Only one subscription per user

subscription/migrations/0015_alter_subscription_user.py

@@ -0,0 +1,25 @@
+# Generated by Django 4.2.5 on 2023-10-14 22:27
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ("subscription", "0014_alter_subscriptionindexpage_body"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="subscription",
+            name="user",
+            field=models.OneToOneField(
+                on_delete=django.db.models.deletion.PROTECT,
+                related_name="subscription",
+                to=settings.AUTH_USER_MODEL,
+                verbose_name="subscriber",
+            ),
+        ),
+    ]

subscription/models.py

@@ -21,12 +21,12 @@
 class Subscription(models.Model):
     """A subscription to the magazine."""
 
-    user = models.ForeignKey(
+    user = models.OneToOneField(
         settings.AUTH_USER_MODEL,
         verbose_name="subscriber",
         editable=True,
         on_delete=models.PROTECT,
-        related_name="subscriptions",
+        related_name="subscription",
         unique=True,  # Only one subscription per user
     )