A web project that uses Node.js to implement the online reservation function

Using Node.js to implement a web project for online appointment viewing function

With the rapid development of the Internet, more and more traditional industries have begun to transform online , the real estate industry is no exception. Online appointments for viewings have become an important way for real estate companies to showcase their properties and attract customers. This article will introduce how to use Node.js to implement a simple web project with online booking and viewing function, and provide specific code examples.

1. Project requirements analysis

Before starting coding, we first need to clarify the project requirements. The online reservation function generally includes the following key points:

1. Users can browse the property list and view basic information about each property;
2. Users can select the property they are interested in and fill in the Reservation information (including name, contact information, etc.);
3. Users can view reserved property information and cancel reserved viewing requests;
4. Administrators can log in to the backend management system and manage Property information and viewing appointment list.

2. Technology Selection

In the process of realizing this function, we choose to use the following technologies:

1. Node.js: As a server-side Running environment, using Node.js can achieve high performance and high concurrency server.
2. Express.js: As a Web framework for Node.js, it simplifies the process of writing Web applications.
3. MongoDB: As a database storage system, MongoDB can be used to easily store and query real estate information and reservation lists.

3. Project implementation

1. Create project

First, enter the directory where the project is located on the command line and execute the following command to create a New Node.js project:

mkdir online-house-booking
cd online-house-booking
npm init

According to the prompts, press Enter all the way to generate a new project and generate a package.json file.

2. Installation dependencies

In the project directory, execute the following command to install the Express.js and MongoDB drivers:

npm install express
npm install mongodb

3. Write the server End code

In the project directory, create a app.js file and write the following code:

const express = require('express');
const MongoClient = require('mongodb').MongoClient;
const app = express();
const port = 3000;

// 连接到数据库
MongoClient.connect('mongodb://localhost:27017', (err, client) => {
    if (err) {
        console.error(err);
        return;
    }
    
    const db = client.db('online-house-booking');
    const collection = db.collection('houses');

    // 设置路由
    app.get('/houses', (req, res) => {
        collection.find().toArray((err, houses) => {
            if (err) {
                console.error(err);
                res.sendStatus(500);
                return;
            }
            res.json(houses);
        });
    });

    // 启动服务器
    app.listen(port, () => {
        console.log(`Server running at http://localhost:${port}`);
    });
});

In the above code, we first use MongoClientThe object connects to the local MongoDB database and specifies the database name and collection name. Then, we set up a route /houses. When a user accesses this path, the server will query the real estate information in the database and return it to the client in JSON format.

4. Create database and collection

In the command line, execute the following command to create a database named online-house-booking and add it in Create a collection named houses:

mongo
use online-house-booking
db.createCollection('houses')

5. Add real estate information

In the MongoDB shell, execute the following command to add some real estate information :

db.houses.insertMany([
    { name: '楼盘A', address: '地址A', price: '100万元' },
    { name: '楼盘B', address: '地址B', price: '200万元' },
    { name: '楼盘C', address: '地址C', price: '300万元' }
]);

6. Start the server

In the command line, execute the following command to start the server:

node app.js

7. Test

Visit http://localhost:3000/houses in the browser, you should be able to see the property information returned.

4. Summary

Through the above steps, we successfully used Node.js to implement a simple web project with online reservation and house viewing function. In this project, we used Node.js, Express.js and MongoDB to implement server-side logic and database interaction respectively. Of course, this is just a simple example, and more functions and optimizations are needed in actual projects, but I hope this article can provide you with some inspiration and help.

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