node-pg-migrate keeps the schema; Drizzle is for queries only. The conventions doc said this was unsettled and now says what was settled and why: drizzle-kit cannot diff expression indexes and emitted six statements for one column, our migrations are mostly prose that generated SQL does not carry, and data migrations cannot be generated at all.
The reasoning in full is on the issue. This is the version a reader converting a query will actually find.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Columns in a sql template render unqualified, so a correlated subquery correlates with itself and returns a plausible wrong number rather than failing. That is worse than the array trap already recorded here, which at least produces invalid SQL — this produces valid SQL and quietly wrong data, and only an integration test asserting a value caught it.
And a driver error code moves when Drizzle wraps it, so a catch keyed on a SQLSTATE still compiles and silently stops matching.
Also records that the camelCase mirror and the snake_case API mean every select must map columns explicitly, because selecting the table changes the JSON contract with nothing to notice.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Infrastructure only. No route is converted, nothing changes at run time.
The mirror had already drifted, which settles how it should be maintained. schema.ts was missing item_drafts and upload_links from the moment #222 landed, because the spike pulled into ./drizzle and copied the file into src/ by hand, and nobody had reason to look at the copy for a week. So `out` now points at src/db-drizzle and pull refreshes in place — the copy step that made the drift possible is gone — and tablesFilter excludes pgmigrations, which is node-pg-migrate's bookkeeping and has no business in a model of the application's schema.
A stale mirror is worse than no mirror, because Drizzle infers row types from it: a converted query would type-check against a schema the database does not have and fail at run time on a column that does not exist. drizzleSchema.integration.test.ts fails when the two disagree, on tables and on columns. It was checked by removing item_drafts from the mirror and confirming the test fails naming it, rather than trusting a green run on a file that already matched.
pull also emits 0000_*.sql and meta/ into `out`, because that directory serves both purposes. Both are gitignored: this project's migration history is backend/migrations, hand-written and mostly prose, and #219 has not chosen otherwise — a stray SQL file in src/ is at best noise and at worst mistaken for real history.
db is exported beside pool and shares its connections. Both must work at once, since conversion is file by file across 187 sites; separate pools would make a transaction on one invisible to the other and silently double the configured limits.
The generated files are excluded from linting. #261 hand-fixed an unused-parameter warning in schema.ts and this re-pull put it straight back, which is the argument in one line: linting generated code buys a fix the next regeneration undoes. itemFilters.drizzle.ts, which is hand-written, is still linted.
CONVENTIONS.md records the sql.param() array trap before anyone hits it — the wrong form type-checks, reads correctly and fails at run time as invalid Postgres — and the reason the adoption is worth doing at all, which is that ${value} emits a bind parameter and there is no way to spell "interpolate this as SQL" by accident.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
bermudalambandClaude Opus 5