Train scheduling API,Routes and UI

apps/edr-freight-api/src/migrations/1750200000000-AddPhysicalWagonToTrainSetWagons.ts

@@ -0,0 +1,48 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class AddPhysicalWagonToTrainSetWagons1750200000000 implements MigrationInterface {
+  name = 'AddPhysicalWagonToTrainSetWagons1750200000000';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      ALTER TABLE freight.train_set_wagons
+      ADD COLUMN IF NOT EXISTS physical_wagon_id UUID NULL;
+    `);
+
+    await queryRunner.query(`
+      DO $$
+      BEGIN
+        IF NOT EXISTS (
+          SELECT 1
+          FROM information_schema.table_constraints
+          WHERE constraint_schema = 'freight'
+            AND table_name = 'train_set_wagons'
+            AND constraint_name = 'fk_train_set_wagons_physical_wagon'
+        ) THEN
+          ALTER TABLE freight.train_set_wagons
+          ADD CONSTRAINT fk_train_set_wagons_physical_wagon
+          FOREIGN KEY (physical_wagon_id)
+          REFERENCES freight.wagons(id)
+          ON DELETE SET NULL;
+        END IF;
+      END $$;
+    `);
+
+    await queryRunner.query(`
+      CREATE INDEX IF NOT EXISTS idx_train_set_wagons_physical_wagon
+      ON freight.train_set_wagons(physical_wagon_id);
+    `);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`DROP INDEX IF EXISTS freight.idx_train_set_wagons_physical_wagon;`);
+    await queryRunner.query(`
+      ALTER TABLE freight.train_set_wagons
+      DROP CONSTRAINT IF EXISTS fk_train_set_wagons_physical_wagon;
+    `);
+    await queryRunner.query(`
+      ALTER TABLE freight.train_set_wagons
+      DROP COLUMN IF EXISTS physical_wagon_id;
+    `);
+  }
+}