Optimize queries

AKDashboard/views.py

@@ -18,7 +18,7 @@ class DashboardView(TemplateView):
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
-        context['events'] = Event.objects.filter(public=True)
+        context['events'] = Event.objects.filter(public=True).prefetch_related('dashboardbutton_set')
         return context
 
 
@@ -54,7 +54,7 @@ class DashboardEventView(DetailView):
             # Changes in plan
             if apps.is_installed("AKPlan"):
                 if not context['event'].plan_hidden:
-                    last_changed_slots = AKSlot.objects.filter(event=context['event'], start__isnull=False).order_by('-updated')[
+                    last_changed_slots = AKSlot.objects.select_related('ak').filter(event=context['event'], start__isnull=False).order_by('-updated')[
                                          :int(settings.DASHBOARD_RECENT_MAX)]
                     for changed_slot in last_changed_slots:
                         recent_changes.append({'icon': ('clock', 'far'),

AKModel/models.py

@@ -84,14 +84,14 @@ class Event(models.Model):
         :return: list of category-AK-list-tuples, optionally the additional list of AK wishes
         :rtype: list[(AKCategory, list[AK])] [, list[AK]]
         """
-        categories = self.akcategory_set.all()
+        categories = self.akcategory_set.select_related('event').all()
         categories_with_aks = []
         ak_wishes = []
 
         if wishes_seperately:
             for category in categories:
                 ak_list = []
-                for ak in category.ak_set.all():
+                for ak in category.ak_set.select_related('event').prefetch_related('owners', 'akslot_set').all():
                     if filter(ak):
                         if ak.wish:
                             ak_wishes.append(ak)
@@ -211,6 +211,9 @@ class AKTrack(models.Model):
     def __str__(self):
         return self.name
 
+    def aks_with_category(self):
+        return self.ak_set.select_related('category').all()
+
 
 class AKRequirement(models.Model):
     """ An AKRequirement describes something needed to hold an AK, e.g. infrastructure.
@@ -291,7 +294,7 @@ class AK(models.Model):
     @property
     def details(self):
         from AKModel.availability.models import Availability
-        availabilities = ', \n'.join(f'{a.simplified}' for a in Availability.objects.filter(ak=self))
+        availabilities = ', \n'.join(f'{a.simplified}' for a in Availability.objects.select_related('event').filter(ak=self))
         return f"""{self.name}{" (R)" if self.reso else ""}:
         
         {self.owners_list}
@@ -307,7 +310,7 @@ class AK(models.Model):
 
     @property
     def durations_list(self):
-        return ", ".join(str(slot.duration_simplified) for slot in self.akslot_set.all())
+        return ", ".join(str(slot.duration_simplified) for slot in self.akslot_set.select_related('event').all())
 
     @property
     def wish(self):
@@ -590,7 +593,7 @@ class ConstraintViolation(models.Model):
     @property
     def _ak_slots_str(self):
         if self.pk and self.pk > 0:
-            return ', '.join(str(a) for a in self.ak_slots.all())
+            return ', '.join(str(a) for a in self.ak_slots.select_related('event').all())
         return ', '.join(str(a) for a in self.ak_slots_tmp)
 
     def save(self, *args, **kwargs):

AKScheduling/api.py

@@ -36,7 +36,7 @@ class EventsView(LoginRequiredMixin, EventSlugMixin, ListView):
     model = AKSlot
 
     def get_queryset(self):
-        return super().get_queryset().filter(event=self.event, room__isnull=False)
+        return super().get_queryset().select_related('ak').filter(event=self.event, room__isnull=False)
 
     def render_to_response(self, context, **response_kwargs):
         return JsonResponse(
@@ -149,4 +149,4 @@ class ConstraintViolationsViewSet(EventSlugMixin, viewsets.ModelViewSet):
         return get_object_or_404(ConstraintViolation, pk=self.kwargs["pk"])
 
     def get_queryset(self):
-        return ConstraintViolation.objects.filter(event=self.event).order_by('manually_resolved', '-type', '-timestamp')
+        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/templates/admin/AKScheduling/manage_tracks.html

