this post was submitted on 06 Jul 2023
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Web Development

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Welcome to the web development community! This is a place to post, discuss, get help about, etc. anything related to web development

What is web development?

Web development is the process of creating websites or web applications

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Wormhole

Some webdev blogsNot sure what to post in here? Want some web development related things to read?

Heres a couple blogs that have web development related content

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[–] [email protected] 2 points 1 year ago (1 children)

And the post on lemmy.world: https://lemmy.world/post/1086238

I think we need UUIDs so we can reference posts across instances

[–] [email protected] 1 points 1 year ago (2 children)

That's a harder proposition than you might think. On the one hand, UUIDs are mathematically guaranteed to be universally unique, which is great. On the other hand, there has to be some way to go from a UUID to a particular post, which suggests a lookup table, but the federated nature of Lemmy basically makes that impossible, since there's no assurance that any instance is aware of any other instance.

[–] [email protected] 2 points 1 year ago* (last edited 1 year ago)

which suggests a lookup table

No, it only suggests an additional field in the Post table

since there’s no assurance that any instance is aware of any other instance

It already works like that, but slightly worse because post IDs aren't the same across instances. If you search a newly-created community from another instance here, you just won't find it until it's synced, despite its URI being unique.

Thinking about it, it would be possible to have an URI for posts like post:${id}@instance.com, similar to how user URIs and community URIs are made. This way, you could open /post/1772651 on lemmy.world or post:[email protected] on, idk, lemmy.blahaj.zone or something.

[–] [email protected] 1 points 1 year ago (1 children)

Another issue is whether the post from a remote instance is colocated on your local instance. It could be the case that your instance never observed the post, as no users on your local instance where first subscribed, to the remote community the post was summited to, before the post was published.

[–] [email protected] 1 points 1 year ago (1 children)

This is probably not the correct place to as this and I don't know the inner workings of Lemmy, so forgive the stupid question. Does that mean, for an external post to get a programming.dev ID does someone in programming.dev instance to have been subscribed to the community the post was originally shared? Is that why I don't see any posts at for example https://programming.dev/c/[email protected] even though I see them at https://voyager.lemmy.ml/c/testbot42? If that's the case, it sounds like an important limitation.

[–] [email protected] 2 points 1 year ago

The first link you listed (viewing the remote community from our local instance) shows 0 subscribers from the sidebar. From my understanding, no one from our instance is then subscribed to that remote community, so our instance has no reason to index those posts. Although I could be wrong, and it could be that no one from our local instance is subscribed to any community on the remote instance. I'm unsure if only instance federation or community subscription is necessary for merrioring/indexing remote posts.