mongodb 模式中具有不同 object 类型的数组

Question

i'm developing my application using node.js and mongoose. I have an schema called categories and it contains a key named content , and i need to assign it different types of object, like bellow.

const categorySchema = new Schema({
  label: { type: String, required: true },
  content: [
         { type: Schema.Types.ObjectId, ref: "Videos" },
         { type: Schema.Types.ObjectId, ref: "Games" }
       ]
});

so the object type in typescript would be

content: Array<VideosType | GamesType>

any idea how can i do this?

Answer 1

You can use Schema.Types.Mixed https://mongoosejs.com/docs/schematypes.html#mixed :

const categorySchema = new Schema({
  label: { type: String, required: true },
  content: [{ type: Schema.Types.Mixed }]
}); 

Answer 2

如果你有多种类型，那么你可以创建一个混合类型的数组，它基本上可以接受数组中的任何类型。

content: Array

Answer 3

It worked for me

const PriceFilterSchema = new Schema<PriceFilter>({
  filterType: { type: String, required: true /* PRICE_FILTER */ },
  tickSize: { type: String, required: true },
});
const LotSizeSchema = new Schema<LotSize>({
  filterType: { type: String, required: true /* LOT_SIZE */ },
  stepSize: { type: String, required: true },
});

//Main schema
const SymbolsSchema = new Schema<SymbolType>({
  filters: [
    {
      type: MongooseSchema.Types.Mixed,
      // Here I used enum
      enum: [PriceFilterSchema, LotSizeSchema],
    },
  ],
});

I do not know if type checking is happening, BUT, it closes my needs

1. Display the usage of the scheme
2. Typed use of the entity in the code