Improve time-related stuff

Add created_at to all models
Add modified_at to Session
Get rid of custom now() function
Make sure aware datetime is used everywhere

CHANGELOG.md

@@ -1,3 +1,9 @@
+## Unreleased
+
+## Improved
+* game overview: improve how editions and purchases are displayed
+* add purchase: only allow choosing purchases of selected edition
+
 ## 1.5.1 / 2023-11-14 21:10+01:00
 
 ## Improved

common/input.css

@@ -72,6 +72,10 @@ textarea:disabled {
   @apply dark:bg-slate-700 dark:text-slate-400;
 }
 
+.errorlist {
+  @apply mt-4 mb-1 pl-3 py-2 bg-red-600 text-slate-200 w-[300px];
+}
+
 @media screen and (min-width: 768px) {
   form input,
   select,

common/time.py

@@ -1,12 +1,5 @@
 import re
-from datetime import datetime, timedelta
+from datetime import timedelta
-from zoneinfo import ZoneInfo
-
-from django.conf import settings
-
-
-def now() -> datetime:
-    return datetime.now(ZoneInfo(settings.TIME_ZONE))
 
 
 def _safe_timedelta(duration: timedelta | int | None):

games/forms.py

@@ -1,5 +1,5 @@
 from django import forms
-
+from django.urls import reverse
 from games.models import Game, Platform, Purchase, Session, Edition, Device
 
 custom_date_widget = forms.DateInput(attrs={"type": "date"})
@@ -50,6 +50,20 @@ class IncludePlatformSelect(forms.Select):
 
 
 class PurchaseForm(forms.ModelForm):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        # Automatically update related_purchase <select/>
+        # to only include purchases of the selected edition.
+        related_purchase_by_edition_url = reverse("related_purchase_by_edition")
+        self.fields["edition"].widget.attrs.update(
+            {
+                "hx-get": related_purchase_by_edition_url,
+                "hx-target": "#id_related_purchase",
+                "hx-swap": "outerHTML",
+            }
+        )
+
     edition = EditionChoiceField(
         queryset=Edition.objects.order_by("sort_name"),
         widget=IncludePlatformSelect(attrs={"autoselect": "autoselect"}),
@@ -58,7 +72,8 @@ class PurchaseForm(forms.ModelForm):
     related_purchase = forms.ModelChoiceField(
         queryset=Purchase.objects.filter(type=Purchase.GAME).order_by(
             "edition__sort_name"
-        )
+        ),
+        required=False,
     )
 
     class Meta:
@@ -82,6 +97,27 @@ class PurchaseForm(forms.ModelForm):
             "name",
         ]
 
+    def clean(self):
+        cleaned_data = super().clean()
+        purchase_type = cleaned_data.get("type")
+        related_purchase = cleaned_data.get("related_purchase")
+        name = cleaned_data.get("name")
+
+        # Set the type on the instance to use get_type_display()
+        # This is safe because we're not saving the instance.
+        self.instance.type = purchase_type
+
+        if purchase_type != Purchase.GAME:
+            type_display = self.instance.get_type_display()
+            if not related_purchase:
+                self.add_error(
+                    "related_purchase",
+                    f"{type_display} must have a related purchase.",
+                )
+            if not name:
+                self.add_error("name", f"{type_display} must have a name.")
+        return cleaned_data
+
 
 class IncludeNameSelect(forms.Select):
     def create_option(self, name, value, *args, **kwargs):

games/migrations/0029_alter_purchase_related_purchase.py

@@ -0,0 +1,26 @@
+# Generated by Django 4.1.5 on 2023-11-14 21:19
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("games", "0028_purchase_name"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="purchase",
+            name="related_purchase",
+            field=models.ForeignKey(
+                blank=True,
+                default=None,
+                null=True,
+                on_delete=django.db.models.deletion.SET_NULL,
+                related_name="related_purchases",
+                to="games.purchase",
+            ),
+        ),
+    ]

games/migrations/0030_alter_purchase_name.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.1.5 on 2023-11-15 12:04
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("games", "0029_alter_purchase_related_purchase"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="purchase",
+            name="name",
+            field=models.CharField(blank=True, default="", max_length=255, null=True),
+        ),
+    ]

games/migrations/0031_device_created_at_edition_created_at_game_created_at_and_more.py

