对node express server的Angular 7.x查询转换为字符的对象数组

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

@Injectable({
  providedIn: 'root'
})
export class DataService {
  constructor(private http: HttpClient) { }

  getQueryResults(): Promise<any[]> {
    const url = 'http://localhost:3000/api/query'; // 替换为你的node express server的API端点URL
    return this.http.get<any[]>(url).toPromise();
  }
}

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

router.get('/query', (req, res) => {
  // 执行查询逻辑，获取查询结果
  const queryResults = [
    { id: 1, name: 'John' },
    { id: 2, name: 'Jane' },
    { id: 3, name: 'Bob' }
  ];

  // 转换查询结果为字符的对象数组
  const transformedResults = queryResults.map(result => ({
    id: result.id.toString(),
    name: result.name.toUpperCase()
  }));

  // 发送响应
  res.send(transformedResults);
});

module.exports = router;