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Using Django database layer outside of Django?

Posted by: admin November 30, 2017 Leave a comment

Questions:

I’ve got a nice database I’ve created in Django, and I’d like to interface with through some python scripts outside of my website stuff, so I’m curious if it’s possible to use the Django database API outside of a Django site, and if so does anyone have any info on how it can be done? Google hasn’t yielded many hits for this.

Answers:

You just need to configure the Django settings before you do any calls, including importing your models. Something like this:

from django.conf import settings
settings.configure(
    DATABASE_ENGINE = 'postgresql_psycopg2',
    DATABASE_NAME = 'db_name',
    DATABASE_USER = 'db_user',
    DATABASE_PASSWORD = 'db_pass',
    DATABASE_HOST = 'localhost',
    DATABASE_PORT = '5432',
    TIME_ZONE = 'America/New_York',
)

Again, be sure to run that code before running, e.g.:

from your_app.models import *

Then just use the DB API as usual.

Questions:
Answers:

Update setup_environ is to be removed in django 1.6

If you’re able to import your settings.py file, then take a look at handy setup_environ command.

from django.core.management import setup_environ
from mysite import settings

setup_environ(settings)

#here you can do everything you could in your project

Questions:
Answers:

For django 1.7, I used the following to get up and running.

settings.py:

from django.conf import settings
settings.configure(
    DATABASES={
        'default': {
            'ENGINE': 'django.db.backends.postgresql_psycopg2',
            'NAME': 'name',
            'USER': 'usr',
            'PASSWORD': 'secret',
            'HOST': '127.0.0.1',
            'PORT': '5432',
        },
    },
    TIME_ZONE='America/Montreal',
)

In the file containing the startup routine

import os
import django

import v10consolidator.settings
from myapp.models import *

os.environ.setdefault(
    "DJANGO_SETTINGS_MODULE",
    "myapp.settings"
)
django.setup()

Questions:
Answers:

A final option no-one’s mentioned: a custom ./manage.py subcommand.

Questions:
Answers:

For django 1.5 on (multiple databases are supported) the DATABASE settings also changed.
You need to adapt the previous answer to …

settings.configure(
    DATABASES = { 'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': 'db_name',
        'USER': 'db_usr',
        'PASSWORD': 'db_pass',
        'HOST': '',
        'PORT': '',
        }, },
    TIME_ZONE = 'Europe/Luxembourg'
)

Questions:
Answers:

For using Django ORM from other applications you need:

1) export DJANGO_SETTINGS_MODULE=dproj.settings

2) Add your Django app folder to the path (you can do it in the code of your non-django-app):

sys.path = sys.path + ['/path/to/your/app/']

3) If using SQLite, use the full path to the db file in settings.py:

DATABASE_NAME = '/path/to/your/app/base.db'