Nestjs, Transactions, Dependency Injection, Repository Pattern, Repository Design Pattern.
'typeorm'; import { Order } from '../orders/orders.entity'; import { Product } from '../products/products.entity'; @Entity() export class Item { @PrimaryGeneratedColumn() id: number; @Column() quantity: number; @ManyToOne((type) => Order, (order) => order.items) order: Order; @ManyToOne((type) =>