类型“任务”不满足约束“文档”

Posted 2023-03-11

【中文标题】类型“任务”不满足约束“文档”

【英文标题】：Type 'Task' does not satisfy the constraint 'Document'

【发布时间】：2021-05-13 02:55:36

【问题描述】：

我正在使用 Nestjs 和 Mongodb 创建 API。 tasks.service.ts，试图创建一个 getAll 端点并得到打字稿错误： Type 'Task' does not satisfy the constraint 'Document'. Type 'Task' is missing the following properties from type 'Document': increment, model, $isDeleted, remove, and 51 more.

tasks.service.ts

import  Injectable, HttpStatus  from '@nestjs/common';
import  InjectModel  from '@nestjs/mongoose';
import  Model  from 'mongoose';
import  Task  from './dto/task.inferface';

@Injectable()
export class TasksService 
  private readonly Tasks: Task[] = [];

  constructor(@InjectModel('Task') private readonly TaskModel: Model<Task>) 

  async getAll(): Promise<Task> 
    const tasks = await this.TaskModel.find().exec();
    return tasks;
  

【参考方案1】：

从接口扩展文档类。

import  Document  from 'mongoose';

export interface Task extends Document 
 //Task info ...

【参考方案2】：

任务不应该是 DTO，它应该是这样的实体：

tasks.entity.ts

import  Schema, Prop, SchemaFactory  from '@nestjs/mongoose';
import  Document  from 'mongoose';

@Schema()
export class Task extends Document 
  @Prop()
  name: string;


export const TaskSchema = SchemaFactory.createForClass(Task);

您还需要在模块中注册该模型：

@Module(
  imports: [
    MongooseModule.forFeature([
      
        name: Task.name,
        schema: TaskSchema,
      ,
    ]),
  ],
)

所以你的代码会是这样的

import  Injectable, HttpStatus  from '@nestjs/common';
import  InjectModel  from '@nestjs/mongoose';
import  Model  from 'mongoose';
import  Task  from './entities/task.entity';

@Injectable()
export class TasksService 
  constructor(@InjectModel(Task.name) private readonly TaskModel: Model<Task>) 

  async getAll(): Promise<Task> 
    const tasks = await this.TaskModel.find().exec();
    return tasks;