From 1c256d2e63290344810175153ae77a71359d688a Mon Sep 17 00:00:00 2001
From: Ardiea <mas48@mit.edu>
Date: Fri, 30 Jan 2026 13:01:13 -0500
Subject: [PATCH] fix: Convert UUIDField columns to uuid type for Mariadb

The behavior of the MariaDB backend has changed behavior for UUIDField
from a `CharField(32)` to an actual `uuid` type. This is not converted
automatically, which results in all writes to the affected columns to
error with a message about the data being too long. This is because the
actual string being written is a UUID with the `-` included, resulting in
a 36 character value which can't be inserted into a 32 character column.
---
 .../0015_mariadb_uuid_conversion.py           | 74 +++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 cms/djangoapps/contentstore/migrations/0015_mariadb_uuid_conversion.py

diff --git a/cms/djangoapps/contentstore/migrations/0015_mariadb_uuid_conversion.py b/cms/djangoapps/contentstore/migrations/0015_mariadb_uuid_conversion.py
new file mode 100644
index 000000000000..923b678a31ef
--- /dev/null
+++ b/cms/djangoapps/contentstore/migrations/0015_mariadb_uuid_conversion.py
@@ -0,0 +1,74 @@
+# Generated migration for MariaDB UUID field conversion (Django 5.2)
+"""
+Migration to convert UUIDField from char(32) to uuid type for MariaDB compatibility.
+
+This migration is necessary because Django 5 changed the behavior of UUIDField for MariaDB
+databases from using CharField(32) to using a proper UUID type. This change isn't managed
+automatically, so we need to generate migrations to safely convert the columns.
+
+This migration only executes for MariaDB databases and is a no-op for other backends.
+
+See: https://www.albertyw.com/note/django-5-mariadb-uuidfield
+"""
+
+from django.db import migrations
+
+
+def apply_mariadb_migration(apps, schema_editor):
+    """Apply the migration only for MariaDB databases."""
+    connection = schema_editor.connection
+    
+    # Check if this is a MariaDB database
+    if connection.vendor != 'mysql':
+        return
+    
+    # Additional check for MariaDB specifically (vs MySQL)
+    with connection.cursor() as cursor:
+        cursor.execute("SELECT VERSION()")
+        version = cursor.fetchone()[0]
+        if 'mariadb' not in version.lower():
+            return
+    
+    # Apply the field changes for MariaDB
+    with connection.cursor() as cursor:
+        cursor.execute(
+            "ALTER TABLE oel_publishing_learningpackage "
+            "MODIFY uuid uuid NOT NULL"
+        )
+
+
+def reverse_mariadb_migration(apps, schema_editor):
+    """Reverse the migration only for MariaDB databases."""
+    connection = schema_editor.connection
+    
+    # Check if this is a MariaDB database
+    if connection.vendor != 'mysql':
+        return
+    
+    # Additional check for MariaDB specifically (vs MySQL)
+    with connection.cursor() as cursor:
+        cursor.execute("SELECT VERSION()")
+        version = cursor.fetchone()[0]
+        if 'mariadb' not in version.lower():
+            return
+    
+    # Reverse the field changes for MariaDB
+    with connection.cursor() as cursor:
+        cursor.execute(
+            "ALTER TABLE oel_publishing_learningpackage "
+            "MODIFY uuid char(32) NOT NULL"
+        )
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('contentstore', '0014_remove_componentlink_downstream_is_modified_and_more'),
+    ]
+
+    operations = [
+        migrations.RunPython(
+            code=apply_mariadb_migration,
+            reverse_code=reverse_mariadb_migration,
+        ),
+    ]