resolve confilict

apps/edr-freight-api/src/migrations/1750000000000-AddTrainExtendedColumns.ts

@@ -0,0 +1,45 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+/**
+ * Train entity gained extended fields; baseline trains table only had code/capacity/status/notes.
+ */
+export class AddTrainExtendedColumns1750000000000 implements MigrationInterface {
+  name = 'AddTrainExtendedColumns1750000000000';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      ALTER TABLE freight.trains
+        ADD COLUMN IF NOT EXISTS train_number VARCHAR(20),
+        ADD COLUMN IF NOT EXISTS train_name VARCHAR(100),
+        ADD COLUMN IF NOT EXISTS route_id UUID,
+        ADD COLUMN IF NOT EXISTS origin_station_id UUID,
+        ADD COLUMN IF NOT EXISTS destination_station_id UUID,
+        ADD COLUMN IF NOT EXISTS departure_time TIMESTAMPTZ,
+        ADD COLUMN IF NOT EXISTS arrival_time TIMESTAMPTZ,
+        ADD COLUMN IF NOT EXISTS locomotive_number VARCHAR(50),
+        ADD COLUMN IF NOT EXISTS remarks TEXT;
+    `);
+
+    await queryRunner.query(`
+      CREATE UNIQUE INDEX IF NOT EXISTS "UQ_trains_train_number"
+        ON freight.trains (train_number)
+        WHERE train_number IS NOT NULL;
+    `);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`DROP INDEX IF EXISTS freight."UQ_trains_train_number"`);
+    await queryRunner.query(`
+      ALTER TABLE freight.trains
+        DROP COLUMN IF EXISTS remarks,
+        DROP COLUMN IF EXISTS locomotive_number,
+        DROP COLUMN IF EXISTS arrival_time,
+        DROP COLUMN IF EXISTS departure_time,
+        DROP COLUMN IF EXISTS destination_station_id,
+        DROP COLUMN IF EXISTS origin_station_id,
+        DROP COLUMN IF EXISTS route_id,
+        DROP COLUMN IF EXISTS train_name,
+        DROP COLUMN IF EXISTS train_number;
+    `);
+  }
+}