Скачать или смотреть Resolving NestJS TypeOrmModule Database Connection Issues with PostgreSQL

Encountering connection problems with NestJS's `TypeOrmModule`? Learn how to resolve the PostgreSQL error: “no pg_hba.conf entry for host” with effective solutions.
---
This video is based on the question https://stackoverflow.com/q/66086508/ asked by the user 'kyeeego' ( https://stackoverflow.com/u/14727804/ ) and on the answer https://stackoverflow.com/a/66086979/ provided by the user 'kyeeego' ( https://stackoverflow.com/u/14727804/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: NestJS [TypeOrmModule] Unable to connect to the database

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Troubleshooting NestJS TypeOrmModule Connection to PostgreSQL on Heroku

Connecting your NestJS application to a remote PostgreSQL database hosted on Heroku can be an excellent way to leverage the power of cloud computing. However, many developers encounter connection issues that can be frustrating and time-consuming to resolve. One common error message is:

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

In this guide, we will explore this error and how to fix it so you can get your app running smoothly with the database you’ve set up on Heroku.

Understanding the Problem

The error message above typically stems from a couple of issues related to configurations:

Database Access: The PostgreSQL server is rejecting the connection, often due to an SSL configuration problem since Heroku enforces connections via SSL.

Configuration Mismatches: Your NestJS application might not be properly configured to connect using SSL, which is preferred (and required) when using Heroku's PostgreSQL.

Example Code Snippet

Here’s a snippet showing how you might initially set up your app.module.ts to configure the database connection:

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

The issue here is that it’s missing the proper SSL configuration necessary for connecting to a Heroku-hosted PostgreSQL database.

The Solution

To resolve the connection error, you need to modify your configuration object to include SSL settings. Here’s how:

Step 1: Update the Configuration

Add the following lines to your cfg object:

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

Your updated configuration might look something like this:

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

Step 2: Explanation of SSL Configuration

ssl: true: This setting tells TypeORM to use SSL when establishing a connection to the database. Heroku PostgreSQL requires SSL for all connections.

rejectUnauthorized: false: By setting this to false, you allow your application to connect without validating the SSL certificate. This is acceptable for development environments, but it is necessary to obtain and set up a proper SSL certificate for production use.

Step 3: Test the Connection

After making these changes, test your connection again. This should resolve the “no pg_hba.conf entry” error and establish a successful connection to your Heroku PostgreSQL database.

Conclusion

Connecting your NestJS application to a remote PostgreSQL on Heroku does not have to be a daunting task. With the proper SSL configuration in your TypeOrmModule, you can overcome connection hurdles and keep your application running smoothly.

Don't hesitate to reach out to the community or check out the documentation for further assistance. Happy coding!