fix model dependencies

billard/migrations/0025_auto_20180211_1059.py

@@ -0,0 +1,31 @@
+# Generated by Django 2.0.2 on 2018-02-11 10:59
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('billard', '0024_auto_20180210_1105'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='accounting',
+            name='desk',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='billard.Desk',
+                                    verbose_name='Tisch'),
+        ),
+        migrations.AlterField(
+            model_name='client',
+            name='location',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='clients',
+                                    to='billard.Location', verbose_name='Standort'),
+        ),
+        migrations.AlterField(
+            model_name='desk',
+            name='client',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='desks',
+                                    to='billard.Client', verbose_name='Client'),
+        ),
+    ]

billard/models.py

@@ -49,7 +49,7 @@ class Location(models.Model):
 
 class Client(models.Model):
     uuid = models.UUIDField(unique=True, default=uuid.uuid4, verbose_name="Identifier")
-    location = models.ForeignKey(Location, related_name="clients", verbose_name="Standort", on_delete=models.DO_NOTHING)
+    location = models.ForeignKey(Location, related_name="clients", verbose_name="Standort", on_delete=models.CASCADE)
     report_user = models.ForeignKey(User, blank=True, null=True, verbose_name="Reporting Benutzer",
                                     related_name='reporting_clients', on_delete=models.DO_NOTHING)
 
@@ -62,7 +62,7 @@ class Client(models.Model):
 
 
 class Desk(models.Model):
-    client = models.ForeignKey(Client, verbose_name='Client', related_name='desks', on_delete=models.DO_NOTHING)
+    client = models.ForeignKey(Client, verbose_name='Client', related_name='desks', on_delete=models.CASCADE)
     desk_no = models.IntegerField(verbose_name='Tischnummer')
     name = models.CharField(max_length=32, blank=True, null=True, verbose_name='Tischbezeichnung')
     enabled = models.BooleanField(verbose_name='Tisch aktiv')
@@ -79,7 +79,7 @@ class Desk(models.Model):
 
 
 class Accounting(models.Model):
-    desk = models.ForeignKey(Desk, verbose_name="Tisch", on_delete=models.DO_NOTHING)
+    desk = models.ForeignKey(Desk, verbose_name="Tisch", on_delete=models.CASCADE)
     time_from = models.DateTimeField(verbose_name="Beginn")
     time_to = models.DateTimeField(blank=True, null=True, verbose_name="Ende")
     prize = models.DecimalField(max_digits=6, decimal_places=2, blank=True, null=True, verbose_name="Preis")