Dashboard: Verbindungen insgesamt getrennt von eindeutigen Geräten, Geräte-Übersicht ergänzt

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01M8BG6rcfV94au1CrMNQq9E

app/templates/app/dashboard.html

@@ -42,30 +42,39 @@
         </div>
 
         <div class="row g-3 mb-3">
-            <div class="col-6 col-md-3">
+            <div class="col-6 col-md-6">
+                <div class="stat-card text-center">
+                    <div class="stat-value">{{ total_connections }}</div>
+                    <div class="stat-label">Verbindungen insgesamt <small class="text-muted">(alle Pings)</small></div>
+                </div>
+            </div>
+            <div class="col-6 col-md-6">
+                <div class="stat-card text-center">
+                    <div class="stat-value">{{ unique_devices_total }}</div>
+                    <div class="stat-label">Geräte insgesamt <small class="text-muted">(eindeutig)</small></div>
+                </div>
+            </div>
+        </div>
+
+        <div class="row g-3 mb-3">
+            <div class="col-6 col-md-4">
                 <div class="stat-card text-center">
                     <div class="stat-value">{{ devices_today }}</div>
                     <div class="stat-label">Geräte heute</div>
                 </div>
             </div>
-            <div class="col-6 col-md-3">
+            <div class="col-6 col-md-4">
                 <div class="stat-card text-center">
                     <div class="stat-value">{{ devices_7d }}</div>
                     <div class="stat-label">Geräte (7 Tage)</div>
                 </div>
             </div>
-            <div class="col-6 col-md-3">
+            <div class="col-6 col-md-4">
                 <div class="stat-card text-center">
                     <div class="stat-value">{{ devices_30d }}</div>
                     <div class="stat-label">Geräte (30 Tage)</div>
                 </div>
             </div>
-            <div class="col-6 col-md-3">
-                <div class="stat-card text-center">
-                    <div class="stat-value">{{ unique_devices_total }}</div>
-                    <div class="stat-label">Geräte insgesamt</div>
-                </div>
-            </div>
         </div>
 
         <div class="row g-3 mb-3">
@@ -107,8 +116,38 @@
             </p>
         </div>
 
+        <div class="stat-card mb-3">
+            <h5 class="mb-2">Geräte-Übersicht <small class="text-muted">(ein Eintrag pro Gerät, nicht pro Ping)</small></h5>
+            <div style="overflow-x: auto;">
+                <table class="table table-sm table-striped mb-0">
+                    <thead>
+                        <tr>
+                            <th>Gerät</th>
+                            <th>Pings</th>
+                            <th>Erster Kontakt</th>
+                            <th>Letzter Kontakt</th>
+                            <th>Standalone</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        {% for device in device_summary %}
+                        <tr>
+                            <td><code>{{ device.device_id|slice:":8" }}…</code></td>
+                            <td>{{ device.ping_count }}</td>
+                            <td>{{ device.first_seen|date:"d.m.Y H:i" }}</td>
+                            <td>{{ device.last_seen|date:"d.m.Y H:i" }}</td>
+                            <td>{{ device.standalone_any|yesno:"Ja,Nein" }}</td>
+                        </tr>
+                        {% empty %}
+                        <tr><td colspan="5" class="text-muted">Noch keine Daten</td></tr>
+                        {% endfor %}
+                    </tbody>
+                </table>
+            </div>
+        </div>
+
         <div class="stat-card">
-            <h5 class="mb-2">Letzte Signale</h5>
+            <h5 class="mb-2">Letzte Signale <small class="text-muted">(roher Ping-Log, ein Gerät kann hier mehrfach auftauchen)</small></h5>
             <div style="overflow-x: auto;">
                 <table class="table table-sm table-striped mb-0">
                     <thead>

app/views.py

@@ -1,7 +1,7 @@
 import json
 
 from django.contrib.admin.views.decorators import staff_member_required
-from django.db.models import Count
+from django.db.models import Count, Max, Min
 from django.http import JsonResponse
 from django.shortcuts import render, HttpResponse, redirect
 from django.utils import timezone
@@ -102,6 +102,7 @@ def usage_dashboard(request):
     events = UsageEvent.objects.all()
 
     context = {
+        "total_connections": events.count(),
         "unique_devices_total": events.values("device_id").distinct().count(),
         "devices_today": events.filter(created_at__gte=today_start).values("device_id").distinct().count(),
         "devices_7d": events.filter(created_at__gte=now - timedelta(days=7)).values("device_id").distinct().count(),
@@ -109,6 +110,16 @@ def usage_dashboard(request):
         "standalone_count": events.filter(is_standalone=True).values("device_id").distinct().count(),
         "by_platform": events.values("platform").annotate(count=Count("device_id", distinct=True)).order_by("-count"),
         "by_browser": events.values("browser").annotate(count=Count("device_id", distinct=True)).order_by("-count"),
+        "device_summary": (
+            events.values("device_id")
+            .annotate(
+                ping_count=Count("id"),
+                first_seen=Min("created_at"),
+                last_seen=Max("created_at"),
+                standalone_any=Max("is_standalone"),
+            )
+            .order_by("-last_seen")
+        ),
         "recent_events": events[:30],
     }
     return render(request, "app/dashboard.html", context)