vibed/quotesdb/.nbd/tickets/175382.md

+++ title = "Implement tag join logic — fetch tags per quote, insert/replace tags on create/update" priority = 5 status = "done" ticket_type = "task" dependencies = ["a5049d"] +++

The `quotesdb` API is built with Axum + Tokio, targeting Cloudflare Workers via `workers-rs`. It serves JSON at `/api/*` endpoints and persists data to Cloudflare D1 (production) or a local SQLite file via Turso (development). Source lives in `src/bin/api/`.

Shared types and utilities are in src/lib.rs — code placed there must compile for both the host target and wasm32-unknown-unknown.

Each quote can have multiple tags stored in the quote_tags join table. Tags are not normalised — they are stored as plain strings per quote. On create/update, all tags for the quote are replaced atomically.

Implement tag fetch and upsert logic used by the API handlers: 1. `fetch_tags_for_quote(pool, quote_id) -> Vec` — SELECT from quote_tags 2. `replace_tags_for_quote(pool, quote_id, tags: &[String])` — DELETE existing, INSERT new tags in a transaction

This logic should live in a db or tags module and be called from the create and update handlers.

- Tag replacement must be atomic (use a transaction). - Empty `tags` array means "remove all tags" — this is valid. - Cascade delete on `quote_tags` handles tag cleanup when a quote is deleted — no separate delete-tags step needed. Use `superpowers:test-driven-development` — write unit tests that verify tag insertion, replacement, and empty-tag cases. Use `superpowers:verification-before-completion` before closing. Run in order from the `quotesdb/` directory:

cargo fmt
cargo check
cargo clippy
cargo test

`feat(quotesdb): implement tag join logic — fetch and replace tags per quote`