使用mongodb和nodejs时表单字段不更新到数据库Angular

npm install mongodb

const { MongoClient } = require('mongodb');

// Connection URL
const url = 'mongodb://localhost:27017';

// Database Name
const dbName = 'mydatabase';

// Create a new MongoClient
const client = new MongoClient(url);

// Connect to the MongoDB server
client.connect(function(err) {
  if (err) {
    console.error('Failed to connect to MongoDB:', err);
    return;
  }

  console.log('Connected successfully to MongoDB');

  const db = client.db(dbName);

  // Perform database operations here

  // Close the connection
  client.close();
});

// Assuming 'db' is the MongoDB database object

// Get the 'users' collection
const collection = db.collection('users');

// Update a document
collection.updateOne(
  { _id: ObjectId('documentId') }, // Filter
  { $set: { name: 'New Name' } }, // Update
  function(err, result) {
    if (err) {
      console.error('Failed to update document:', err);
      return;
    }

    console.log('Document updated successfully');
  }
);

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

// Inject the HttpClient in the constructor
constructor(private http: HttpClient) {}

// Update the form field
updateFormField(formField: any) {
  const url = 'http://localhost:3000/updateFormField'; // Replace with your backend URL

  // Send a POST request with the form field data
  this.http.post(url, formField).subscribe(
    (response) => {
      console.log('Form field updated successfully');
    },
    (error) => {
      console.error('Failed to update form field:', error);
    }
  );
}