add export/inport number

apps/edr-freight-api/src/migrations/2270000000000-AddWagonTrainNumbers.ts

@@ -0,0 +1,28 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+/**
+ * Per-wagon EXPORT/IMPORT run numbers, editable from the wagon form.
+ *
+ * Nullable with no default: a wagon is not on a run until an operator says so.
+ * Mirrors the width of trains.export_train_number / trains.import_train_number
+ * (varchar 20) so the two stay comparable.
+ */
+export class AddWagonTrainNumbers2270000000000 implements MigrationInterface {
+  name = 'AddWagonTrainNumbers2270000000000';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      ALTER TABLE freight.wagons
+        ADD COLUMN IF NOT EXISTS export_train_number varchar(20),
+        ADD COLUMN IF NOT EXISTS import_train_number varchar(20);
+    `);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      ALTER TABLE freight.wagons
+        DROP COLUMN IF EXISTS export_train_number,
+        DROP COLUMN IF EXISTS import_train_number;
+    `);
+  }
+}