Deploy Django application to Heroku

Are you worried of deploying a django application, In this blog you can see how to deploy django app to heroku

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Prerequisite:

Postgres database in django

install postgres

sudo apt install postgresql postgresql-contrib

A user with username postgres will be created automatically, so login as postgres user by:

sudo su - postgres

When inside the PostgreSQL shell session, execute the following command to enter the console:

psql

Create database and user

CREATE DATABASE heroku_demo_db;
CREATE USER rahul WITH PASSWORD '123456';
ALTER ROLE rahul SET client_encoding TO 'utf-8';
GRANT ALL PRIVILEGES ON DATABASE heroku_demo_db TO rahul;

install packages for postgresql for django

pip install psycopg2

if this shows some error:

sudo apt-get install libpq-dev python3-dev
# settings.py

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': 'heroku_demo_db', 
        'USER': 'rahul', 
        'PASSWORD': '123456',
        'HOST': '127.0.0.1', 
        'PORT': '5432',
    }
}

Then lets migrate the datas

python manage.py makemigrations
python manage.py migrate

To see the databases:

sudo su - postgres
psql

<!-- To list all tables -->
\l

<!-- To use heroku_demo_db -->
\c heroku_demo_db

<!-- To list all databases in this table -->
\dt

Install heroku cli

sudo snap install --classic heroku

Authenticate heroku

heroku login

Configure django app for heroku

touch Procfile

Open the Procfile and add this:

web: gunicorn projectname.wsgi --log-file -

install some packages

pip install gunicorn dj-database-url whitenoise
pip install psycopg2

if this shows some error:

sudo apt-get install libpq-dev python3-dev

add theese to the requirements.txt

pip freeze > requirements.txt
#  settings.py


MIDDLEWARE = [
    'whitenoise.middleware.WhiteNoiseMiddleware',
 	...   
]

#  Add configuration for static files storage using whitenoise
STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'


# Database settings
import dj_database_url 
prod_db  =  dj_database_url.config(conn_max_age=500)
DATABASES['default'].update(prod_db)

Connecting to heroku

Lets create an app in heroku, the name should be unique

heroku create heroku-deploy-django

Make sure that the allowed host is set

git init 
heroku git:remote -a heroku-deploy-django
git add --all
git commit -m "initial commit"
git push heroku master

If you get an error message with collectstatic, simply disable it by instructing Heroku to ignore running the manage.py collecstatic command during the deployment process.

heroku config:set     DISABLE_COLLECTSTATIC=1  

Otherwise you have to set static url and static root correctly

heroku run python manage.py migrate
heroku run python manage.py createsuperuser

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