Hi everyone, I’ve noticed a strange behavior with old topics that were automatically published from WordPress to Discourse (to be used as the comment section). Normally, when a post is published this way, Discourse correctly adds the X-Robots-Tag: noindex to the HTTP header and sets the canonical …

Hey Thiago, Just so I understand, are you saying the following: You have the site setting Embed set canonical URL enabled, and have always had it enabled. You have multiple topics published from your Wordpress to your Discourse via the Wordpress Discourse Plugin over a period of some time. Up unt…

Hi Angus! Yes, that’s it. The `embed set canonical URL` is enabled, too: [Screenshot 2026-05-18 at 13.55.19] You can see here that new topics are published with the noindex + canonical tags. But i’m seeing old topics without these tags.

Thiago, if you have access to the server, could you please get the id of a topic where the canonical url is not working, run the following in the rails console and share the result. ./launcher enter app rails c TopicEmbed.with_deleted.find_by(topic_id: add the topic id here)

discourse(prod)> TopicEmbed.with_deleted.find_by(topic_id:73608) => nil discourse(prod)> TopicEmbed.with_deleted.find_by(topic_id:79015) => nil discourse(prod)> TopicEmbed.with_deleted.find_by(topic_id:74248) => nil discourse(prod)> TopicEmbed.with_deleted.find_by(topic_id:76598) => nil

That’s the issue. In order for the canonical url for embeds feature to work, the topic needs a topic_embed record. Can you think of any reason why those topics may not have embed records?

I honestly don’t know what could have caused those topics to miss their topic_embed records. But looking at the bigger picture, wouldn’t it make more sense to go with the configuration I suggested earlier? If we add a checkbox directly in the category settings to apply noindex to all topics within …

[Bild] Thiago_Mobilon: But looking at the bigger picture, wouldn’t it make more sense to go with the configuration I suggested earlier? If we add a checkbox directly in the category settings to apply noindex to all topics within it, we wouldn’t have to rely on the embed feature or worry about wh…

While this behaves differently from topic embeds, category-level indexing control is a basic SEO requirement for any modern CMS. There are several other Meta topics about this, and making it native would solve multiple use cases at once. I might try to build a plugin using AI since Ruby isn’t my st…

Ältere über WordPress-Embed veröffentlichte Themen fehlen x-robots: noindex und Canonical-Tags

Unterstützung WordPress

angus (Angus McLeod) 16. Mai 2026 um 08:34 2

Hey Thiago,

Nur um sicherzugehen, fasse ich das wie folgt zusammen:

Du hast die Site-Einstellung „Canonical-URL einbetten

Thema		Antworten	Aufrufe
Add option to set canonical_url to embed_url Feature	12	2383	9. Oktober 2021
Need a way to add "meta robots noindex" in topics from a category Feature seo	6	1291	12. Februar 2025
Block crawlers from embedded topics only? Support	17	819	20. Juni 2023
Duplicate Content WordPress	33	4082	8. Februar 2025
Removing the /2, /3, /4, etc links for each reply within a topic URL Development seo	33	4256	13. Oktober 2024

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