raspberry-pi-apache-django-cheatsheet.txt

CREATE WEB SERVER
From: https://pimylifeup.com/raspberry-pi-apache/

1. Install apache
  $ sudo apt-get update
  $ sudo apt-get upgrade
  $ sudo apt install apache2 -y
  
2. Permissions
  $ sudo usermod -a -G www-data pi
  $ sudo chown -R -f www-data:www-data /var/www/html

SETUP DJANGO FRAMEWORK
From: https://pimylifeup.com/raspberry-pi-django/

1. Install packages
  $ sudo apt install libapache2-mod-wsgi-py3
  $ sudo apt install python3 python3-venv python3-pip
  
2. Configuring Apache for Django
  $ sudo nano /etc/apache2/sites-enabled/000-default.conf
  Add above </VirtualHost>:
  Alias /static /home/pi/pidjango/static
    <Directory /home/pi/pidjango/static>
        Require all granted
    </Directory>

    <Directory /home/pi/pidjango/pidjango>
        <Files wsgi.py>
            Require all granted
        </Files>
    </Directory>
    WSGIDaemonProcess django python-path=/home/pi/pidjango python-home=/home/pi/pidjango/djenv
    WSGIProcessGroup django
    WSGIScriptAlias / /home/pi/pidjango/pidjango/wsgi.py
    
3. Restart apache
  $ sudo systemctl restart apache2
  If error occurs, check for typos and apache status:
  $ systemctl status apache2.service
  Re-instalation of apache2 and ibapache2-mod-wsgi-py3 usualy helps :)
  
4. Setup Django project
  $ mkdir -p /home/pi/pidjango/static
  $ cd /home/pi/pidjango
  $ python3 -m venv djenv
  $ source djenv/bin/activate
  $ python3 -m pip install django
  $ django-admin startproject pidjango .
  $ hostname -I
  $ nano /home/pi/pidjango/pidjango/settings.py
  Change:
  ALLOWED_HOSTS = ["YOURIPADDRESS"]
  Open browser: https://[YOURPIIPADDRESS] without running the Django server!

5. Additional setup
  Create superuser:
  $ cd /home/pi/pidjango
  $ python3 manage.py createsuperuser
  
  Re-create /static folder:
  Add to the end of the settings.py file:
  STATIC_ROOT = os.path.join( BASE_DIR, "static/")
  $ cd /home/pi/pidjango
  $ python3 manage.py collectstatic
  
  Make database writable:
  https://stackoverflow.com/questions/34173547/django-apache-error-attempt-to-write-a-readonly-database
  $ cd /home/pi/pidjango
  $ chmod 755 db.sqlite3
  
  Change ownerships:
  $ cd /home/pi/pidjango
  $ sudo chown -R -f www-data:www.data db.sqlite3
  $ sudo chown -R -f www-data:www.data .

IMPORTANT NOTES!
- if you want to install aditional python packages (ex. ppi install djangorestframework) or try to migrate models (python3 manage.py migrate) you could encouter problems with permissions. 
  I deal wit that in following way:
  1. Give ownership to pi user:
    $ sudo chown -R pi:pi . 
  2. Make changes
  3. Return ownership to www-data
    $ sudo chown -R -f www-data:www.data db.sqlite3
    $ sudo chown -R -f www-data:www.data .
 If yoou have better idea, please contact me!
 
 - run `$ sudo systemctl restart apache2` for every change in the django code