From 1d57e715ccbf1aee886af56ef486fff603cd2719 Mon Sep 17 00:00:00 2001
From: Radek Czajka <rczajka@rczajka.pl>
Date: Wed, 3 Sep 2025 14:58:30 +0200
Subject: [PATCH] idempotent device token

---
 src/push/api/views.py                         |  3 ++-
 ...cetoken_options_alter_devicetoken_token.py | 22 +++++++++++++++++++
 src/push/models.py                            |  2 +-
 3 files changed, 25 insertions(+), 2 deletions(-)
 create mode 100644 src/push/migrations/0006_alter_devicetoken_options_alter_devicetoken_token.py

diff --git a/src/push/api/views.py b/src/push/api/views.py
index 9de21c9cc..3eae8e369 100644
--- a/src/push/api/views.py
+++ b/src/push/api/views.py
@@ -21,10 +21,11 @@ class DeviceTokenSerializer(serializers.ModelSerializer):
             return self.create(self.validated_data)
 
     def create(self, validated_data):
-        return models.DeviceToken.objects.create(
+        obj, created = models.DeviceToken.objects.get_or_create(
             user=self.context['request'].user,
             token=validated_data['token'],
         )
+        return obj
 
     def destroy(self, validated_data):
         models.DeviceToken.objects.filter(
diff --git a/src/push/migrations/0006_alter_devicetoken_options_alter_devicetoken_token.py b/src/push/migrations/0006_alter_devicetoken_options_alter_devicetoken_token.py
new file mode 100644
index 000000000..520404a96
--- /dev/null
+++ b/src/push/migrations/0006_alter_devicetoken_options_alter_devicetoken_token.py
@@ -0,0 +1,22 @@
+# Generated by Django 4.0.8 on 2025-09-03 12:56
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('push', '0005_devicetoken'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='devicetoken',
+            options={'ordering': ('-updated_at',)},
+        ),
+        migrations.AlterField(
+            model_name='devicetoken',
+            name='token',
+            field=models.CharField(max_length=1024, unique=True),
+        ),
+    ]
diff --git a/src/push/models.py b/src/push/models.py
index 71e169ee9..3d86b9690 100644
--- a/src/push/models.py
+++ b/src/push/models.py
@@ -20,7 +20,7 @@ class Notification(models.Model):
 
 class DeviceToken(models.Model):
     user = models.ForeignKey('auth.User', models.CASCADE)
-    token = models.CharField(max_length=1024)
+    token = models.CharField(max_length=1024, unique=True)
     created_at = models.DateTimeField(auto_now_add=True)
     updated_at = models.DateTimeField(auto_now=True)
 
-- 
2.20.1