📚 Cheatsheet

# apps.py
from django.apps import AppConfig

class MonappConfig(AppConfig):
    #...
    def ready(self):
        import monapp.signals

# settings.py
MIDDLEWARE = [
    # ...
    'monapp.middleware.MonMiddleware',
]

# monapp/templatetags/custom_filters.py
from django import template

register = template.Library()

@register.filter
def en_majuscules(valeur):
    return valeur.upper()

# monapp/middleware.py
class MonMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        # Code exécuté avant la vue
        response = self.get_response(request)
        # Code exécuté après la vue
        return response

# signals.py
from django.db.models.signals import post_save
from django.dispatch import receiver
from .models import Article

@receiver(post_save, sender=Article)
def ma_fonction_apres_sauvegarde(sender, instance, created, **kwargs):
    if created:
        print(f'Article "{instance.titre}" créé !')

{% load custom_filters %}
{{ "bonjour"|en_majuscules }}

# views.py
from django.views.generic.edit import CreateView
from django.urls import reverse_lazy

class ArticleCreateView(CreateView):
    model = Article
    fields = ['titre', 'contenu']
    success_url = reverse_lazy('liste_articles')

# views.py
from django.views.generic import DetailView

class ArticleDetailView(DetailView):
    model = Article

# views.py
from django.views.generic import ListView
from .models import Article

class ArticleListView(ListView):
    model = Article
    template_name = 'article_list.html'