show daily sale on location detail page

billard/templates/billard/location_detail_ajax.html

@@ -1,4 +1,4 @@
-{% load display_client %}
+{% load display_client display_daily_sale %}
 {% if location.clients.all %}
     {% for cli in location.clients.all %}
         {% for i in "12345678" %}
@@ -10,3 +10,8 @@
         <div class="alert alert-danger">Keine Tische angelegt!</div>
     </div>
 {% endif %}
+    <div class="col">
+        <div class="alert alert-warning">
+            {{ location|display_daily_sale }}
+        </div>
+    </div>

billard/templatetags/display_daily_sale.py

@@ -0,0 +1,18 @@
+from django import template
+from billard.models import Accounting
+from datetime import datetime, timedelta
+from django.db.models import Sum
+
+register = template.Library()
+
+
+@register.filter(is_safe=True)
+def display_daily_sale(location):
+    start_date = datetime.now().replace(hour=5, minute=0, second=0, microsecond=0)
+    end_date = start_date + timedelta(days=1)
+    prize__sum = Accounting.objects.filter(billed=True,
+                                         desk__client__location=location,
+                                         account_tst__range=(start_date, end_date)).aggregate(Sum('prize'))
+    if prize__sum['prize__sum'] is None:
+        prize__sum['prize__sum'] = 0
+    return "Tagesumsatz: {0:.2f} EUR".format(prize__sum['prize__sum'])