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Sending a private message without cc causes a 500 error
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this post was submitted on 19 Feb 2025
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ActivityPub
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Focused discussion related to ActivityPub integration in NodeBB
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@freamon
Create(ChatMessage)is not part of ActivityPub. From my light research online it is something added by a Pleroma extension and possibly supported by Lemmy.NodeBB will automatically slot received non-public notes as chat messages.
@julian Oh, right. Thanks. But yeah, it's what Lemmy (and PieFed) uses, so I just assumed it was part of AP, and never looked into it any further.
I was thinking while typing this "I bet that means that chat messages from NodeBB to PieFed will fail", which I just tested, and sure enough they do (I'll make an Issue for it on PieFed's repo).
Ah, that's unfortunate. When NodeBB sends a chat message out, it is just a regular Note with the recipients directly addressed, with no
as:Publicpseudo-user.So as long as PieFed handles mentioned-only notes the activity should be processed...
@julian It currently doesn't. If someone is Mentioned, the assumption is that it was part of post / comment in a community, and it fails because it can't find the community. I know that, for Lemmy, if you Mention someone in a comment, and they don't have a copy of the community (or they do and there's no local subscribers to it), then it will reject it. I don't know what it does if there's no community at all (I'll figure out a way to test it, on a server I can control).
@freamon Update: no, Lemmy doesn't understand them either. It rejects Create / Note without a community with the usual "did not match any variant of untagged enum AnnouncableActivities"