fix(db): replace DROP-based reset with TRUNCATE RESTART IDENTITY CASCADE

GRO-2722: packages/db/src/reset.ts and apps/api/src/db/reset.ts no longer
emit any DROP TABLE / DROP TYPE / DROP SCHEMA / DROP DATABASE DDL. The four
destructive DO-blocks are replaced with a single:

  TRUNCATE <all public tables> RESTART IDENTITY CASCADE

Table names are enumerated dynamically via pg_tables WHERE schemaname='public'
so new tables are picked up automatically. The drizzle schema and
__drizzle_migrations table are untouched (different schema), keeping
drizzle-kit migrate a no-op on an already-migrated DB.

Preserves: production guard (NODE_ENV=production && ALLOW_RESET!='true'),
advisory lock, migrations (drizzle-kit migrate), and seed (runSeedBody).

Fixes the GRO-2678 prod outage root cause.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/db/reset.ts

@@ -1,10 +1,17 @@
 /**
- * reset.ts — Drop all application tables and re-run migrations + seed.
+ * reset.ts — Truncate all public tables and restart identity sequences.
  *
- * Intended for local development only. Never run against production.
+ * Schema-safe: never issues destructive DDL against any schema.
+ * The drizzle schema and __drizzle_migrations table are preserved so
+ * drizzle-kit migrate remains a no-op on an already-migrated DB.
+ *
+ * NOTE: this file is NOT the deployed reset entrypoint — the reset image
+ * builds from packages/db and runs `pnpm --filter @groombook/db reset`.
+ * apps/api db:reset delegates there too (see apps/api/package.json).
+ * Keep in sync with packages/db/src/reset.ts (GRO-2722).
  *
  * Usage:
- *   DATABASE_URL=postgres://... npx tsx packages/db/src/reset.ts
+ *   DATABASE_URL=postgres://... npx tsx apps/api/src/db/reset.ts
  */
 
 import postgres from "postgres";
@@ -23,43 +30,30 @@ async function reset() {
 
   const client = postgres(url, { max: 1 });
 
-  console.log("Dropping all application tables...\n");
+  console.log("Truncating all public tables...\n");
 
-  // Drop in dependency order (children before parents)
-  await client`
-    DO $$ DECLARE
-      r RECORD;
-    BEGIN
-      FOR r IN (
-        SELECT tablename FROM pg_tables
-        WHERE schemaname = 'public'
-      ) LOOP
-        EXECUTE 'DROP TABLE IF EXISTS public.' || quote_ident(r.tablename) || ' CASCADE';
-      END LOOP;
-    END $$;
+  // Enumerate all base tables in the public schema dynamically, then
+  // issue a single TRUNCATE with RESTART IDENTITY CASCADE so FK cycles
+  // are not a problem. The drizzle schema and __drizzle_migrations are
+  // intentionally excluded (different schema) so drizzle-kit migrate
+  // stays a no-op on an already-migrated DB.
+  const tables = await client<{ tablename: string }[]>`
+    SELECT tablename FROM pg_tables
+    WHERE schemaname = 'public'
   `;
 
-  // Drop custom enums
-  await client`
-    DO $$ DECLARE
-      r RECORD;
-    BEGIN
-      FOR r IN (
-        SELECT typname FROM pg_type
-        WHERE typtype = 'e' AND typnamespace = (
-          SELECT oid FROM pg_namespace WHERE nspname = 'public'
-        )
-      ) LOOP
-        EXECUTE 'DROP TYPE IF EXISTS ' || quote_ident(r.typname) || ' CASCADE';
-      END LOOP;
-    END $$;
-  `;
+  if (tables.length > 0) {
+    // Double-quote each identifier (escaping embedded quotes) to handle
+    // any table name safely without a pg-specific quote_ident helper.
+    const tableList = tables
+      .map((t) => `"${t.tablename.replace(/"/g, '""')}"`)
+      .join(", ");
+    await client.unsafe(
+      `TRUNCATE ${tableList} RESTART IDENTITY CASCADE`,
+    );
+  }
 
-  // Drop the drizzle migrations tracking table
-  await client`DROP TABLE IF EXISTS drizzle.__drizzle_migrations CASCADE`;
-  await client`DROP SCHEMA IF EXISTS drizzle CASCADE`;
-
-  console.log("✓ All tables and enums dropped\n");
+  console.log("✓ All public tables truncated, sequences reset\n");
 