@@ -0,0 +1,44 @@
+# Generated by Django 4.1.5 on 2023-11-15 13:51
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("games", "0030_alter_purchase_name"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="device",
+            name="created_at",
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+        migrations.AddField(
+            model_name="edition",
+            name="created_at",
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+        migrations.AddField(
+            model_name="game",
+            name="created_at",
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+        migrations.AddField(
+            model_name="platform",
+            name="created_at",
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+        migrations.AddField(
+            model_name="purchase",
+            name="created_at",
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+        migrations.AddField(
+            model_name="session",
+            name="created_at",
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+    ]

games/migrations/0032_alter_session_options_session_modified_at_and_more.py

@@ -0,0 +1,52 @@
+# Generated by Django 4.1.5 on 2023-11-15 18:02
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("games", "0031_device_created_at_edition_created_at_game_created_at_and_more"),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name="session",
+            options={"get_latest_by": "timestamp_start"},
+        ),
+        migrations.AddField(
+            model_name="session",
+            name="modified_at",
+            field=models.DateTimeField(auto_now=True),
+        ),
+        migrations.AlterField(
+            model_name="device",
+            name="created_at",
+            field=models.DateTimeField(auto_now_add=True),
+        ),
+        migrations.AlterField(
+            model_name="edition",
+            name="created_at",
+            field=models.DateTimeField(auto_now_add=True),
+        ),
+        migrations.AlterField(
+            model_name="game",
+            name="created_at",
+            field=models.DateTimeField(auto_now_add=True),
+        ),
+        migrations.AlterField(
+            model_name="platform",
+            name="created_at",
+            field=models.DateTimeField(auto_now_add=True),
+        ),
+        migrations.AlterField(
+            model_name="purchase",
+            name="created_at",
+            field=models.DateTimeField(auto_now_add=True),
+        ),
+        migrations.AlterField(
+            model_name="session",
+            name="created_at",
+            field=models.DateTimeField(auto_now_add=True),
+        ),
+    ]

games/models.py

@@ -1,10 +1,8 @@
-from datetime import datetime, timedelta
-from typing import Any
-from zoneinfo import ZoneInfo
-
 from common.time import format_duration
-from django.conf import settings
+from datetime import timedelta
 from django.db import models
+from django.core.exceptions import ValidationError
+from django.utils import timezone
 from django.db.models import F, Manager, Sum
 
 
@@ -13,6 +11,7 @@ class Game(models.Model):
     sort_name = models.CharField(max_length=255, null=True, blank=True, default=None)
     year_released = models.IntegerField(null=True, blank=True, default=None)
     wikidata = models.CharField(max_length=50, null=True, blank=True, default=None)
+    created_at = models.DateTimeField(auto_now_add=True)
 
     def __str__(self):
         return self.name
@@ -43,6 +42,7 @@ class Edition(models.Model):
     )
     year_released = models.IntegerField(null=True, blank=True, default=None)
     wikidata = models.CharField(max_length=50, null=True, blank=True, default=None)
+    created_at = models.DateTimeField(auto_now_add=True)
 
     def __str__(self):
         return self.sort_name
@@ -120,12 +120,16 @@ class Purchase(models.Model):
         max_length=2, choices=OWNERSHIP_TYPES, default=DIGITAL
     )
     type = models.CharField(max_length=255, choices=TYPES, default=GAME)
-    name = models.CharField(
+    name = models.CharField(max_length=255, default="", null=True, blank=True)
-        max_length=255, default="Unknown Name", null=True, blank=True
-    )
     related_purchase = models.ForeignKey(
-        "Purchase", on_delete=models.SET_NULL, default=None, null=True, blank=True
+        "Purchase",
+        on_delete=models.SET_NULL,
+        default=None,
+        null=True,
+        blank=True,
+        related_name="related_purchases",
     )
+    created_at = models.DateTimeField(auto_now_add=True)
 
