What is Django class-based vs function-based views?

Question

Accepted Answer

**Function-based views (FBV)** are simpler. **Class-based views (CBV)** provide reuse via inheritance.

```python
# Function-based view
from django.http import JsonResponse

def user_list(request):
    if request.method == "GET":
        users = list(User.objects.values())
        return JsonResponse(users, safe=False)
    elif request.method == "POST":
        data = json.loads(request.body)
        user = User.objects.create(**data)
        return JsonResponse({"id": user.id}, status=201)

# Class-based view
from django.views.generic import ListView, CreateView
from django.urls import reverse_lazy

class UserListView(ListView):
    model = User
    template_name = "users/list.html"
    context_object_name = "users"
    paginate_by = 20

class UserCreateView(CreateView):
    model = User
    fields = ["name", "email"]
    template_name = "users/create.html"
    success_url = reverse_lazy("user-list")

# Generic views (DRF)
from rest_framework import generics

class UserListCreate(generics.ListCreateAPIView):
    queryset = User.objects.all()
    serializer_class = UserSerializer
```

**When to use:**
- **FBV**: simple logic, full control.
- **CBV**: CRUD operations, reuse, Django conventions.

Python: What is Django class-based vs function-based views?