Fix: handle uuid fields created under mariadb and Django 4 (#8034)

src/documents/management/commands/convert_mariadb_uuid.py

@@ -0,0 +1,36 @@
+from django.core.management.base import BaseCommand
+from django.db import connection
+from django.db import models
+
+from documents.models import Document
+
+
+class Command(BaseCommand):
+    # This code is taken almost entirely from https://github.com/wagtail/wagtail/pull/11912 with all credit to the original author.
+    help = "Converts UUID columns from char type to the native UUID type used in MariaDB 10.7+ and Django 5.0+."
+
+    def convert_field(self, model, field_name, null=False):
+        if model._meta.get_field(field_name).model != model:  # pragma: no cover
+            # Field is inherited from a parent model
+            return
+
+        if not model._meta.managed:  # pragma: no cover
+            # The migration framework skips unmanaged models, so we should too
+            return
+
+        old_field = models.CharField(null=null, max_length=36)
+        old_field.set_attributes_from_name(field_name)
+
+        new_field = models.UUIDField(null=null)
+        new_field.set_attributes_from_name(field_name)
+
+        with connection.schema_editor() as schema_editor:
+            schema_editor.alter_field(model, old_field, new_field)
+            self.stdout.write(
+                self.style.SUCCESS(
+                    f"Successfully converted {model._meta.label} {field_name} field to UUID type.",
+                ),
+            )
+
+    def handle(self, **options):
+        self.convert_field(Document, "transaction_id", null=True)