Troubleshooting TypeORM Connection Issues with Postgres

Published: 06 September 2025
on channel: vlogize

Discover how to resolve your `TypeORM` connection problems with `Postgres` on your Express app in this step-by-step guide.
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This video is based on the question https://stackoverflow.com/q/63243965/ asked by the user 'Magofoco' ( https://stackoverflow.com/u/9837259/ ) and on the answer https://stackoverflow.com/a/63244300/ provided by the user 'Magofoco' ( https://stackoverflow.com/u/9837259/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Troubleshooting TypeORM Connection Issues with Postgres

If you're building a web application using Express, Postgres, and TypeORM, it's not uncommon to run into connection issues. One common problem developers encounter is when TypeORM fails to connect to Postgres. In this guide, we will discuss a specific scenario involving this issue and provide an in-depth solution to help you get back on track.

The Problem

In a recent issue, a developer was unable to connect TypeORM with Postgres despite the same code working previously. The sequence of events included:

A clear indication that the code was running until a specific line—await createConnection()—where it failed to proceed, meaning the application was stuck at this point.

The developer's environment setup included an index file designed for connection and a correctly set up Postgres database.

A new installation of Postgres was conducted after the old one was removed.

Code Snippet

To elaborate further, here's the relevant index.ts code snippet that the developer was using:

[[See Video to Reveal this Text or Code Snippet]]

The developer also provided the configuration files that were meant to assist in establishing the connection.

The Solution

After troubleshooting, the main oversight was identified: the necessary dependency for Postgres integration was missing from the application. Here's how to resolve the issue.

Step 1: Installing PostgreSQL Driver

If you're using npm, ensure you've installed the PostgreSQL driver by running:

[[See Video to Reveal this Text or Code Snippet]]

If you're a Yarn user, you would run:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Verifying Your Database Configuration

Ensure that your ormconfig.json is set up correctly. Here's a breakdown of what to verify:

Type: Make sure you're using "type": "postgres".

Host: Confirm that the host is set correctly (typically "localhost").

Port: Standard Postgres port is 5432.

Username and Password: Ensure that the username and password match with what you configured in Postgres.

Database: Double-check the database name you've set.

Example of the Correct Configuration:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Restart Your Application

After making the modifications and installations, restart your application:

[[See Video to Reveal this Text or Code Snippet]]

This ensures that your application runs the latest configuration with the newly installed packages.

Conclusion

By addressing the missing PostgreSQL driver dependency and ensuring that your ormconfig.json setup is correct, you should be able to successfully connect TypeORM with Postgres. This solution will help you get your application up and running, so you can continue building your web project without further interruptions.

If you encounter any more issues, don't hesitate to seek out further documentation or community forums for additional assistance!

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