FROM python:3.12.5-slim
ENV PYTHONUNBUFFERED=1

WORKDIR /django_udemy
COPY . /django_udemy/
RUN pip install --upgrade pip && \
        pip install -r requirements.txt

services:
  app:
    build: .
    ports:
      - '8000:8000'
    volumes:
      - .:/django_udemy
    tty: true
    stdin_open: true
    command: /bin/bash

Django==4.2.16

from django.contrib import admin
from .models import TodoModel


# Register your models here.
class TodoAdmin(admin.ModelAdmin):
    list_display = ("title", "priority", "duedate")
    search_fields = ("title",)
    list_filter = ("priority", "duedate")


admin.site.register(TodoModel, TodoAdmin)

{% extends 'base.html' %}

{% block content %}
<form method="POST" enctype="multipart/form-data">{% csrf_token %}
        <p><input type="text" name="title" placeholder="title"></p>
        <p><input type="text" name="content" placeholder="content"></p>
        <p><input type="file" name="sns_image"></p>
        <input type="hidden" name="author" value="{{ user.username }}">
        <input type="submit" value="create">
</form>
{% endblock %}

from django.urls import include, path

urlpatterns = [
    # polls/urls.pyをインクルード
    path('polls/', include('polls.urls')),          # => /polls/...
    path('fun_polls/', include('polls.urls')),      # => /fun_polls/...
    path('content/polls/', include('polls.urls')),  # => /content/polls/...
]

# polls/urls.py
urlpatterns = [
    path('', views.index, name='index'),           # インデックスページ
    path('<int:pk>/', views.detail, name='detail') # 詳細ページ
]

/polls/                  -> インデックスページ
/polls/34/               -> ID 34の詳細ページ

/fun_polls/              -> 同じインデックスページ
/fun_polls/34/           -> 同じID 34の詳細ページ

/content/polls/          -> 同じインデックスページ
/content/polls/34/       -> 同じID 34の詳細ページ

question = models.ForeignKey(Question, on_delete=models.CASCADE)

from django.shortcuts import render
from django.http import HttpResponse
from .models import Question


# Create your views here.
def index(request):
    latest_question_list = Question.objects.order_by("-pub_date")[:5]
    output = ", ".join([q.question_text for q in latest_question_list])
    return HttpResponse(output)

# この時点ではまだSQLは実行されていない
questions = Question.objects.order_by("-pub_date")

# 以下のようなタイミングで実際にSQLが実行される
# 1. リストに変換時
list_questions = list(questions)

# 2. イテレーション時
for question in questions:
    print(question)

# 3. スライス時
first_five = questions[:5]

from django.shortcuts import render
from django.http import HttpResponse
from .models import Question
from django.template import loader


# Create your views here.
def index(request):
    latest_question_list = Question.objects.order_by("-pub_date")[:5]
    template = loader.get_template("polls/index.html")
    context = {"latest_question_list": latest_question_list}
    return HttpResponse(template.render(context, request))

from django.shortcuts import render

def index(request):
    latest_question_list = Question.objects.order_by("-pub_date")[:5]
    context = {"latest_question_list": latest_question_list}
    return render(request, "polls/index.html", context)

 from django.urls import path

 from . import views

+ app_name = "polls"
 urlpatterns = [
     path("", views.index, name="index"),
     path("<int:question_id>/", views.detail, name="detail"),
     path("<int:question_id>/results/", views.results, name="results"),
     path("<int:question_id>/vote/", views.vote, name="vote"),
 ]

- <li><a href="{% url 'detail' question.id %}">{{ question.question_text }}</a></li>
+ <li><a href="{% url 'polls:detail' question.id %}">{{ question.question_text }}</a></li>

# プロジェクトのsettings.py
STATIC_URL = 'static/'

# 開発環境での静的ファイル設定
STATICFILES_DIRS = [
    BASE_DIR / "static",
]

# 本番環境用（必要な場合）
STATIC_ROOT = BASE_DIR / 'staticfiles'

$ python -c "import django; print(django.__path__)"

DATABASES = {
    'default': {
        ..
        'ATOMIC_REQUESTS': True,  # 追加
    }
}

SECURE_SSL_REDIRECT = True