add event dependencies

associate AKTrack with an Event
associate AKCategory with an Event
restrict AK requirements to those associated with the same event
restrict AK categories to those associated with the same event

AKModel/migrations/0024_event_dependencies.py

+# Generated by Django 2.2.6 on 2019-10-25 13:44
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+from AKModel.models import AKCategory, Event, AKTrack
+
+
+def migrate_data_forward(apps, schema_editor):
+    for instance in AKCategory.objects.all():
+        if not instance.event:
+            instance.event = Event.objects.filter(active=True).last()
+        instance.save()
+
+    for instance in AKTrack.objects.all():
+        if not instance.event:
+            instance.event = Event.objects.filter(active=True).last()
+        instance.save()
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('AKModel', '0023_event_default_slot'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='akcategory',
+            name='event',
+            field=models.ForeignKey(help_text='Associated event', null=True,
+                                    on_delete=django.db.models.deletion.CASCADE, to='AKModel.Event',
+                                    verbose_name='Event'),
+        ),
+        migrations.AddField(
+            model_name='aktrack',
+            name='event',
+            field=models.ForeignKey(help_text='Associated event', null=True,
+                                    on_delete=django.db.models.deletion.CASCADE, to='AKModel.Event',
+                                    verbose_name='Event'),
+        ),
+
+        migrations.RunPython(
+            migrate_data_forward,
+            reverse_code=migrations.RunPython.noop,
+        ),
+
+        migrations.AlterField(
+            model_name='akcategory',
+            name='event',
+            field=models.ForeignKey(help_text='Associated event',
+                                    on_delete=django.db.models.deletion.CASCADE, to='AKModel.Event',
+                                    verbose_name='Event'),
+        ),
+        migrations.AlterField(
+            model_name='aktrack',
+            name='event',
+            field=models.ForeignKey(help_text='Associated event',
+                                    on_delete=django.db.models.deletion.CASCADE, to='AKModel.Event',
+                                    verbose_name='Event'),
+        ),
+    ]

AKModel/models.py

@@ -97,6 +97,9 @@ class AKCategory(models.Model):
     description = models.TextField(blank=True, verbose_name=_("Description"),
                                    help_text=_("Short description of this AK Category"))
 
+    event = models.ForeignKey(to=Event, null=True, on_delete=models.CASCADE, verbose_name=_('Event'),
+                              help_text=_('Associated event'))
+
     class Meta:
         verbose_name = _('AK Category')
         verbose_name_plural = _('AK Categories')
@@ -112,6 +115,9 @@ class AKTrack(models.Model):
     name = models.CharField(max_length=64, unique=True, verbose_name=_('Name'), help_text=_('Name of the AK Track'))
     color = models.CharField(max_length=7, blank=True, verbose_name=_('Color'), help_text=_('Color for displaying'))
 
+    event = models.ForeignKey(to=Event, null=True, on_delete=models.CASCADE, verbose_name=_('Event'),
+                              help_text=_('Associated event'))
+
     class Meta:
         verbose_name = _('AK Track')
         verbose_name_plural = _('AK Tracks')

AKSubmission/forms.py

@@ -4,7 +4,7 @@ from django import forms
 from django.core.exceptions import ValidationError
 from django.utils.translation import ugettext_lazy as _
 
-from AKModel.models import AK, AKOwner
+from AKModel.models import AK, AKOwner, AKCategory, AKRequirement
 
 
 class AKForm(forms.ModelForm):
@@ -48,6 +48,9 @@ class AKForm(forms.ModelForm):
             label=AK.tags.field.verbose_name,
             help_text=f"{AK.tags.field.help_text} ({help_tags_addition})")
 
+        self.fields['category'].queryset = AKCategory.objects.filter(event=self.initial.get('event'))
+        self.fields['requirements'].queryset = AKRequirement.objects.filter(event=self.initial.get('event'))
+
     @staticmethod
     def _clean_duration(duration):
         # Handle different duration formats (h:mm and decimal comma instead of point)