u

scripts/downgradeSchema.js

@@ -0,0 +1,30 @@
+/**
+ * Downgrades the configured database (from `.env`) to a target schema version.
+ *
+ *   npm run downgrade -- <targetVersion>
+ *
+ * Uses libdashstore's `src/providers/<provider>/downgrade/<from>_to_<to>.js`.
+ * Stop the API first; starting it again upgrades back to the latest version.
+ */
+import { createProvider } from '../src/db/provider.js';
+import env from '../src/config/env.js';
+
+const [rawTarget] = process.argv.slice(2);
+const target = Number(rawTarget);
+if (!rawTarget || !Number.isInteger(target) || target < 1) {
+    console.error('Usage: npm run downgrade -- <targetVersion>');
+    process.exit(1);
+}
+
+const provider = createProvider();
+try {
+    const before = await provider.getSchemaVersion();
+    const steps = await provider.downgradeSchema(target);
+    console.log(`Schema ${env.dbProvider}: ${before} -> ${target} (${steps} step(s))`);
+} catch (err) {
+    console.error(`Downgrade failed: ${err.message}`);
+    process.exitCode = 1;
+} finally {
+    await provider.close();
+}
+