Node.js
Learn how to connect to MongoDB databases in Sealos DevBox using Node.js
This guide will walk you through the process of connecting to a MongoDB database using Node.js within your Sealos DevBox project.
Prerequisites
- A Sealos DevBox project with Node.js environment
- A MongoDB database created using the Database app in Sealos
Install Required Packages
In your Cursor terminal, install the necessary packages:
This command installs:
mongodb
: The official MongoDB driver for Node.jsdotenv
: A zero-dependency module that loads environment variables from a.env
file
Connection Setup
Set up the environment variables
First, let's set up the environment variables for our database connection. Create a .env
file in your project root with the following content:
Replace the placeholders with your actual MongoDB credentials from the Database app in Sealos.
Create a connection file
Next, create a file named db.js
with the following content:
This file creates a MongoDB client and exports a function to connect to the database.
Create database operations
Now, let's create a file named dbOperations.js
to handle our database operations:
Create a main script
Finally, let's create a main.js
file to demonstrate all the operations:
Usage
To run the script, use the following command in your Cursor terminal:
This will execute all the operations defined in the main
function, demonstrating the connection to the database, document creation, reading, updating, and deletion.
Best Practices
- Use environment variables for database credentials.
- Use connection pooling for better performance (MongoDB driver handles this automatically).
- Always handle potential errors using try-catch blocks.
- Close the database connection after operations are complete.
- Use indexes for frequently queried fields to improve performance.
Troubleshooting
If you encounter connection issues:
- Verify your MongoDB credentials in the
.env
file. - Ensure your MongoDB database is running and accessible.
- Check for any network restrictions in your DevBox environment.
- Confirm that the
mongodb
package is correctly installed.
For more detailed information on using MongoDB with Node.js, refer to the official MongoDB Node.js driver documentation.
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