# 프로젝트 생성
django-admin startproject myproject

# 앱 생성
python manage.py startapp myapp

# models.py
from django.db import models

class User(models.Model):
    name = models.CharField(max_length=100)
    email = models.EmailField(unique=True)
    created_at = models.DateTimeField(auto_now_add=True)
    
    def __str__(self):
        return self.name

# urls.py
from django.urls import path
from . import views

urlpatterns = [
    path('users/', views.user_list, name='user_list'),
    path('users/<int:pk>/', views.user_detail, name='user_detail'),
    path('users/create/', views.user_create, name='user_create'),
]

# views.py
from django.shortcuts import render, get_object_or_404
def user_detail(request, pk):
    user = get_object_or_404(User, pk=pk)
    return render(request, 'users/detail.html', {'user': user})

# forms.py
from django import forms
from .models import User

class UserForm(forms.ModelForm):
    class Meta:
        model = User
        fields = ['name', 'email']
    
    def clean_email(self):
        email = self.cleaned_data['email']
        if User.objects.filter(email=email).exists():
            raise forms.ValidationError('이미 사용 중인 이메일입니다.')
        return email

# settings.py
AUTH_USER_MODEL = 'myapp.CustomUser'

# models.py
from django.contrib.auth.models import AbstractUser

class CustomUser(AbstractUser):
    phone = models.CharField(max_length=15, blank=True)
    
    def has_perm(self, perm, obj=None):
        return True

from rest_framework import viewsets
from rest_framework.permissions import IsAuthenticated
from django.core.cache import cache

class UserViewSet(viewsets.ModelViewSet):
    queryset = User.objects.all()
    serializer_class = UserSerializer
    permission_classes = [IsAuthenticated]

@cache_page(60 * 15)  # 15분 캐시
def cached_view(request):
    return render(request, 'cached_template.html')

from celery import shared_task
from django.contrib import admin

@shared_task
def send_notification_email(user_id):
    user = User.objects.get(id=user_id)
    send_mail(
        '알림',
        '새로운 알림이 있습니다.',
        'from@example.com',
        [user.email],
    )

@admin.register(User)
class UserAdmin(admin.ModelAdmin):
    list_display = ['name', 'email', 'created_at']
    list_filter = ['created_at']
    search_fields = ['name', 'email']