     def __str__(self):
         additional_info = [
@@ -144,12 +148,17 @@ class Purchase(models.Model):
     def save(self, *args, **kwargs):
         if self.type == Purchase.GAME:
             self.name = ""
+        elif self.type != Purchase.GAME and not self.related_purchase:
+            raise ValidationError(
+                f"{self.get_type_display()} must have a related purchase."
+            )
         super().save(*args, **kwargs)
 
 
 class Platform(models.Model):
     name = models.CharField(max_length=255)
     group = models.CharField(max_length=255, null=True, blank=True, default=None)
+    created_at = models.DateTimeField(auto_now_add=True)
 
     def __str__(self):
         return self.name
@@ -167,6 +176,9 @@ class SessionQuerySet(models.QuerySet):
 
 
 class Session(models.Model):
+    class Meta:
+        get_latest_by = "timestamp_start"
+
     purchase = models.ForeignKey("Purchase", on_delete=models.CASCADE)
     timestamp_start = models.DateTimeField()
     timestamp_end = models.DateTimeField(blank=True, null=True)
@@ -180,6 +192,8 @@ class Session(models.Model):
         default=None,
     )
     note = models.TextField(blank=True, null=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+    modified_at = models.DateTimeField(auto_now=True)
 
     objects = SessionQuerySet.as_manager()
 
@@ -188,10 +202,10 @@ class Session(models.Model):
         return f"{str(self.purchase)} {str(self.timestamp_start.date())} ({self.duration_formatted()}{mark})"
 
     def finish_now(self):
-        self.timestamp_end = datetime.now(ZoneInfo(settings.TIME_ZONE))
+        self.timestamp_end = timezone.now()
 
     def start_now():
-        self.timestamp_start = datetime.now(ZoneInfo(settings.TIME_ZONE))
+        self.timestamp_start = timezone.now()
 
     def duration_seconds(self) -> timedelta:
         manual = timedelta(0)
@@ -244,6 +258,7 @@ class Device(models.Model):
     ]
     name = models.CharField(max_length=255)
     type = models.CharField(max_length=3, choices=DEVICE_TYPES, default=UNKNOWN)
+    created_at = models.DateTimeField(auto_now_add=True)
 
     def __str__(self):
         return f"{self.name} ({self.get_type_display()})"

games/static/base.css

@@ -1231,6 +1231,19 @@ textarea:disabled) {
   color: rgb(148 163 184 / var(--tw-text-opacity));
 }
 
+.errorlist {
+  margin-top: 1rem;
+  margin-bottom: 0.25rem;
+  width: 300px;
+  --tw-bg-opacity: 1;
+  background-color: rgb(220 38 38 / var(--tw-bg-opacity));
+  padding-top: 0.5rem;
+  padding-bottom: 0.5rem;
+  padding-left: 0.75rem;
+  --tw-text-opacity: 1;
+  color: rgb(226 232 240 / var(--tw-text-opacity));
+}
+
 @media screen and (min-width: 768px) {
   form input,
   select,
@@ -1429,6 +1442,10 @@ th label {
     padding-right: 1rem;
   }
 
+  .sm\:pl-12 {
+    padding-left: 3rem;
+  }
+
   .sm\:pl-2 {
     padding-left: 0.5rem;
   }

games/templates/base.html

@@ -13,7 +13,7 @@
         <link rel="stylesheet" href="{% static 'base.css' %}" />
     </head>
     
-    <body class="dark">
+    <body class="dark" hx-indicator="#indicator">
         <img id="indicator" src="{% static 'icons/loading.png' %}" class="absolute right-3 top-3 animate-spin htmx-indicator" />
         <div class="dark:bg-gray-800 min-h-screen">
             <nav class="mb-4 bg-white dark:bg-gray-900 border-gray-200 rounded">

games/templates/list_sessions.html

@@ -12,7 +12,6 @@
     id="last-session-start"
     href="{% url 'start_session_same_as_last' last.id %}"
     hx-get="{% url 'start_session_same_as_last' last.id %}"
-    hx-indicator="#indicator"
     hx-swap="afterbegin"
     hx-target=".responsive-table tbody"
     hx-select=".responsive-table tbody tr:first-child"

