"One article, many categories", Reda Mohamed brings native multi-category support to Joomla in his Google Summer of Code (GSoC) 2026 project.

His Google Summer of Code 2026 project brings native multi-category support to Joomla content, a primary category that anchors existing features, plus any number of secondary categories kept outside the nested category tree, so category rebuilds aren't touched.

Covers the core-integration approach, a live demo (backend config, custom fields, front-end filtering and navigation), and the room's Q&A on the long-running tags-vs-categories debate.

(Recorded at Joomla User Group London (#JUGL) meetup - July 2026)

** Joomla London User Group (#JUGL) Online meetups: 3rd Tuesday of EVERY Month (19:00) **

Links from Video:
Project repo: https://github.com/joomla-projects/gsoc26_multicategory
Live demo: https://reda.chmst.de/
Project Mattermost channel: https://joomlacommunity.cloud.mattermost.com/main/channels/multi-category-project

More from Reda:
Joomla Community Magazine (all his articles): https://magazine.joomla.org/authors/reda-mohamed
"From Being Afraid to Becoming a Joomla Contributor" (JCM, June 2026):
https://magazine.joomla.org/issues/2026/june-2026/from-being-afraid-to-becoming-a-joomla-contributor
Personal GitHub: https://github.com/Reda-Muhamed

Contact Reda:
Mattermost: @reda-mohamed (joomlacommunity.cloud.mattermost.com)
GitHub: https://github.com/Reda-Muhamed

Joomla User Group London (#JUGL)
Site & Socials:
https://www.joomlalondon.co.uk
Twitter: https://twitter.com/joomlalondon
Bluesky: https://bsky.app/profile/joomlalondon.bsky.social
Facebook: https://www.facebook.com/joomlausergrouplondon/

Useful Joomla! Docs & Links:
Joomla! https://www.joomla.org
Try Joomla!: https://launch.joomla.org
News: https://www.joomla.org/announcement
Joomla Nightly Builds: https://developer.joomla.org/nightly-builds.html
Joomla Extensions Directory (JED): https://extensions.joomla.org

Timeline:
0:00:00 Introduction
0:00:24 Thanks to the mentors
0:00:48 Should content belong to just one category?
0:02:04 Can tags solve this?
0:03:17 Extensions reflect the demand
0:04:14 Why core support matters
0:04:46 Secondary categories, primary stays primary
0:05:21 Live demo
0:12:28 Technical hitch & question break
0:15:40 Demo resumes
0:22:50 Questions & answers

#gsoc #joomla #jugl #livedemo #cms #opensource #london #development