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Understanding Ports and Connection Strings in Sails.js with Node.js

Understanding Ports and Connection Strings in Sails.js with Node.js By sprwork InfoSolutions
Understanding Ports and Connection Strings in Sails.js with Node.js By sprwork InfoSolutions

When working with Sails.js, a powerful MVC framework for Node.js, it’s essential to grasp the concepts of ports and connection strings. These elements play a crucial role in establishing connections to databases, and external services, and determining how your application listens for incoming requests. In this blog post, we will dive into the details of defining ports and connection strings in Sails.js, and how they contribute to the overall functioning of your Node.js application. Discover the power of the Sails.js framework for Node.js and accelerate your web development projects with the convenience of Web Development Packages.

Defining Ports:

In Sails.js, a port refers to a numeric identifier that designates a specific endpoint through which your application communicates. A port number can range from 0 to 65535, with certain reserved port numbers for specific services. Sails.js utilizes port 1337 by default, but you can change it to suit your requirements.

To define a port, open the config/env/development.js file in your Sails.js project, and modify the port property as shown below:

module.exports = {

  port: 3000,              // Your desired port number// 



Once you’ve set the desired port, save the file and start your Sails.js application. It will now listen for incoming requests on the specified port.

Connection Strings:

Connection strings are used to establish connections between your Sails.js application and various databases or external services. These strings contain all the necessary information required for the application to connect successfully.

To define a connection string, you typically need to access the development.js file located in the config folder. In this file, you’ll find configurations for various databases and services your application interacts with. Let’s consider an example of configuring a connection to a MongoDB database. Open the development.js file and modify the default configuration as follows:

module.exports = {

  default: {

    adapter: require(‘sails-mongo’),  

   url : ‘mongodb://




In the example above, we are using the ‘sails-mongo’ adapter and specifying the connection URL for a local MongoDB database. Make sure to replace localhost, 5432, and database with your actual credentials and database details.

You can also define multiple connection configurations for different databases or services within the datastores.js file. By specifying a different adapter and URL, you can establish connections to MongoDB, MySQL, Redis, or any other supported data stores.


Understanding how to define ports and connection strings is crucial for building robust and scalable applications with Sails.js and Node.js. By configuring the appropriate port, you can ensure that your application listens on the desired endpoint, while connection strings enable seamless integration with databases and external services.

In this blog post, we explored the process of defining ports and connection strings in Sails.js. By following these guidelines, you’ll be well-equipped to efficiently handle connections and data storage in your Sails.js applications. Remember to refer to the official Sails.js documentation for additional information and specific use cases.

Happy coding with Sails.js and Node.js!

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