   await client.end();
 }

packages/db/src/reset.ts

@@ -1,15 +1,14 @@
 /**
- * reset.ts — Drop all application tables, re-run migrations, and re-seed.
+ * reset.ts — Truncate all public tables and restart identity sequences.
  *
- * Intended for local development only. Never run against production.
+ * Schema-safe: never issues destructive DDL against any schema.
+ * The drizzle schema and __drizzle_migrations table are preserved so
+ * drizzle-kit migrate remains a no-op on an already-migrated DB.
  *
- * Usage:
- *   DATABASE_URL=postgres://... npx tsx packages/db/src/reset.ts
- *
- * GRO-2139: the entire drop→migrate→seed chain runs inside a single
+ * GRO-2139: the entire truncate→migrate→seed chain runs inside a single
  * Postgres advisory lock (SEED_ADVISORY_LOCK_KEY) so a concurrent
  * `seed.ts` (e.g. the dev `seed-test-data-*` Job being recreated at
- * the top of the hour) cannot interleave between `reset.ts` (DROP)
+ * the top of the hour) cannot interleave between `reset.ts` (TRUNCATE)
  * and `seed.ts` (TRUNCATE+insert) and collide on `invoices_pkey`.
  *
  * Why this matters: `seed.ts` derives every primary key from a single
@@ -22,10 +21,14 @@
  * GRO-2123 added the advisory lock around `runSeedBody` but left
  * `reset.ts` and `drizzle-kit migrate` outside the lock. This script
  * now wraps the *whole* chain in the same lock: `withSeedAdvisoryLock`
- * pins the lock to one reserved session and the DROP → migrate → seed
+ * pins the lock to one reserved session and the TRUNCATE → migrate → seed
  * work runs on the rest of the pool, so the lock guarantees mutual
  * exclusion against any concurrent seeder for the entire chain.
  *
+ * For a full local schema teardown (nuke tables, enums, drizzle schema)
+ * use `pnpm --filter @groombook/db db:nuke` instead — never change this
+ * script to be destructive (GRO-2722 / GRO-2678 prod incident).
+ *
  * See: groombook/infra `apps/base/reset-cronjob.yaml` (CronJob) and
  * `apps/base/seed-job.yaml` (one-shot Job) — both invoke the same
  * `seed.ts` code path on the same database in `groombook-dev`.
@@ -67,7 +70,7 @@ async function reset() {
   // Pool sizing is load-bearing here. `withSeedAdvisoryLock` does
   // `pool.reserve()` to pin the advisory lock to one dedicated session
   // (a session-level lock released on a *different* pooled connection is
-  // a no-op), and the DROP / migrate / seed work then runs on the
+  // a no-op), and the TRUNCATE / migrate / seed work then runs on the
   // *remaining* pooled connections. The lock provides mutual exclusion
   // across processes regardless of how many connections the work uses —
   // it does NOT require the work to share the lock's session.
@@ -82,43 +85,30 @@ async function reset() {
 
   try {
     await withSeedAdvisoryLock(client, async () => {
-      console.log("Dropping all application tables...\n");
+      console.log("Truncating all public tables...\n");
 
-      // Drop dependencies (tables) first
-      await client`
-        DO $$ DECLARE
-          r RECORD;
-        BEGIN
-          FOR r IN (
-            SELECT tablename FROM pg_tables
-            WHERE schemaname = 'public'
-          ) LOOP
-            EXECUTE 'DROP TABLE IF EXISTS public.' || quote_ident(r.tablename) || ' CASCADE';
-          END LOOP;
-        END $$;
+      // Enumerate all base tables in the public schema dynamically, then
+      // issue a single TRUNCATE with RESTART IDENTITY CASCADE so FK cycles
+      // are not a problem. The drizzle schema and __drizzle_migrations are
+      // intentionally excluded (different schema) so drizzle-kit migrate
+      // stays a no-op on an already-migrated DB.
+      const tables = await client<{ tablename: string }[]>`
+        SELECT tablename FROM pg_tables
+        WHERE schemaname = 'public'
       `;
 
-      // Drop custom enums
-      await client`
-        DO $$ DECLARE
-          r RECORD;
-        BEGIN
-          FOR r IN (
-            SELECT typname FROM pg_type
-            WHERE typtype = 'e' AND typnamespace = (
-              SELECT oid FROM pg_namespace WHERE nspname = 'public'
-            )
-          ) LOOP
-            EXECUTE 'DROP TYPE IF EXISTS ' || quote_ident(r.typname) || ' CASCADE';
-          END LOOP;
-        END $$;
-      `;
+      if (tables.length > 0) {
+        // Double-quote each identifier (escaping embedded quotes) to handle
+        // any table name safely without a pg-specific quote_ident helper.
+        const tableList = tables
+          .map((t) => `"${t.tablename.replace(/"/g, '""')}"`)
+          .join(", ");
+        await client.unsafe(
+          `TRUNCATE ${tableList} RESTART IDENTITY CASCADE`,
+        );
+      }
 
-      // Drop the drizzle migrations tracking table
-      await client`DROP TABLE IF EXISTS drizzle.__drizzle_migrations CASCADE`;
-      await client`DROP SCHEMA IF EXISTS drizzle CASCADE`;
-
-      console.log("✓ All tables and enums dropped\n");
+      console.log("✓ All public tables truncated, sequences reset\n");
 
       console.log("Running migrations...");
       // GRO-2672: drizzle-orm's migrate() has a high-water-mark bug that skips