Django connection guide
Django PostgreSQL Connection Settings
Translate a PostgreSQL URI into Django DATABASES settings and keep SSL options in the right place.
Use the connection value generated by Django, keep it in an environment variable, and test it before changing application code. The URI shape below is a template, not a credential to paste unchanged.
- URI scheme
- postgresql://
- Default PostgreSQL port
- 5432
- Credential handling
- Environment variable or secret manager
- First test
- python manage.py dbshell
Connection string template
postgresql://USER:PASSWORD@HOST:5432/DB_NAME?sslmode=requireReplace every uppercase placeholder. Percent-encode reserved characters in URI usernames and passwords.
Environment variable
DATABASE_URL="postgresql://USER:PASSWORD@HOST:5432/DB_NAME?sslmode=require"Where to get the Django values
Django accepts explicit NAME, USER, PASSWORD, HOST, and PORT settings. Projects that prefer one DATABASE_URL commonly parse it with a small configuration package; the built-in setting is still a mapping.
The failure mode worth checking first
Django's CONN_MAX_AGE controls persistent connections. Long-lived connections can exhaust a small hosted database, while a transaction pooler may require server-side cursors to be disabled.
Test the connection
Run a cheap read-only command before migrations or application startup. That separates network, TLS, and authentication errors from framework configuration problems.
Connection check
python manage.py dbshellOpen it in PostgresGUI
Paste the PostgreSQL URI into PostgresGUI or enter the same host, port, database, user, password, and SSL mode as separate fields. A desktop connection is useful for checking the visible schemas and role permissions before debugging the application layer.
Questions that come up
Should the connection string be committed to Git?
No. Commit an example with placeholders and load the real value from an environment variable or secret manager.
Why does a password with @ or # break the URI?
Those characters have meaning inside a URL. Percent-encode the username and password, or use a structured connection API instead of assembling a URL by hand.
Do I need sslmode=require?
Most hosted PostgreSQL services require TLS. For strict certificate and hostname verification, use sslmode=verify-full with the provider's trusted root certificate when the client supports it.