How Django Works? - 01

Making mysite file

• On terminal, $ django-admin startproject mysite will make a file called 'mysite' on selected directory.
• Under mysite file, these python files exist.
  

What do these individual files do?

manage.py

• Django 프로젝트와 다양한 방법으로 상호작용 하는 커맨드라인의 유틸리티 입니다.

__init__.py

• Python으로 하여금 이 디렉토리를 패키지처럼 다루라고 알려주는 용도의 단순한 빈 파일입니다.

settings.py

• 현재 Django 프로젝트의 환경 및 구성을 저장합니다.

urls.py

• 현재 Django project 의 URL 선언을 저장합니다. Django 로 작성된 사이트의 "목차" 라고 할 수 있습니다.

Running the server

$ python manage.py runserver will start the server.

Making a website called polls

$ python manage.py startapp polls

1. polls/view.py

• A view function is a Python function that takes a Web Request and returns a Web resopnse.

from django.http import HttpResponse
def index(request):
	return HttpResponse("Hello, world. You're at the polls index.")

• In order to call view, we need an url that connects to the view. So, we need to created urls.py to create URLconf. (A URLconf is a mapping between URLs and the view functions that should be called for those URLs.)

2. polls/urls.py

from django.urls import path
from . import views

urlpatterns = [
	path('', views.index, name='index'),
]

3. mysite/urls.py

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

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

• Here, include() function lets you have access to other URLconf.
• When Django meets include(), it cuts the part of URL up to that point, and return the rest to URLconf.
• For example, path('ads.txt', views.ads) means when the web client asks for 'ads.txt', 'ads' from home/views.py is called.
• When you use different URL patters, you must use include(), with the exception of admin.site.urls