Add `on_delete` to ForeignKey and OneToOne fields

program/migrations/0001_initial.py

@@ -130,11 +130,11 @@ class Migration(migrations.Migration):
                 ('automation_id', models.IntegerField(blank=True, null=True, verbose_name='Automation ID', choices=[])),
                 ('created', models.DateTimeField(auto_now_add=True)),
                 ('last_updated', models.DateTimeField(auto_now=True)),
-                ('broadcastformat', models.ForeignKey(related_name='shows', verbose_name='Broadcast format', to='program.BroadcastFormat')),
+                ('broadcastformat', models.ForeignKey(related_name='shows', on_delete=models.CASCADE, verbose_name='Broadcast format', to='program.BroadcastFormat')),
                 ('hosts', models.ManyToManyField(related_name='shows', verbose_name='Hosts', to='program.Host', blank=True)),
                 ('musicfocus', models.ManyToManyField(related_name='shows', verbose_name='Music focus', to='program.MusicFocus', blank=True)),
                 ('owners', models.ManyToManyField(related_name='shows', verbose_name='Owners', to=settings.AUTH_USER_MODEL, blank=True)),
-                ('predecessor', models.ForeignKey(related_name='successors', verbose_name='Predecessor', blank=True, to='program.Show', null=True)),
+                ('predecessor', models.ForeignKey(related_name='successors', on_delete=models.CASCADE, verbose_name='Predecessor', blank=True, to='program.Show', null=True)),
             ],
             options={
                 'ordering': ('slug',),
@@ -182,8 +182,8 @@ class Migration(migrations.Migration):
                 ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
                 ('start', models.DateTimeField(unique=True, verbose_name='Start time')),
                 ('end', models.DateTimeField(verbose_name='End time')),
-                ('programslot', models.ForeignKey(related_name='timeslots', verbose_name='Program slot', to='program.ProgramSlot')),
-                ('show', models.ForeignKey(related_name='timeslots', editable=False, to='program.Show')),
+                ('programslot', models.ForeignKey(related_name='timeslots', on_delete=models.CASCADE, verbose_name='Program slot', to='program.ProgramSlot')),
+                ('show', models.ForeignKey(related_name='timeslots', on_delete=models.CASCADE, editable=False, to='program.Show')),
             ],
             options={
                 'ordering': ('start', 'end'),
@@ -204,22 +204,22 @@ class Migration(migrations.Migration):
         migrations.AddField(
             model_name='programslot',
             name='rrule',
-            field=models.ForeignKey(related_name='programslots', verbose_name='Recurrence rule', to='program.RRule'),
+            field=models.ForeignKey(related_name='programslots', on_delete=models.CASCADE, verbose_name='Recurrence rule', to='program.RRule'),
         ),
         migrations.AddField(
             model_name='programslot',
             name='show',
-            field=models.ForeignKey(related_name='programslots', verbose_name='Show', to='program.Show'),
+            field=models.ForeignKey(related_name='programslots', on_delete=models.CASCADE, verbose_name='Show', to='program.Show'),
         ),
         migrations.AddField(
             model_name='note',
             name='show',
-            field=models.ForeignKey(related_name='notes', editable=False, to='program.Show'),
+            field=models.ForeignKey(related_name='notes', on_delete=models.CASCADE, editable=False, to='program.Show'),
         ),
         migrations.AddField(
             model_name='note',
             name='timeslot',
-            field=models.OneToOneField(verbose_name='Time slot', to='program.TimeSlot'),
+            field=models.OneToOneField(verbose_name='Time slot', on_delete=models.CASCADE, to='program.TimeSlot'),
         ),
         migrations.AlterUniqueTogether(
             name='programslot',