Make user preferred_language not nullable with default of fi

tilavarauspalvelu/migrations/0031_alter_user_preferred_language.py

@@ -0,0 +1,22 @@
+# Generated by Django 5.1.1 on 2024-10-03 11:47
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("tilavarauspalvelu", "0030_determine_preferred_language"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="user",
+            name="preferred_language",
+            field=models.CharField(
+                blank=True,
+                choices=[("fi", "Finnish"), ("en", "English"), ("sv", "Swedish")],
+                default="fi",
+                max_length=8,
+            ),
+        ),
+    ]

tilavarauspalvelu/models/user/model.py

@@ -37,7 +37,12 @@
 
 class User(AbstractUser):
     tvp_uuid: uuid.UUID = models.UUIDField(default=uuid.uuid4, editable=False, unique=True)
-    preferred_language: str | None = models.CharField(max_length=8, null=True, blank=True, choices=settings.LANGUAGES)
+    preferred_language: str = models.CharField(
+        max_length=8,
+        blank=True,
+        choices=settings.LANGUAGES,
+        default=settings.LANGUAGE_CODE,
+    )
     date_of_birth: datetime.date | None = models.DateField(null=True, blank=True)
     profile_id: str = models.CharField(max_length=255, blank=True, default="")