Migrate to is_supervisor being a database field

More efficient, but it does reduce app seperation. Probably not an issue for us!

RIGS/migrations/0044_profile_is_supervisor.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.2.11 on 2022-01-09 14:56
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('RIGS', '0043_auto_20211027_1519'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='profile',
+            name='is_supervisor',
+            field=models.BooleanField(default=False),
+        ),
+    ]

RIGS/migrations/0045_legacy_supervisors.py

@@ -0,0 +1,25 @@
+# Generated by Django 3.2.11 on 2022-01-09 15:00
+
+from django.db import migrations
+
+from training.models import TrainingLevel
+
+def find_existing_supervisors(apps, schema_editor):
+    Profile = apps.get_model('RIGS', 'Profile')
+    for person in Profile.objects.all():
+        if person.level_qualifications.exclude(confirmed_on=None).select_related('level') \
+                .filter(level__level__gte=TrainingLevel.SUPERVISOR) \
+                .exclude(level__department=TrainingLevel.HAULAGE) \
+                .exclude(level__department__isnull=True).exists():
+            person.is_supervisor = True
+            person.save()
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('RIGS', '0044_profile_is_supervisor'),
+    ]
+
+    operations = [
+        migrations.RunPython(find_existing_supervisors, migrations.RunPython.noop)
+    ]

RIGS/models.py

@@ -27,6 +27,7 @@ class Profile(AbstractUser):
     # Currently only populated by the admin approval email. TODO: Populate it each time we send any email, might need that...
     last_emailed = models.DateTimeField(blank=True, null=True)
     dark_theme = models.BooleanField(default=False)
+    is_supervisor = models.BooleanField(default=False)
 
     reversion_hide = True
 
@@ -56,11 +57,6 @@ class Profile(AbstractUser):
     def latest_events(self):
         return self.event_mic.order_by('-start_date').select_related('person', 'organisation', 'venue', 'mic', 'riskassessment', 'invoice').prefetch_related('checklists')
 
-    @cached_property
-    def as_trainee(self):
-        from training.models import Trainee
-        return Trainee.objects.get(pk=self.pk)
-
     @classmethod
     def admins(cls):
         return Profile.objects.filter(email__in=[y for x in settings.ADMINS for y in x])