404通过express、mongoose和angular删除mongo文档时

const express = require('express');
const router = express.Router();
const mongoose = require('mongoose');

// 导入mongoose模型
const MyModel = require('../models/myModel');

// 处理DELETE请求
router.delete('/documents/:id', (req, res) => {
  const id = req.params.id;

  // 使用mongoose模型删除文档
  MyModel.findByIdAndDelete(id, (err, result) => {
    if (err) {
      console.error(err);
      res.status(500).send('删除文档时发生错误');
    } else {
      res.send('文档删除成功');
    }
  });
});

module.exports = router;

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Injectable({
  providedIn: 'root'
})
export class MyService {
  private apiUrl = 'http://localhost:3000';

  constructor(private http: HttpClient) { }

  deleteDocument(id: string) {
    const url = `${this.apiUrl}/documents/${id}`;

    // 发送DELETE请求
    return this.http.delete(url);
  }
}

import { Component } from '@angular/core';
import { MyService } from './my.service';

@Component({
  selector: 'app-root',
  template: `
    <button (click)="deleteDocument()">删除文档</button>
  `
})
export class AppComponent {
  constructor(private myService: MyService) { }

  deleteDocument() {
    const id = '123'; // 要删除的文档ID

    this.myService.deleteDocument(id).subscribe(
      () => {
        console.log('文档删除成功');
      },
      (error) => {
        console.error('删除文档时发生错误', error);
      }
    );
  }
}