The release notes for 2.4.0.beta9 make various references to sub-sub-categories. Are these actually enabled in this release, or are they coming soon? On a related point is there a roadmap for future releases available anywhere?

Quick guide to set it from 2 (default) to 3 via the console: cd /var/discourse/ ./launcher enter app rails c read current value: [1] pry(main)> SiteSetting.max_category_nesting => 2 write new value: [2] pry(main)> SiteSetting.max_category_nesting = 3 => 3

They are currently behind a hidden site setting, max_category_nesting. Should you wish to test them out, modify the site setting via the console to 3 instead of 2. [image] rogerco: On a related point is there a roadmap for future releases available anywhere? Sure, see the #releases category …

Great, thanks - I was searching for roadmap because I assumed that releases were what had already been released… :doh: (wot, no Homer emoticon! )

[image] jomaxro: currently behind a hidden site setting Is there any reasonable chance this setting will be going away? In other words, how “safe” is it to use for production use as a data structure, even if the UX changes significantly?

[image] downey: Is there any reasonable chance this setting will be going away? There is not, no. The setting is here to stay. We’ve chosen to make it hidden as we want to encourage sites to strongly think about their IA (dfn) and if they can make it work with just 1-level of subcategories. A…

[image] jomaxro: strongly think about their IA Yeah agree, that makes very good sense. We are only considering it for internal administrative type stuff that already has a lot of hierarchy, and those categories would be hidden from non-staff.

Hello jomaxro, whatever can you teach me up level category to 4 or up to 5?

There is no support for category nesting greater than 3.

This seems like an awkward implementation for users. After setting up sub categories and then later wanting to move them, I ran across this level restriction. I had to adjust my implementation as a result. And now I see that it’s possible to have more levels … but (a) the feature is hidden and undo…

We haven’t designed the UI or tested performance beyond 3 category levels, so we don’t support it. Supporting 3 is meant to cover some exceptions and wasn’t intended to be the norm, which is why it’s not easily discoverable.

I meet this error: I can create a topic in sub sub category (A) when in category A, but in homepage when create a topic, in UI to select category don’t display all of sub-sub category (include A) [image] I see my error same this topic [image] Create a new Topic in one cat…

Sub-sub-categories

Support

Topic		Replies	Views
Confusion about nesting a subcategory inside of another Support	2	499	July 1, 2023
Having a sub + sub category Feature	8	765	March 22, 2023
Displaying subcategories Support	3	159	March 5, 2025
How to enable (3+ level) nested subcategories Support categories	3	139	February 18, 2026
Creating Subcategory under a Subcategory? Support	8	245	February 13, 2025

Sub-sub-categories

Related topics