@@ -228,7 +228,7 @@
           </div>
           <div class="card-body">
             <ul data-track-id="{{ track.pk }}" data-name="{{ track }}" data-sync="true" class="ak-list">
-                {% for ak in track.ak_set.all %}
+                {% for ak in track.aks_with_category %}
                     <li data-ak-id="{{ ak.pk }}" data-toggle="tooltip" data-placement="top" title="">
                         {{ ak.name }} ({{ ak.category }})
                     </li>

AKScheduling/views.py

@@ -31,7 +31,7 @@ class SchedulingAdminView(AdminViewMixin, FilterByEventSlugMixin, ListView):
     context_object_name = "slots_unscheduled"
 
     def get_queryset(self):
-        return super().get_queryset().filter(start__isnull=True).select_related().order_by('ak__track')
+        return super().get_queryset().filter(start__isnull=True).select_related('event', 'ak').order_by('ak__track')
 
     def get_context_data(self, *, object_list=None, **kwargs):
         context = super().get_context_data(object_list=object_list, **kwargs)
@@ -53,7 +53,7 @@ class TrackAdminView(AdminViewMixin, FilterByEventSlugMixin, ListView):
 
     def get_context_data(self, *, object_list=None, **kwargs):
         context = super().get_context_data(object_list=object_list, **kwargs)
-        context["aks_without_track"] = self.event.ak_set.filter(track=None)
+        context["aks_without_track"] = self.event.ak_set.select_related('category').filter(track=None)
         return context
 
 
@@ -129,10 +129,10 @@ class InterestEnteringAdminView(SuccessMessageMixin, AdminViewMixin, EventSlugMi
 
         # Find other AK wishes (regardless of the category)...
         if context['ak'].wish:
-            other_aks = [ak for ak in context['event'].ak_set.all() if ak.wish]
+            other_aks = [ak for ak in context['event'].ak_set.prefetch_related('owners').all() if ak.wish]
         # or other AKs of this category
         else:
-            other_aks = [ak for ak in context['ak'].category.ak_set.all() if not ak.wish]
+            other_aks = [ak for ak in context['ak'].category.ak_set.prefetch_related('owners').all() if not ak.wish]
 
         for other_ak in other_aks:
             if next_is_next:
@@ -143,9 +143,9 @@ class InterestEnteringAdminView(SuccessMessageMixin, AdminViewMixin, EventSlugMi
                 next_is_next = True
             last_ak = other_ak
 
-        for category in context['event'].akcategory_set.all():
+        for category in context['event'].akcategory_set.prefetch_related('ak_set').all():
             aks_for_category = []
-            for ak in category.ak_set.all():
+            for ak in category.ak_set.prefetch_related('owners').all():
                 if ak.wish:
                     ak_wishes.append(ak)
                 else:

AKSubmission/views.py

@@ -32,7 +32,7 @@ class AKOverviewView(FilterByEventSlugMixin, ListView):
     wishes_as_category = False
 
     def filter_aks(self, context, category):
-        return category.ak_set.all()
+        return category.ak_set.select_related('event').prefetch_related('owners').all()
 
     def get_active_category_name(self, context):
         return context["categories_with_aks"][0][0].name
@@ -126,6 +126,9 @@ class AKDetailView(EventSlugMixin, DetailView):
     context_object_name = "ak"
     template_name = "AKSubmission/ak_detail.html"
 
+    def get_queryset(self):
+        return super().get_queryset().select_related('event').prefetch_related('owners')
+
     def get_context_data(self, *, object_list=None, **kwargs):
         context = super().get_context_data(object_list=object_list, **kwargs)
         context["availabilities"] = Availability.objects.filter(ak=context["ak"])
@@ -136,7 +139,7 @@ class AKDetailView(EventSlugMixin, DetailView):
         context["featured_slot_type"] = "NONE"
         if apps.is_installed("AKPlan"):
             in_two_hours = current_timestamp + timedelta(hours=2)
-            slots = context["ak"].akslot_set.filter(start__isnull=False, room__isnull=False)
+            slots = context["ak"].akslot_set.filter(start__isnull=False, room__isnull=False).select_related('room')
             for slot in slots:
                 if slot.end > current_timestamp:
                     if slot.start <= current_timestamp: