fix

apps/edr-freight-api/src/migrations/1890000000006-AddDriverFaydaSubUnique.ts

@@ -0,0 +1,23 @@
+import { MigrationInterface, QueryRunner } from "typeorm";
+
+/**
+ * Enforce one driver record per verified Fayda identity. A unique index on
+ * fayda_sub blocks a second driver from being created against the same Fayda
+ * OIDC subject; NULLs stay distinct so legacy/unverified rows are unaffected.
+ */
+export class AddDriverFaydaSubUnique1890000000006 implements MigrationInterface {
+  name = "AddDriverFaydaSubUnique1890000000006";
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      CREATE UNIQUE INDEX IF NOT EXISTS "UQ_DRIVERS_FAYDA_SUB"
+      ON freight.drivers (fayda_sub)
+    `);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      DROP INDEX IF EXISTS freight."UQ_DRIVERS_FAYDA_SUB"
+    `);
+  }
+}