Improve price information

games/migrations/0002_purchase_price_per_game.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.1.5 on 2025-01-30 11:04
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('games', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='purchase',
+            name='price_per_game',
+            field=models.FloatField(null=True),
+        ),
+    ]

games/migrations/0003_purchase_updated_at.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.1.5 on 2025-01-30 11:12
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('games', '0002_purchase_price_per_game'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='purchase',
+            name='updated_at',
+            field=models.DateTimeField(auto_now=True),
+        ),
+    ]

games/migrations/0004_purchase_num_purchases.py

@@ -0,0 +1,28 @@
+# Generated by Django 5.1.5 on 2025-01-30 11:57
+
+from django.db import migrations, models
+from django.db.models import Count
+
+
+def initialize_num_purchases(apps, schema_editor):
+    Purchase = apps.get_model("games", "Purchase")
+    purchases = Purchase.objects.annotate(num_games=Count("games"))
+
+    for purchase in purchases:
+        purchase.num_purchases = purchase.num_games
+        purchase.save(update_fields=["num_purchases"])
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("games", "0003_purchase_updated_at"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="purchase",
+            name="num_purchases",
+            field=models.IntegerField(default=0),
+        ),
+        migrations.RunPython(initialize_num_purchases),
+    ]