类型“对象”不满足约束“文档”答案

【问题标题】：Type 'Object' does not satisfy the constraint 'Document'类型“对象”不满足约束“文档”
【发布时间】：2021-01-22 13:30:57
【问题描述】：

我正在尝试运行 MERN 应用程序来验证它有什么，但它在几个文件中向我发送了这个错误。

错误：类型“CatalogType”不满足约束“文档”。 “CatalogType”类型缺少“Document”类型中的以下属性：$ignore、$isDefault、$isDeleted、$isEmpty 和 45 个以上。ts(2344)

我的代码：

const {
      Types: { ObjectId },
    } = Schema;
    
    export interface CatalogType {
      _id: any;
      code: string;
      description: string;
      version: number;
    }
    
export interface CatalogDocumentType extends Document,CatalogType{
      _id: number;
    }
    
export const schema = new Schema<CatalogType>(
      {
        id: {
          type: ObjectId,
        },
        code: {
          type: String,
          required: true,
        },
        description: {
          type: String,
          required: false,
        },
        version: {
          type: Number,
          required: false,
        },
      },
      {
        timestamps: {
          currentTime: () => new TimeZone().getLocaleCSTfromGMT(),
        },
      },
    );
    
export const Model = model<CatalogDocumentType>('Catalog', schema);

请帮帮我！

【问题讨论】：

标签： node.js mongodb typescript express mongoose

【解决方案1】：

泛型类Schema的泛型参数有泛型约束，见index.d.ts。

class Schema<DocType extends Document = Document, M extends Model<DocType> = Model<DocType>> extends events.EventEmitter {/**..*/}

泛型参数DocType 必须满足Document 类型约束。所以正确的做法是：

import { Schema, model, Document, Model } from 'mongoose';

const {
  Types: { ObjectId },
} = Schema;

export interface CatalogTypeDocument extends Document {
  _id: number;
  code: string;
  description: string;
  version: number;
}

export interface CatalogTypeModel extends Model<CatalogTypeDocument> {}

export const schema = new Schema<CatalogTypeDocument>({
  id: {
    type: ObjectId,
  },
  code: {
    type: String,
    required: true,
  },
  description: {
    type: String,
    required: false,
  },
  version: {
    type: Number,
    required: false,
  },
});

export const CatalogTypeModel = model<CatalogTypeDocument, CatalogTypeModel>('Catalog', schema);

欲了解更多信息，请参阅mongoosejs-typescript-docs

软件包版本：

"mongoose": "^5.11.9",
"@types/mongoose": "^5.10.3",
"typescript": "^3.7.2"

【讨论】：