CodeLift Completes Drupal 6 to 10 Migration for PlanningPlanet

PlanningPlanet, a longstanding community platform for professionals in Project Controls, has been successfully migrated from Drupal 6 to Drupal 10. The platform serves thousands of users with features such as forums, wiki documentation, job boards, and certification tools. Over 15 years of content, including 20 content types and deeply threaded forum discussions, were preserved in the transition.

The migration, executed by CodeLift, followed a multi-stage pipeline moving through Drupal 9 to ensure data integrity at each phase. Custom development was essential to handle complex data structures, such as wiki hierarchies and forum threads. CodeLift used AI tools like Claude Code to assist in generating queries, refactoring PHP classes, and automating migration scripts within a monorepo environment. A total of 14 custom data finalizers were created to manage nuanced content transformations.

The upgraded platform now runs on Drupal 10 with a responsive Bootstrap 5 front end, reCAPTCHA v3, Redis caching, and integration with Mailgun and Simplenews for newsletters. It maintains backward compatibility with all legacy URLs, preserving the full history of user contributions. CodeLift’s approach, including reusable migration components, positions this project as a model for complex Drupal upgrades involving legacy community systems.