Merge pull request #761 from Tria-plc/freight_feature/usermanagement

fix rate edit

apps/edr-freight-api/src/migrations/2300000000000-CreateRateChangeRequests.ts

@@ -0,0 +1,47 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+/**
+ * Approval workflow for edits to LIVE rates. A LIVE rate is what pricing
+ * charges, so it is never edited in place: the edit is filed here as PENDING
+ * and the live row keeps its value until an approver applies it.
+ *
+ * `payload` holds the changed fields only; `previous_values` snapshots what
+ * they were at submit time so the approver sees a real before→after diff.
+ */
+export class CreateRateChangeRequests2300000000000 implements MigrationInterface {
+  name = 'CreateRateChangeRequests2300000000000';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      CREATE TABLE IF NOT EXISTS freight.rate_change_requests (
+        id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+        rate_id uuid NOT NULL REFERENCES freight.rates (id),
+        payload jsonb NOT NULL,
+        previous_values jsonb NOT NULL,
+        status varchar(10) NOT NULL DEFAULT 'PENDING',
+        requested_by_user_id uuid NULL,
+        decided_by_user_id uuid NULL,
+        decided_at timestamptz NULL,
+        decision_note text NULL,
+        created_at timestamptz NOT NULL DEFAULT now(),
+        updated_at timestamptz NOT NULL DEFAULT now(),
+        deleted_at timestamptz NULL
+      )
+    `);
+    await queryRunner.query(`
+      CREATE INDEX IF NOT EXISTS idx_rcr_status
+        ON freight.rate_change_requests (status)
+    `);
+    // At most one pending edit per rate — two racing requests would both pass
+    // validation and the second would silently overwrite the first on approval.
+    await queryRunner.query(`
+      CREATE UNIQUE INDEX IF NOT EXISTS uq_rcr_one_pending_per_rate
+        ON freight.rate_change_requests (rate_id)
+        WHERE status = 'PENDING' AND deleted_at IS NULL
+    `);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`DROP TABLE IF EXISTS freight.rate_change_requests`);
+  }
+}