_handler(sender, instance: AK, action: str, **kwargs
 @receiver(m2m_changed, sender=AK.requirements.through)
 def ak_requirements_changed_handler(sender, instance: AK, action: str, **kwargs):
     """
-    Requirements of AK changed
+    Signal receiver: Requirements of AK changed
     """
     # Only signal after change (post_add, post_delete, post_clear) are relevant
     if not action.startswith("post"):
         return
 
-    # print(f"{instance} changed")
-
     event = instance.event
 
     # Requirement(s) changed: Might affect slots and rooms
@@ -281,6 +288,8 @@ def ak_requirements_changed_handler(sender, instance: AK, action: str, **kwargs)
     for slot in slots_of_this_ak:
 
         room = slot.room
+        if room is None:
+            continue
         room_requirements = room.properties.all()
 
         for requirement in instance.requirements.all():
@@ -298,8 +307,6 @@ def ak_requirements_changed_handler(sender, instance: AK, action: str, **kwargs)
                 c.ak_slots_tmp.add(slot)
                 new_violations.append(c)
 
-    # print(f"{instance} has the following conflicts: {new_violations}")
-
     # ... and compare to/update list of existing violations of this type
     # belonging to the AK that was recently changed (important!)
     existing_violations_to_check = list(instance.constraintviolation_set.filter(type=violation_type))
@@ -309,8 +316,13 @@ def ak_requirements_changed_handler(sender, instance: AK, action: str, **kwargs)
 
 @receiver(post_save, sender=AKSlot)
 def akslot_changed_handler(sender, instance: AKSlot, **kwargs):
-    # Changes might affect: Duplicate parallel, Two in room, Resodeadline
-    # print(f"{sender} changed")
+    """
+    Signal receiver: AKSlot changed
+
+    Changes might affect: Duplicate parallel, Two in room, Resodeadline
+    """
+    # TODO Consider rewriting this very long and complex method to resolve several (style) issues:
+    # pylint: disable=too-many-nested-blocks,too-many-locals,too-many-branches,too-many-statements
     event = instance.event
 
     # == Check for two parallel slots by one of the owners ==
@@ -341,8 +353,6 @@ def akslot_changed_handler(sender, instance: AKSlot, **kwargs):
                             c.ak_slots_tmp.add(other_slot)
                             new_violations.append(c)
 
-            # print(f"{owner} has the following conflicts: {new_violations}")
-
     # ... and compare to/update list of existing violations of this type
     # belonging to the AK that was recently changed (important!)
     existing_violations_to_check = list(instance.constraintviolation_set.filter(type=violation_type))
@@ -355,8 +365,8 @@ def akslot_changed_handler(sender, instance: AKSlot, **kwargs):
     new_violations = []
 
     # For all slots in this room...
-    if instance.room:
-        for other_slot in instance.room.akslot_set.all():
+    if instance.room and instance.start:
+        for other_slot in instance.room.akslot_set.filter(start__isnull=False):
             if other_slot != instance:
                 # ... find overlapping slots...
                 if instance.overlaps(other_slot):
@@ -373,8 +383,6 @@ def akslot_changed_handler(sender, instance: AKSlot, **kwargs):
                     c.ak_slots_tmp.add(other_slot)
                     new_violations.append(c)
 
-        # print(f"Multiple slots in room {instance.room}: {new_violations}")
-
     # ... and compare to/update list of existing violations of this type
     # belonging to the slot that was recently changed (important!)
     existing_violations_to_check = list(instance.constraintviolation_set.filter(type=violation_type))
@@ -437,8 +445,6 @@ def akslot_changed_handler(sender, instance: AKSlot, **kwargs):
             c.ak_slots_tmp.add(instance)
             new_violations.append(c)
 
-    # print(f"{instance.ak} has the following slots outside availabilities: {new_violations}")
-
     # ... and compare to/update list of existing violations of this type
     # belonging to the AK that was recently changed (important!)
     existing_violations_to_check = list(instance.constraintviolation_set.filter(type=violation_type))
@@ -470,8 +476,6 @@ def akslot_changed_handler(sender, instance: AKSlot, **kwargs):
                 c.ak_slots_tmp.add(instance)
                 new_violations.append(c)
 
-    # print(f"{instance} has the following conflicts: {new_violations}")
-
     # ... and compare to/update list of existing violations of this type
     # belonging to the AK that was recently changed (important!)
     existing_violations_to_check = list(instance.constraintviolation_set.filter(type=violation_type))
@@ -502,8 +506,6 @@ def akslot_changed_handler(sender, instance: AKSlot, **kwargs):
                         c.ak_slots_tmp.add(other_slot)
                         new_violations.append(c)
 
