NestJS MongoDB 嵌套对象模式

NestJS MongoDB nested object schema

我目前运行代码:

export class SystemInformationContent {
  createdAt: number;

  createdBy: User | mongoose.Schema.Types.ObjectId | null;

  updatedAt?: number;

  updatedBy?: User | mongoose.Schema.Types.ObjectId | null;
}

@Schema()
export class SystemInformation {
  @Prop(
    raw({
      createdAt: { type: Number, required: true },
      createdBy: { type: mongoose.Schema.Types.ObjectId, ref: 'User' },
      updatedAt: { type: Number, default: 0 },
      updatedBy: {
        type: mongoose.Schema.Types.ObjectId,
        ref: 'User',
        default: null,
      },
    }),
  )
  system: SystemInformationContent;
}

我没有找到任何方法来“扩展”SystemInformationContent 的架构,因此在 @Prop() 装饰器中使用了 raw() 函数,但我想知道是否有做这样的事情的方法:

export class SystemInformationContent {
  @Prop({ required: true })
  createdAt: number;

  @Prop({ type: mongoose.Schema.Types.ObjectId, ref: 'User' })
  createdBy: User | mongoose.Schema.Types.ObjectId | null;

  @Prop({ default: 0 })
  updatedAt?: number;

  @Prop({ type: mongoose.Schema.Types.ObjectId, ref: 'User', default: null })
  updatedBy?: User | mongoose.Schema.Types.ObjectId | null;
}

@Schema()
export class SystemInformation {
  @Prop(???)
  system: SystemInformationContent;
}

我没有发现任何考虑到 SystemInformationContent.

架构的 SystemInformation.system @Prop() 的工作

你们知道除了 raw 还有其他方法吗?或者我是否遗漏了什么?

编辑:我的 NestJS 应用程序的所有 类 都在扩展 SystemInformation,因此它们看起来都像:

{
  ...,
  system: {
    createdAt: 1616778310610,
    createdBy: "605e14469d860eb1f0641cad",
    editedAt: 0,
    createdBy: null,
  },
}

如果您正在使用 typegoose(7.0 或更高版本),那么如果您在 tsconfig

中启用了 emitDecoratorMetadata,那么您当前拥有的应该足够了

typegoose 示例(下面的代码使用 ~7.4 的选项扩展):

export class SystemInformationContent {
  @Prop({ required: true })
  createdAt: number;

  @Prop({ type: mongoose.Schema.Types.ObjectId, ref: () => User })
  createdBy: Ref<User>;

  @Prop({ default: 0 })
  updatedAt?: number;

  @Prop({ type: mongoose.Schema.Types.ObjectId, ref: () => User }) // default is "undefined"
  updatedBy?: Ref<User>;
}

export class SystemInformation {
  @Prop() // thanks to "emitDecoratorMetadata" no explicit types are needed 
  system: SystemInformationContent;

  // but if wanting to do explicit types
  @Prop({ type: () => SystemInformationContent })
  system: SystemInformationContent;
}

PS: 我不知道你的函数 raw 来自哪里,但这不是 typegoose 函数

如果我做对了,这就是你想要的。您只是错过了 SystemInformationContent@Schema() 注释,并且需要在任何您想要的地方继承这个模式。我有一个类似的问题。所以,如果这不是您要求的,请告诉我。

@Schema()
export class SystemInformationContent {
  // put your @Prop() attributes here, that need to be available in every other schema
}

@Schema()
export class SystemInformation extends SystemInformationContent {
  // no need to do anything else here
  // the attributes are inherited from SystemInformationContent 
}

找到解决方案!

我将 SystemInformationContent 编辑为:

import { Prop, Schema, SchemaFactory } from '@nestjs/mongoose';
import * as mongoose from 'mongoose';
import { User } from '~/schemas/user.schema';

@Schema({ _id: false })
export class SystemInformationContent {
  @Prop({ type: Number, required: true })
  createdAt: number;

  @Prop({ type: mongoose.Schema.Types.ObjectId, ref: 'User' })
  createdBy: User;

  @Prop({ type: Number, default: 0 })
  updatedAt?: number;

  @Prop({
    type: mongoose.Schema.Types.ObjectId,
    ref: 'User',
    default: null,
  })
  updatedBy?: User;
}

export const SystemInformationContentSchema = SchemaFactory.createForClass(
  SystemInformationContent,
);

然后在 SystemInformation 中我编辑为:

import { Prop, Schema } from '@nestjs/mongoose';
import {
  SystemInformationContent,
  SystemInformationContentSchema,
} from '~/schemas/systemInformationContent.schema';

@Schema()
export default class SystemInformation {
  @Prop({ required: true, type: SystemInformationContentSchema })
  system: SystemInformationContent;
}

现在一切正常,我使用 @Schema({ _id: false }) 删除了 SchemaFactory 生成的 ID,所以我最终在数据库中得到了它:

{
  ...,
  "system": {
    "updatedBy": null,
    "updatedAt": 0,
    "createdAt": 1616847116986,
    "createdBy": {
      "$oid": "605f210cc9fe3bcbdf01c95d"
    }
  },
  ...,
}