Connecting to PostgreSQL using TypeORM
Explore the process of establishing a robust connection between NestJS and PostgreSQL using TypeORM. Learn to install essential packages, configure your database connection, define entities, and integrate them into your application for scalable and persistent data management.
In the previous sections, we explored building a virtual library storing books in application memory. While straightforward, this approach has significant drawbacks. It limits scalability and offers no data persistence. For instance, a server restart wipes out all stored books, making the library volatile and unreliable. This section will set up a robust, permanent storage solution using a PostgreSQL database and TypeORM.
Installation
We need to install several essential dependencies to proceed with the setup. These include the database driver for PostgreSQL and the NestJS ORM library, TypeORM.
Note: When following along this course, the packages are preinstalled. You can run the command below if you’re on a local setup.
Run the following command to install the required packages: