this post was submitted on 02 Jun 2026
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Lemmy
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Everything about Lemmy; bugs, gripes, praises, and advocacy.
For discussion about the lemmy.ml instance, go to !meta@lemmy.ml.
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huh, actually, in the activitypub protocol, user IDs are actually URLs. so the actual user id would be https://discuss.tchncs.de/u/basxto or https://lemmy.ml/c/lemmy
if it displays you something like "@basxto@discuss.tchncs.de", that's just because mastodon/lemmy uses a translation service that converts the convenient way to write account IDs to URLs under the hood. activitypub should be fine with a user and community existing with the same name, because their URLs are different. https://lemmy.server/u/name vs https://lemmy.server/c/name
It’s been a while since I ran into that issue and it’s rare to have a collision, but if I started a basxto community, @basxto@discuss.tchncs.de can only map to one. The absolute URLs are meaningless, since @ syntax is supposed to point to something on the current instance. Other URLs I have put into the search field of lemmy/mastodon to convert
For example see @test@discuss.tchncs.de and !test@discuss.tchncs.de
@basxto@discuss.tchncs.de
For example see @test and !test@discuss.tchncs.de
@gandalf_der_12te
Nice, both link the community here. !-syntax doesn’t do anything on mastodon
If somebody responds to the test account on mastodon, they’ll probably accidentally link the community