Store service directly in Hit

shynet/analytics/migrations/0006_hit_service.py

@@ -0,0 +1,38 @@
+# Generated by Django 3.1.7 on 2021-03-28 19:36
+
+from ..models import Hit, Session
+from django.db import migrations, models
+import django.db.models.deletion
+from django.db.models import Subquery, OuterRef
+
+def add_service_to_hits(_a, _b):
+    service = Session.objects.filter(
+        pk=OuterRef('session')
+    ).values_list(
+        'service'
+    )[:1]
+
+    Hit.objects.update(
+        service=Subquery(service)
+    )
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0008_auto_20200628_1403'),
+        ('analytics', '0005_auto_20210328_1518'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='hit',
+            name='service',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='core.service'),
+        ),
+        migrations.RunPython(add_service_to_hits, lambda: ()),
+        migrations.AlterField(
+            model_name='hit',
+            name='service',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='core.service'),
+        ),
+    ]