games/templates/partials/related_purchase_field.html

@@ -0,0 +1 @@
+{{ form.related_purchase }}

games/templates/view_game.html

@@ -13,51 +13,47 @@
             {% include 'components/edit_button.html' with edit_url=edit_url %}
         </h1>
         <h2 class="text-lg my-2 ml-2">
-            {{ total_hours }} <span class="dark:text-slate-500">total</span>
+            {{ hours_sum }} <span class="dark:text-slate-500">total</span>
             {{ session_average }} <span class="dark:text-slate-500">avg</span> 
             ({{ playrange }}) </h2>
         <hr class="border-slate-500">
-        <h1 class="text-3xl mt-4 mb-1">Editions <span class="dark:text-slate-500">({{ editions.count }})</span></h1>
+        <h1 class="text-3xl mt-4 mb-1">Editions <span class="dark:text-slate-500">({{ edition_count }})</span> and Purchases <span class="dark:text-slate-500">({{ purchase_count }})</span></h1>
+
         <ul>
             {% for edition in editions %}
             <li class="sm:pl-2 flex items-center">
                 {{ edition.name }} ({{ edition.platform }}, {{ edition.year_released }})
                 {% if edition.wikidata %}
-                <span class="hidden sm:inline">
+                    <span class="hidden sm:inline">
-                    <a href="https://www.wikidata.org/wiki/{{ edition.wikidata }}">
+                        <a href="https://www.wikidata.org/wiki/{{ edition.wikidata }}">
-                        <img class="inline mx-2 w-6" src="{% static 'icons/wikidata.png' %}"/>
+                            <img class="inline mx-2 w-6" src="{% static 'icons/wikidata.png' %}"/>
-                    </a>
+                        </a>
-                </span>
+                    </span>
                 {% endif %}
                 {% url 'edit_edition' edition.id as edit_url %}
                 {% include 'components/edit_button.html' with edit_url=edit_url %}         
             </li>
-            {% endfor %}
+                <ul>
-        </ul>
+                    {% for purchase in edition.game_purchases %}
-        <h1 class="text-3xl mt-4 mb-1">Purchases <span class="dark:text-slate-500">({{ purchases.count }})</span></h1>
+                    <li class="sm:pl-6 flex items-center">
-        <ul>
+                        {{ purchase.get_ownership_type_display }}, {{ purchase.date_purchased | date:"Y" }}, {{ purchase.price }} {{ purchase.price_currency}}
-            {% for purchase in purchases %}
+                        {% url 'edit_purchase' purchase.id as edit_url %}
-            <li class="sm:pl-2 flex items-center">
+                        {% include 'components/edit_button.html' with edit_url=edit_url %}
-                {{ purchase.platform }}
-                ({{ purchase.get_ownership_type_display }}, {{ purchase.date_purchased | date:"Y" }}, {{ purchase.price }} {{ purchase.price_currency}})
-                {% url 'edit_purchase' purchase.id as edit_url %}
-                {% include 'components/edit_button.html' with edit_url=edit_url %}
-                {% if purchase.related_purchases %}
-                    <li>
-                        <ul>
-                            {% for related_purchase in purchase.related_purchases %}
-                                <li class="sm:pl-6 flex items-center">
-                                    {{ related_purchase.name}} ({{ related_purchase.get_type_display }}, {{ related_purchase.date_purchased | date:"Y" }}, {{ related_purchase.price }} {{ related_purchase.price_currency}})
-                                    {% url 'edit_purchase' related_purchase.id as edit_url %}
-                                    {% include 'components/edit_button.html' with edit_url=edit_url %}
-                                </li>
-                            {% endfor %}
-                        </ul>
                     </li>
-                {% endif %}
+                    <ul>
-            </li>
+                        {% for related_purchase in purchase.nongame_related_purchases %}
+                            <li class="sm:pl-12 flex items-center">
+                                {{ related_purchase.name }} ({{ related_purchase.get_type_display }}, {{ purchase.platform }}, {{ related_purchase.date_purchased | date:"Y" }}, {{ related_purchase.price }} {{ related_purchase.price_currency}})
+                                {% url 'edit_purchase' related_purchase.id as edit_url %}
+                                {% include 'components/edit_button.html' with edit_url=edit_url %}
+                            </li>
+                        {% endfor %}
+                    </ul>
+                    {% endfor %}
+                </ul>
             {% endfor %}
         </ul>
+
         <h1 class="text-3xl mt-4 mb-1 flex gap-2 items-center">
             Sessions
             <span class="dark:text-slate-500">

games/urls.py

@@ -44,6 +44,11 @@ urlpatterns = [
         views.add_purchase,
         name="add_purchase_for_edition",
     ),
+    path(
+        "related-purchase-by-edition",
+        views.related_purchase_by_edition,
+        name="related_purchase_by_edition",
+    ),
     path("add-edition/", views.add_edition, name="add_edition"),
     path(
         "add-edition-for-game/<int:game_id>",

games/views.py

@@ -1,12 +1,13 @@
-from common.time import format_duration, now as now_with_tz
+from common.time import format_duration
 from common.utils import safe_division
 from datetime import datetime, timedelta
 from django.conf import settings
-from django.db.models import Sum, F, Count
+from django.db.models import Sum, F, Count, Prefetch
 from django.db.models.functions import TruncDate
 from django.http import HttpRequest, HttpResponse, HttpResponseRedirect
 from django.shortcuts import redirect, render
 from django.urls import reverse
+from django.utils import timezone
 from typing import Callable, Any
 from zoneinfo import ZoneInfo
 
@@ -32,19 +33,15 @@ def model_counts(request):
 
 
 def stats_dropdown_year_range(request):
-    result = {
+    result = {"stats_dropdown_year_range": range(timezone.now().year, 1999, -1)}
-        "stats_dropdown_year_range": range(
-            datetime.now(ZoneInfo(settings.TIME_ZONE)).year, 1999, -1
-        )
-    }
     return result
 
 
 def add_session(request, purchase_id=None):
     context = {}
-    initial = {"timestamp_start": now_with_tz()}
+    initial = {"timestamp_start": timezone.now()}
 
-    last = Session.objects.all().last()
+    last = Session.objects.last()
     if last != None:
         initial["purchase"] = last.purchase
 
@@ -136,44 +133,52 @@ def edit_game(request, game_id=None):
 
 
 def view_game(request, game_id=None):
-    context = {}
     game = Game.objects.get(id=game_id)
-    context["title"] = "View Game"
+    nongame_related_purchases_prefetch = Prefetch(
-    context["game"] = game
+        "related_purchases",
-    context["editions"] = Edition.objects.filter(game_id=game_id)
+        queryset=Purchase.objects.exclude(type=Purchase.GAME),
-    game_purchases = (
+        to_attr="nongame_related_purchases",
-        Purchase.objects.filter(edition__game_id=game_id)
+    )
-        .filter(type=Purchase.GAME)
+    game_purchases_prefetch = Prefetch(
-        .order_by("date_purchased")
+        "purchase_set",
+        queryset=Purchase.objects.filter(type=Purchase.GAME).prefetch_related(
+            nongame_related_purchases_prefetch
+        ),
+        to_attr="game_purchases",
+    )
+    editions = (
+        Edition.objects.filter(game=game)
+        .prefetch_related(game_purchases_prefetch)
+        .order_by("year_released")
     )
-    for purchase in game_purchases:
-        purchase.related_purchases = Purchase.objects.exclude(
-            type=Purchase.GAME
-        ).filter(related_purchase=purchase.id)
 
-    context["purchases"] = game_purchases
+    sessions = Session.objects.filter(purchase__edition__game=game)
-    context["sessions"] = Session.objects.filter(
+    session_count = sessions.count()
-        purchase__edition__game_id=game_id
-    ).order_by("-timestamp_start")
-    context["total_hours"] = float(
-        format_duration(context["sessions"].total_duration_unformatted(), "%2.1H")
-    )
-    context["session_average"] = round(
-        (context["total_hours"]) / int(context["sessions"].count()), 1
-    )
-    # here first and last is flipped
-    # because sessions are ordered from newest to oldest
-    # so the most recent are on top
-    playrange_start = context["sessions"].last().timestamp_start.strftime("%b %Y")
-    playrange_end = context["sessions"].first().timestamp_start.strftime("%b %Y")
 
