标签同义词在搜索中不工作

Eviepayne · 2025 年4 月 21 日 01:08

当我在论坛上使用 tags:tag1 进行搜索时，如果 tag1 是 tag-one 的同义词，我将不会获得任何结果，并且不会显示带有 tag-one 的帖子。

Eviepayne · 2025 年4 月 22 日 13:16

我认为这可能不是预期的行为，因此我将其标记为 bug。

sam · 2025 年4 月 23 日 05:30

我明白了，我们可能应该在这里添加同义词处理，同意。

将此标记为 pr-welcome，以防社区愿意提供帮助。搜索功能非常独立，为其编写测试应该非常直接。

Moin · 2026 年2 月 12 日 09:32

修复了

以下所有内容现在都可以正常工作：
搜索标签:howto
搜索标签:how-to
搜索 #howto
搜索 #how-to

github.com/discourse/discourse

FIX: Resolve tag synonyms in search and filter queries (#37628)

main ← fix/tag-synonyms-in-search

merged 07:57AM - 09 Feb 26 UTC

tgxworld

+109 -24

What is the problem? Discourse allows admins to mark a tag as a synonym of anot…her tag. For example, "brunch" can be made a synonym of "lunch". When this happens, all topics tagged with "brunch" are automatically retagged with "lunch", and the `tags.target_tag_id` column on the synonym tag record is set to point to the target tag. However, several code paths did not account for synonyms: 1. **Search:** `Search#search_tags` and the hashtag advanced filter did not resolve synonyms. When a user searched using a synonym name (e.g. `tags:brunch`, `tags:brunch+eggs`, or `#brunch`), no results were returned because: - The `tags:` comma path queries `topic_tags` joined with `tags` by name, but topics are tagged with the target tag "lunch", not the synonym "brunch". - The `tags:` plus path aggregates tag names per topic into a tsvector and matches against the searched name, but the aggregated names are target tag names, so "brunch" never matches. - The `#` hashtag path picks the synonym tag's own `id` and queries `topic_tags` by that ID, but topics store the target tag's ID. 2. **Filter route:** `TopicsFilter#tag_ids_from_tag_names` concatenated both the synonym's own ID and the target tag ID. For match-all queries (e.g. `tag:brunch`), this required a topic to have both IDs in `topic_tags`, which never happens since only the target tag ID is stored. For negation queries (e.g. `-tag:brunch`), the exclusion targeted the synonym ID rather than the target, so no topics were excluded. What is the solution? In `Search#search_tags`, add a synonym resolution step before the existing comma/plus branching logic. It splits the match string into individual tag names, queries for any that are synonyms via `Tag.where_name(tag_names).where.not(target_tag_id: nil)`, builds a name mapping, and replaces synonym names with their target tag names. The replacement operates on the split array elements rather than using substring replacement to avoid corrupting tag names that may contain other tag names as substrings. In the hashtag advanced filter, pick both `:id` and `:target_tag_id` from the tag lookup and prefer `target_tag_id` when present, so the query uses the target tag's ID instead of the synonym's own ID. In `TopicsFilter#tag_ids_from_tag_names`, replace the transpose/concat approach with `.map { |id, target_id| target_id || id }` to resolve each tag to its canonical ID — the target for synonyms, or the tag's own ID otherwise. A partial index on `tags.target_tag_id` is added (scoped to `WHERE target_tag_id IS NOT NULL`) to support efficient synonym lookups.

nat · 2026 年2 月 14 日 00:00

此主题在 38 小时后自动关闭。不再允许回复。

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Tags confusing (to all or me only) Support tags	4	233	2024 年6 月 9 日
Show original tag even if synonym tag is added Support	0	22	2024 年8 月 2 日
Don't show tag synonyms in suggestion lists Feature	6	755	2023 年7 月 20 日
Merging tags - Tag Synonyms Feature tags , completed	23	5286	2020 年1 月 29 日
Add search synonyms Feature	17	6083	2023 年6 月 1 日

标签同义词在搜索中不工作

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