Mongoose - 验证不同子文档类型的数组

Posted 2023-03-10

【中文标题】Mongoose - 验证不同子文档类型的数组

【英文标题】：Mongoose - Validate array of different subdocuments types

【发布时间】：2018-04-15 17:08:21

【问题描述】：

我有一个包含不同子文档类型数组的架构。 下面的架构只是一个例子：

VehicleSchema：

let BikeSchema = new Schema(
  title       :  type: String, required: [true, 'title is required'] ,
  type        :  type: String, required: true, default: "bike" ,
  tyres       :  type: Number, required: true, min: 2
);

let TruckSchema = new Schema(
  title       :  type: String, required: [true, 'title is required'] ,
  type        :  type: String, required: true, default: "truck" ,
  tyres       :  type: Number, required: true, min: 4,
  doors       :  type: Number, required: true
);

let VehicleSchema = new Schema(
  name: type:String, required: [true, 'name is required'],
  vehiclesSelected: [BikeSchema, TruckSchema],
);

Below is the json that I need to validate:
vehicle = 
  "name": 'abc',
  "vehiclesSelected": [
    "type": "truck", doors: 2,
    "type": "bike", tyres: 3,
    "type": "bike"
  ]

现在我需要根据 JSON 中传递的“类型”来验证“vehiclesSelected”数组。有人可以告诉我如何验证 基于特定字段（在本例中为“类型”）的子文档数组？

任何帮助将不胜感激。

【问题讨论】：

我也遇到了同样的问题，也期待有人帮助我。干杯

如果您设法找到解决方案，请告诉我。

vehiclesSelected: [BikeSchema, TruckSchema] --> 你能做到吗？最新版本的 Mongoose 是否支持？

【参考方案1】：

你可以使用 Mongoose 的 discriminator() 函数。

在你的情况下，你可以做的是：

let BikeSchema = new Schema(
  title       :  type: String, required: [true, 'title is required'] ,
  tyres       :  type: Number, required: true, min: 2
);

let TruckSchema = new Schema(
  title       :  type: String, required: [true, 'title is required'] ,
  tyres       :  type: Number, required: true, min: 4,
  doors       :  type: Number, required: true
);

let typeVehicleSchema = new Schema(,
discriminatorKey: 'type', _id: false)

let VehicleSchema = new Schema(
  name: type:String, required: [true, 'name is required'],
  vehiclesSelected: [typeVehicleSChema],
);

VehicleSchema.path('vehiclesSelected').discriminator('truck', new Schema(TruckSchema))
VehicleSchema.path('vehiclesSelected').discriminator('bike', new Schema(BikeSchema))

这样，根据车辆类型，您的架构将根据传入的“类型”使用适当的子类型进行验证，两者都继承父架构（在本例中为 typeVehicleSchema）。