Django venv finding old version of PostgreSQL -> django.db.utils.NotSupportedError: PostgreSQL 13 or later is required

I'm resurrecting my local environment for a Django project that I haven't run locally in 2 years, working through issues around things that have gone stale. But I have one a little different: it looks like Django is finding/using an older version of PostgreSQL than the version I see in the venv itself. What's a good approach for tracking down old versions so I can remove them?

When I run python mysite/manage.py runserver, I get

django.db.utils.NotSupportedError: PostgreSQL 13 or later is required (found 10.13).

BUT when I check package versions in the venv I'm running, most packages are current, and PostgreSQL is 3.12.5 (not 13 or later like we'll ultimately need, but also not 10.13).

(from pip list) Django 5.1
(from pip list) psycopg2 2.9.9
(from pip list) psycopg2-binary 2.9.9
(from pip list) psycopg2-pool 1.2
psql -V gives: psql (PostgreSQL) 12.3
python -v gives: Python 3.12.5

Unsurprisingly, if I try a naive uninstall from the venv (pip uninstall postgresql-10.13), it says it's not installed.

What's a good approach for tracing where that 10.13 could be coming from?

Looking in the stack trace this NotSupportedError is raised while connecting to the database, from .venv/lib/python3.12/site-packages/django/db/backends/base/base.py", line 200, in check_database_version_supported

From the venv, my $PATH variable has:

/Users/dkaplan/.vscode/extensions/ms-python.python-2024.12.3-darwin-x64/python_files/deactivate/bash:/Users/dkaplan/family-django/.venv/bin:/Library/Frameworks/Python.framework/Versions/3.12/bin:/Library/Frameworks/Python.framework/Versions/3.12/bin:/Library/Frameworks/Python.framework/Versions/3.10/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/dkaplan/.m2:/Applications/Postgres.app/Contents/Versions/latest/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/Users/dkaplan/.vscode/extensions/ms-python.python-2024.12.3-darwin-x64/python_files/deactivate/bash:/Users/dkaplan/family-django/.venv/bin:/Library/Frameworks/Python.framework/Versions/3.12/bin:/Library/Frameworks/Python.framework/Versions/3.10/bin

My default databases settings is:

DATABASES = {
    "default": {
        "ENGINE": "django.db.backends.postgresql_psycopg2",
        "NAME": DB_DATABASE,
        "USER": DB_USER,
        "PASSWORD": DB_PASSWORD,
        "HOST": DB_HOST,
        "PORT": "5432",
        "OPTIONS": DB_OPTIONS,
    }
}

Solution

Basically you need to upgrade PostgreSQL

dig into pg_upgrade

here are docs https://www.postgresql.org/docs/current/pgupgrade.html

the problem occures because of postgresql database, that is on your machine. It is old :)

It is not a python package, pip won't help here.

Or you can consider dumping db with pg_dump, using something like docker compose version of postgres and django-dbbackup package to restore db