任意一个类别标签选择“无标签”后，切换类别，页面报错提示：糟糕！该页面不存在或者是一个不公开页面。

哈基米曼波 · 2026 年5 月 9 日 09:22

任意一个类别标签选择"无标签"后，切换类别，页面报错提示：糟糕！该页面不存在或者是一个不公开页面。

NateDhaliwal · 2026 年5 月 9 日 14:23

在此说明一下，这个问题可以在 Meta 上复现。

zogstrip · 2026 年5 月 11 日 18:51

感谢提交报告 @哈基米曼波这应该能解决问题

github.com/discourse/discourse

FIX: 404 when switching categories with the "No tags" filter active (#39894)

main ← fix-category-switch-with-no-tags-filter

opened 06:50PM - 11 May 26 UTC

ZogStriP

+33 -42

When a user opened a category, selected "No tags" in the tag dropdown, and then …picked another category from the breadcrumb, they landed on a 404 page instead of the new category with the "No tags" filter preserved. The breadcrumb's `CategoryDrop` passes its `tag` argument straight to `getCategoryAndTagUrl`. On a `/tags/c/<slug>/<id>/none` page that `tag` is a `Tag` model with `slug: "none"` and `id: null` — not the literal string `"none"` that `TagDrop` passes from its own handler. The URL builder unconditionally appended `tag.slug + "/" + tag.id`, producing `/tags/c/<new-slug>/<new-id>/none/null`, which no route can resolve. This normalizes the tag handling in `getCategoryAndTagUrl` so that any tag without an `id` (the "no tags" filter, whether expressed as a string or as a Tag model) renders as `.../<slug>` instead of `.../<slug>/null`. The category branch is also tidied up — it had an unreachable inner `else` because the outer condition already required `subcategories` to be true. https://meta.discourse.org/t/402545

system · 2026 年5 月 14 日 18:51

This topic was automatically closed 3 days after the last reply. New replies are no longer allowed.

话题		回复	浏览量
/tags/none route doesn't exist Bug	5	815	2020 年11 月 16 日
Inconsistency tags/tags ->category UX	0	505	2020 年12 月 4 日
Clicking on a category from a tags page leads to undefined page Bug	3	945	2015 年11 月 6 日
Routing problems with Discourse tagging plugin Bug	10	2452	2017 年5 月 9 日
"No Tags" option on navigation bar not working Bug	3	618	2018 年10 月 13 日

任意一个类别标签选择“无标签”后，切换类别，页面报错提示：糟糕！该页面不存在或者是一个不公开页面。

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