Add PocketBase integration for TanStack DB

[KevinBonnoron]

🎯 Changes

Add PocketBase integration for TanStack DB with the new @tanstack/pocketbase-db-collection package.

Features:

• Real-time synchronization with PocketBase via subscriptions
• Mutation support (insert, update, delete) with built-in handlers
• Schema support (Zod, Valibot, etc.) with type inference and runtime validation
• Automatic subscription cleanup management
• Complete unit test coverage

Implementation:

• Follows the same pattern as rxdb-db-collection for consistency
• TypeScript overloads to distinguish schema vs non-schema cases
• Error handling with automatic cleanup on failure

✅ Checklist

• I have followed the steps in the Contributing guide.
• I have tested this code locally with pnpm test:pr.

🚀 Release Impact

• This change affects published code, and I have generated a changeset.
• This change is docs/CI/dev-only (no release).

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[samwillis]

Hi @KevinBonnoron

Thanks for this!

As a general rule we will only add a new collection implementation to the db monorepo if it will be supported by the developers of the underlying backend. We need a commitment from them to ensure that the collection will be maintained and bugs fixed going forward. Could I ask if you are a core developer of PocketBase? If not you are welcome to reach out to them and see if they would be interested.

[KevinBonnoron]

Hello @samwillis,

No I am not maintainer of pocketbase. Just a regular user.
I will ask them if they are interested.

Thanks.

Regards

[kevin-dp]

@KevinBonnoron you can always open a PR to add a link to your collection repo the list of community packages in our docs.

[nathanstitt]

Hey @KevinBonnoron! great minds think alike, I literally just created https://github.com/nathanstitt/pbtsdb about the same time you opened this.

I took a slightly different approach and built on top of a schema that's generated by a tool like https://github.com/satohshi/pocketbase-schema-generator for the types and did not use any client-side validation with zod like you have. My implementation is completely typed though and supports most of the DB query operators.

I'd love to collaborate on a library if you'd be game for that?

[KevinBonnoron]

@samwillis
Unfortunatly they said no. So I will close this PR.

@kevin-dp
Great idea, will probably do it.

@nathanstitt
Hey! Great lib you've made. I think I will probably take this code to a public repo. You're very welcome if you want to help 😃