Django 4 : Install2022/08/26

	Install Django which is Python Web Application Framework.
[1]	Install Django under the Python venv. It's possible to do for any common user.

ubuntu@dlp:~$

python3 -m venv --system-site-packages ~/django

ubuntu@dlp:~$

source ~/django/bin/activate

(django) ubuntu@dlp:~$

pip3 install 'Django>=4,<5'

Collecting Djangolt;5,>=4
  Downloading Django-4.1-py3-none-any.whl (8.1 MB)
Collecting asgiref<4,>=3.5.2
  Downloading asgiref-3.5.2-py3-none-any.whl (22 kB)
Collecting sqlparse>=0.2.2
  Downloading sqlparse-0.4.2-py3-none-any.whl (42 kB)
Installing collected packages: sqlparse, asgiref, Django
Successfully installed Django-4.1 asgiref-3.5.2 sqlparse-0.4.2

(django) ubuntu@dlp:~$ django-admin --version 4.1

# to exit from venv, run like follows

(django) ubuntu@dlp:~$

deactivate

ubuntu@dlp:~$

[2]	Create a test project. If Firewalld is running and also access to Django from other Hosts, Allow ports you plan to use with root privilege before it. (example below uses [8000/tcp])

ubuntu@dlp:~$

source ~/django/bin/activate

# create testproject

(django) ubuntu@dlp:~$

django-admin startproject testproject

(django) ubuntu@dlp:~$

cd testproject

# configure database (default is SQLite)

(django) ubuntu@dlp:~/testproject$

python manage.py migrate

# create admin user

(django) ubuntu@dlp:~/testproject$

python manage.py createsuperuser

Username (leave blank to use 'ubuntu'):

ubuntu

Email address:

ubuntu@dlp.srv.world

Password:
Password (again):
Superuser created successfully.

(django) ubuntu@dlp:~/testproject$

vi testproject/settings.py

# line 28 : set if you allow to access to Django from other Hosts
# specify Hosts with comma separated
# if allow all, specify like follows

ALLOWED_HOSTS = [

'*'

]

# start server

(django) ubuntu@dlp:~/testproject$

python manage.py runserver 0.0.0.0:8000

Watching for file changes with StatReloader
Performing system checks...

System check identified no issues (0 silenced).
August 26, 2022 - 02:05:47
Django version 4.1, using settings 'testproject.settings'
Starting development server at http://0.0.0.0:8000/
Quit the server with CONTROL-C.

[4]	Access to the [(server's hostname or IP address):8000/] from a client computer. It's OK if following site is displayed normally.

[5]	It's possible to use admin site on [(server's hostname or IP address):8000/admin].

[6]	Create a test application to try to use Django.

ubuntu@dlp:~$

source ~/django/bin/activate

(django) ubuntu@dlp:~$

cd testproject

(django) ubuntu@dlp:~/testproject$

python manage.py startapp test_app

(django) ubuntu@dlp:~/testproject$

vi test_app/views.py

# add to the end

from django.http import HttpResponse
def main(request):
    html = '<html>\n' \
           '<body>\n' \
           '<div style="width: 100%; font-size: 40px; font-weight: bold; text-align: center;">\n' \
           'Django Test Page\n' \
           '</div>\n' \
           '</body>\n' \
           '</html>\n'
    return HttpResponse(html)

(django) ubuntu@dlp:~/testproject$

vi testproject/urls.py

# line 17, 21 : add like follows

from django.contrib import admin
from django.urls import path, include

urlpatterns = [
    path('admin/', admin.site.urls),
    path('test_app/', include('test_app.urls')),
]

(django) ubuntu@dlp:~/testproject$

vi test_app/urls.py

# create new

from django.urls import path
from .views import main

urlpatterns = [
    path('', main, name='home')
]

(django) ubuntu@dlp:~/testproject$

vi testproject/settings.py

# line 33 : add test application in [INSTALLED_APPS] section

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'test_app',
)

(django) ubuntu@dlp:~/testproject$

python manage.py runserver 0.0.0.0:8000

[7]	Access to the [(server's hostname or IP address):8000/testapp/] from a client computer. It's OK if testapp is displayed normally.

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