Django Getting Started

Create virtualenv and source it

Install packages

Django==3.1.3
djangorestframework==3.12.2
psycopg2-binary==2.8.6

Start project and move to the newly created directory

$ django-admin startproject my-project
$ cd my-project

Update DB Information - in this example we are adding postgres database

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'OPTIONS': {
            'options': '-c search_path=public'
        },
        'NAME': 'my_db_name',
        'USER': 'my_db_user',
        'PASSWORD': 'my_db_pass',
        'HOST': 'my_db_server_ip',
        'PORT': 'my_db_server_port',
    }
}

Start App for my-app
```
python manage.py startapp my-app
```

Add this app in project settings.py -> my-project/settings.py

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'my-app',
]

Create my-app models my-app/models.py
- Allows us to create and define tables in database.
Make Migrations
- Make migrations
```
python manage.py makemigrations
```
- Migrate
```
python manage.py migrate
```
  Note
  
  DO NOT DELETE OLD MIGRATION FILES AND KEEP THEM IN SOURCE CODE
Create Seriliaser my-app/serializers.py
- Allows us to access and update items in database using models.
Update views my-app/views.py.
- Allows us to render response associated with URLs.
  - Custome API response
  - Render HTTPResponse
Update url's my-app/urls.py
- Allows us to define URL paths
Update project url my-project/urls.py to allow URLs defined for our app.
```
urlpatterns = [
    path('', include('my-app.urls'))
]
```