-            # print(f"{instance} has the following conflicts: {new_violations}")
-
     # ... and compare to/update list of existing violations of this type
     # belonging to the AK that was recently changed (important!)
     existing_violations_to_check = list(instance.ak.constraintviolation_set.filter(type=violation_type))
@@ -534,8 +536,6 @@ def akslot_changed_handler(sender, instance: AKSlot, **kwargs):
                         c.ak_slots_tmp.add(other_slot)
                         new_violations.append(c)
 
-            # print(f"{instance} has the following conflicts: {new_violations}")
-
     # ... and compare to/update list of existing violations of this type
     # belonging to the AK that was recently changed (important!)
     existing_violations_to_check = list(instance.ak.constraintviolation_set.filter(type=violation_type))
@@ -547,15 +547,21 @@ def akslot_changed_handler(sender, instance: AKSlot, **kwargs):
     new_violations = [cv] if cv is not None else []
 
     # Compare to/update list of existing violations of this type for this slot
-    existing_violations_to_check = list(instance.constraintviolation_set.filter(type=ConstraintViolation.ViolationType.ROOM_CAPACITY_EXCEEDED))
+    existing_violations_to_check = list(
+        instance.constraintviolation_set.filter(type=ConstraintViolation.ViolationType.ROOM_CAPACITY_EXCEEDED)
+    )
     update_constraint_violations(new_violations, existing_violations_to_check)
 
 
 @receiver(pre_delete, sender=AKSlot)
 def akslot_deleted_handler(sender, instance: AKSlot, **kwargs):
-    # Manually clean up or remove constraint violations that belong to this slot since there is no cascade deletion
-    # for many2many relationships. Explicitly listening for AK deletion signals is not necessary since they will
-    # transitively trigger this signal and we always set both AK and AKSlot references in a constraint violation
+    """
+    Signal receiver: AKSlot deleted
+
+    Manually clean up or remove constraint violations that belong to this slot since there is no cascade deletion
+    for many2many relationships. Explicitly listening for AK deletion signals is not necessary since they will
+    transitively trigger this signal and we always set both AK and AKSlot references in a constraint violation
+    """
     # print(f"{instance} deleted")
 
     for cv in instance.constraintviolation_set.all():
@@ -566,8 +572,11 @@ def akslot_deleted_handler(sender, instance: AKSlot, **kwargs):
 
 @receiver(post_save, sender=Room)
 def room_changed_handler(sender, instance: Room, **kwargs):
-    # Changes might affect: Room size
+    """
+    Signal receiver: Room changed
 
+    Changes might affect: Room size
+    """
     # Check room capacities
     violation_type = ConstraintViolation.ViolationType.ROOM_CAPACITY_EXCEEDED
     new_violations = []
@@ -583,24 +592,23 @@ def room_changed_handler(sender, instance: Room, **kwargs):
 @receiver(m2m_changed, sender=Room.properties.through)
 def room_requirements_changed_handler(sender, instance: Room, action: str, **kwargs):
     """
-    Requirements of room changed
+    Signal Receiver: Requirements of room changed
     """
     # Only signal after change (post_add, post_delete, post_clear) are relevant
     if not action.startswith("post"):
         return
 
-    # print(f"{instance} changed")
-
-    event = instance.event
-
+    # event = instance.event
     # TODO React to changes
 
 
 @receiver(post_save, sender=Availability)
 def availability_changed_handler(sender, instance: Availability, **kwargs):
-    # Changes might affect: category availability, AK availability, Room availability
-    # print(f"{instance} changed")
+    """
+    Signal receiver: Availalability changed
 
+    Changes might affect: category availability, AK availability, Room availability
+    """
     event = instance.event
 
     # An AK's availability changed: Might affect AK slots scheduled outside the permitted time
@@ -627,8 +635,6 @@ def availability_changed_handler(sender, instance: Availability, **kwargs):
                 c.ak_slots_tmp.add(slot)
                 new_violations.append(c)
 
-        # print(f"{instance.ak} has the following slots outside availabilities: {new_violations}")
-
         # ... and compare to/update list of existing violations of this type
         # belonging to the AK that was recently changed (important!)
         existing_violations_to_check = list(instance.ak.constraintviolation_set.filter(type=violation_type))
@@ -638,7 +644,12 @@ def availability_changed_handler(sender, instance: Availability, **kwargs):
 
 @receiver(post_save, sender=Event)
 def event_changed_handler(sender, instance: Event, **kwargs):
-    # == Check for reso ak after reso deadline (which might have changed) ==
+    """
+    Signal receiver: Event changed
+
+    Changes might affect: Reso deadline
+    """
+    # Check for reso ak after reso deadline (which might have changed)
     if instance.reso_deadline:
         for slot in instance.akslot_set.filter(start__isnull=False, ak__reso=True):
             update_cv_reso_deadline_for_slot(slot)