DRF ViewSets и Роутеры

from rest_framework import viewsets, permissions
from .models import Task
from .serializers import TaskSerializer

class TaskViewSet(viewsets.ModelViewSet):
    queryset = Task.objects.all()
    serializer_class = TaskSerializer
    permission_classes = [permissions.IsAuthenticated]

from rest_framework.routers import DefaultRouter
from django.urls import path, include
from .views import TaskViewSet

router = DefaultRouter()
router.register('tasks', TaskViewSet, basename='task')
router.register('projects', ProjectViewSet, basename='project')

urlpatterns = [
    path('api/', include(router.urls)),
]

from rest_framework.decorators import action
from rest_framework.response import Response

class TaskViewSet(viewsets.ModelViewSet):
    queryset = Task.objects.all()
    serializer_class = TaskSerializer

    @action(detail=True, methods=['post'])
    def complete(self, request, pk=None):
        task = self.get_object()
        task.status = 'done'
        task.save()
        return Response({'status': 'completed'})

    @action(detail=False, methods=['get'])
    def my_tasks(self, request):
        tasks = Task.objects.filter(owner=request.user)
        serializer = self.get_serializer(tasks, many=True)
        return Response(serializer.data)

from rest_framework import viewsets

class CategoryViewSet(viewsets.ReadOnlyModelViewSet):
    """Только GET запросы — list и retrieve."""
    queryset = Category.objects.all()
    serializer_class = CategorySerializer