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Configuring SQLAlchemy with PostgreSQL on Heroku: A Quick Guide
Code November 08, 2024
python
- When you provision a PostgreSQL database on Heroku, it sets an environment variable called
DATABASE_URLwith the connection string for your database. - This URI uses the format
postgres://.
- SQLAlchemy (especially when using the
psycopg2driver for PostgreSQL) requires the URI to be in the formatpostgresql+psycopg2://. - This prefix specifies the dialect (
postgresql) and the driver (psycopg2) explicitly, which SQLAlchemy uses to establish the connection.