-    context["playrange"] = (
+    playrange_start = sessions.earliest().timestamp_start.strftime("%b %Y")
+    playrange_end = sessions.latest().timestamp_start.strftime("%b %Y")
+
+    playrange = (
         playrange_start
         if playrange_start == playrange_end
         else f"{playrange_start} — {playrange_end}"
     )
+    total_hours = float(format_duration(sessions.total_duration_unformatted(), "%2.1H"))
+
+    context = {
+        "edition_count": editions.count(),
+        "editions": editions,
+        "game": game,
+        "playrange": playrange,
+        "purchase_count": Purchase.objects.filter(edition__game=game).count(),
+        "session_average": round(total_hours / int(session_count), 1),
+        "session_count": session_count,
+        "sessions_with_notes": sessions.exclude(note=""),
+        "sessions": sessions.order_by("-timestamp_start"),
+        "title": f"Game Overview - {game.name}",
+        "hours_sum": total_hours,
+    }
 
-    context["sessions_with_notes"] = context["sessions"].exclude(note="")
     request.session["return_path"] = request.path
     return render(request, "view_game.html", context)
 
@@ -204,17 +209,22 @@ def edit_edition(request, edition_id=None):
     return render(request, "add.html", context)
 
 
+def related_purchase_by_edition(request):
+    edition_id = request.GET.get("edition")
+    form = PurchaseForm()
+    form.fields["related_purchase"].queryset = Purchase.objects.filter(
+        edition_id=edition_id, type=Purchase.GAME
+    ).order_by("edition__sort_name")
+    return render(request, "partials/related_purchase_field.html", {"form": form})
+
+
 @use_custom_redirect
 def start_game_session(request, game_id: int):
-    last_session = (
+    last_session = Session.objects.filter(purchase__edition__game_id=game_id).latest()
-        Session.objects.filter(purchase__edition__game_id=game_id)
-        .order_by("-timestamp_start")
-        .first()
-    )
     session = SessionForm(
         {
             "purchase": last_session.purchase.id,
-            "timestamp_start": now_with_tz(),
+            "timestamp_start": timezone.now(),
             "device": last_session.device,
         }
     )
@@ -227,7 +237,7 @@ def start_session_same_as_last(request, last_session_id: int):
     session = SessionForm(
         {
             "purchase": last_session.purchase.id,
-            "timestamp_start": now_with_tz(),
+            "timestamp_start": timezone.now(),
             "device": last_session.device,
         }
     )
@@ -277,19 +287,18 @@ def list_sessions(
         context["title"] = "This year"
     else:
         # by default, sort from newest to oldest
-        dataset = Session.objects.all().order_by("-timestamp_start")
+        dataset = Session.objects.order_by("-timestamp_start")
 
     for session in dataset:
         if session.timestamp_end == None and session.duration_manual == timedelta(
             seconds=0
         ):
-            session.timestamp_end = datetime.now(ZoneInfo(settings.TIME_ZONE))
+            session.timestamp_end = timezone.now()
             session.unfinished = True
 
     context["total_duration"] = dataset.total_duration_formatted()
     context["dataset"] = dataset
-    # cannot use dataset[0] here because that might be only partial QuerySet
+    context["last"] = Session.objects.latest()
-    context["last"] = Session.objects.all().order_by("timestamp_start").last()
 
     return render(request, "list_sessions.html", context)
 
@@ -299,7 +308,7 @@ def stats(request, year: int = 0):
     if selected_year:
         return HttpResponseRedirect(reverse("stats_by_year", args=[selected_year]))
     if year == 0:
-        year = now_with_tz().year
+        year = timezone.now().year
     this_year_sessions = Session.objects.filter(timestamp_start__year=year)
     selected_currency = "CZK"
     unique_days = (
@@ -432,7 +441,7 @@ def stats(request, year: int = 0):
 
 def add_purchase(request, edition_id=None):
     context = {}
-    initial = {"date_purchased": now_with_tz()}
+    initial = {"date_purchased": timezone.now()}
 
     if request.method == "POST":
         form = PurchaseForm(request.POST or None, initial=initial)