Modernizing the Project Tree Plugin for Redmine 6

Challenge

In very large Redmine instances, the default project view can become slow and overloaded. A plugin from 2019 addressed this, but it was no longer compatible after upgrading to Redmine 6 / Rails 7.

Approach

I performed a full technical rework while preserving core behavior:

• updated plugin structure and registration
• modernized routing and lazy-loading paths
• refactored controllers and permissions checks
• cleaned up views and asset integration
• improved JavaScript behavior for expand/collapse and lazy loading
• consolidated icons/resources in a consistent asset system

Snapshot

• Industry: Software development / project management
• Time frame: 2025
• Technologies
  • Ruby on Rails (Redmine 6)
  • jQuery / AJAX
  • SVG sprite / asset pipeline
  • Redmine plugin architecture

The updated plugin restores fast, maintainable project-tree navigation and remains upgrade-compatible for future Redmine releases.