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This article is about how to connect Node.js programs to MongoDB on CentOS and Fedora. The editor thought it was very practical, so I shared it with you as a reference. Let's follow the editor and have a look.

Step 1: first condition

Let's assume that node.js and mongodb are already installed on the system. If you do not have an installation, you can refer to the following article to complete the required installation.

1. How to install MongoDB on CentOS and Fedora

2. How to install Node.js on CentOS and Fedora

Step 2: install the Mongoose module

Mongoose provides a simple schema-based solution for application data modeling, including built-in type conversion, validation, and so on.

$npm install mongoose

Step 3: connect nodejs to mongodb

Create a test_server.js file and add the following to the file.

/ / Sample script of Node.js with MongoDB Connection// This code requires mongoose node modulevar mongoose = require ('mongoose'); / / Connecting local mongodb database named testvar db = mongoose.connect (' mongodb://127.0.0.1:27017/test'); / / testing connectivitymongoose.connection.once ('connected', function () {console.log ("Database connected successfully")})

Now, let's use node to execute test_server.js. If you receive the message "database connected successfully", the node.js application has successfully connected to the database.

$node test_server.jsDatabase connected successfully Thank you for your reading! On CentOS and Fedora on the Node.js program and MongoDB connection method to share here, I hope the above content can be of some help to you, so that you can learn more knowledge. If you think the article is good, you can share it and let more people see it.

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