Avoid errors when displaying game overview with zero sessions

CHANGELOG.md

@@ -18,6 +18,7 @@
 
 ## Fixed
 * Fix title not being displayed on the Recent sessions page
+* Avoid errors when displaying game overview with zero sessions
 
 ## 1.5.2 / 2024-01-14 21:27+01:00
 

games/templates/view_game.html

@@ -62,6 +62,7 @@
         <h1 class="text-3xl mt-4 mb-1 flex gap-2 items-center">
             Sessions
             <span class="dark:text-slate-500" id="session-count">({{ session_count }})</span>
+{% if latest_session_id %}
             {% url 'view_game_start_session_from_session' latest_session_id as add_session_link %}
             <a
                 class="truncate max-w-xs py-1 px-2 text-xs bg-green-600 hover:bg-green-700 focus:ring-green-500 focus:ring-offset-blue-200 text-white transition ease-in duration-200 text-center font-semibold shadow-md focus:outline-none focus:ring-2 focus:ring-offset-2 rounded-sm"
@@ -72,6 +73,7 @@
                 hx-target="#session-list"
                 hx-swap="afterbegin"
             >New</a>
+{% endif %}
             and Notes <span class="dark:text-slate-500">({{ sessions_with_notes_count }})</span>
         </h1>
         <ul id="session-list">

games/views.py

@@ -27,7 +27,7 @@ from django.utils import timezone
 from django.shortcuts import get_object_or_404
 
 from common.time import format_duration
-from common.utils import safe_division
+from common.utils import safe_division, safe_getattr
 
 from .forms import (
     DeviceForm,
@@ -179,15 +179,20 @@ def view_game(request, game_id=None):
         Session.objects.without_manual().filter(purchase__edition__game=game).count()
     )
 
-    playrange_start = sessions.earliest().timestamp_start.strftime("%b %Y")
+    if sessions:
-    latest_session = sessions.latest()
+        playrange_start = sessions.earliest().timestamp_start.strftime("%b %Y")
-    playrange_end = latest_session.timestamp_start.strftime("%b %Y")
+        latest_session = sessions.latest()
+        playrange_end = latest_session.timestamp_start.strftime("%b %Y")
+
+        playrange = (
+            playrange_start
+            if playrange_start == playrange_end
+            else f"{playrange_start} — {playrange_end}"
+        )
+    else:
+        playrange = "N/A"
+        latest_session = None
 
-    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"))
     total_hours_without_manual = float(
         format_duration(sessions.calculated_duration_unformatted(), "%2.1H")
@@ -209,7 +214,7 @@ def view_game(request, game_id=None):
         "sessions": sessions.order_by("-timestamp_start"),
         "title": f"Game Overview - {game.name}",
         "hours_sum": total_hours,
-        "latest_session_id": latest_session.pk,
+        "latest_session_id": safe_getattr(latest_session, "pk"),
     }
 
     request.session["return_path"] = request.path