Add migration for stateless event type

src/argus/incident/migrations/0005_alter_event_type.py

@@ -0,0 +1,35 @@
+# Generated by Django 3.2.11 on 2022-03-01 12:34
+
+from django.db import migrations, models
+
+
+def add_stateless_event_type(apps, schema_editor):
+    # Change INCIDENT_START events for stateless incidents to STATELESS
+    Event = apps.get_model('argus_incident', 'Event')
+    for event in Event.objects.all():
+        if event.type == "STA" and event.incident.end_time == None:
+            event.type="LES"
+            event.save()
+
+def remove_stateless_event_type(apps, schema_editor):
+    # undo changes made by add_stateless_event_type
+    Event = apps.get_model('argus_incident', 'Event')
+    for event in Event.objects.all():
+        if event.type == "LES":
+            event.type = "STA"
+            event.save()
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('argus_incident', '0004_add_ChangeEvent_proxy'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='event',
+            name='type',
+            field=models.CharField(choices=[('STA', 'Incident start'), ('END', 'Incident end'), ('CHI', 'Incident change'), ('CLO', 'Close'), ('REO', 'Reopen'), ('ACK', 'Acknowledge'), ('OTH', 'Other'), ('LES', 'Stateless')], max_length=3),
+        ),
+        migrations.RunPython(add_stateless_event_type, remove_stateless_event_type),
+    ]