typescript - 如何访问 typescript/mongoose 中填充文档的字段？

Question

我正在填充 Customer 模型并使用助手类对其进行转换。但我无法访问填充字段的子字段。

订单模型

const orderSchema = new Schema<IOrder>({
  customerID: {
    type: Schema.Types.ObjectId,
    ref: "Customer",
    required: true,
  }
}

export const OrderModel = model<IOrder, IOrderModel>("Order", orderSchema);

订单接口(interface)

export interface IOrder{
  _id?: Schema.Types.ObjectId;
  customerID: Schema.Types.ObjectId;
}

export interface IOrderModel extends Model<IOrder> {
}

订单助手

export class OrderHelper {
  private customer: Schema.Types.ObjectId;

  constructor(model: IOrder) {
    this.customer = model.customerID;
  }
}

订单服务

class OrderService {
  private readonly orderRepository: OrderRepository;

  constructor() {
    this.orderRepository = new OrderRepository();
  }

  public async getProducts(request: Request) {
    const products = await this.orderRepository.findOrders(request.body);
    const data: ProductsHelper[] = [];
    for (let key in products) data.push(new ProductsHelper(products[key]));
    return data;
  }
}

订单存储库

export class OrderRepository {
  constructor() {
  }

public async findOrders(body: Partial<IOrder>) {
  const orders = await OrderModel.find(body)
    .populate({
      path: "customerID",
      select: ["customerCode", "citizenship", "passportSerial"],
    }).lean();
  return orders;
}
}

例如，我想访问 Customer 的 customerCode 字段。但它给我 TypeError 没有 customerCode 字段。我怎么解决这个问题？它与接口(interface)/类型或其他什么有关吗？

Answer 1

您应该在订单接口(interface)和助手中声明客户的类型。然后您将能够访问它的(给定接口(interface)的)字段。