如何使用mongoose中的find方法根据文档中引用的数据过滤文档？

Question

I am working on e-commerce like app. I have orderItem Schema

const orderItemsSchema = mongoose.Schema(
  {
    order: {
      type: mongoose.Schema.Types.ObjectId,
      ref: 'OrderItems',
      required: true,
    },
    product: {
      type: mongoose.Schema.Types.ObjectId,
      ref: 'Products',
      required: true,
    },
    quantity: {
      type: Number,
      default: 1,
    },
    subCost: {
      type: Number,
      required: true,
    },
  },
  {
    timestamps: true,
  }
);

Where product schema has a field "owner" which is also a reference.

I am expecting to get orderItems based on owners of the products.

For Example: A owner want to check which products of him has been sold. So he will query orderItems to get his sold items.

Answer 1

I'm not an expert in mongoose, so maybe the syntax is not entirely correct:

// You get all products _id that owner currently sells
const yourOwnerObjectId = mongoose.Types.ObjectId(yourOwnerId); // Create the objectId from a string
const productsOwner = Products.find({owner: yourOwnerObjectId}).select({_id: 1})

// You get all orders that contains any of previous product _id
const orderWithProductsSold = OrderItems.find({_id: {$in: productsOwner}})

I'm not sure about what returns the first query regarding _id . Maybe you have to do some type of casting to ObjectId or whatever to perform the second query, but I think the idea is right.