second

todos/admin.py

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+from django.contrib import admin
+
+# Register your models here.

todos/apps.py

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+from django.apps import AppConfig
+
+
+class TodosConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'todos'

todos/migrations/0001_initial.py

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+# Generated by Django 4.2 on 2025-01-15 13:36
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Todo',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('title', models.CharField(max_length=200)),
+                ('completed', models.BooleanField(default=False)),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+    ]

todos/models.py

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+from django.db import models
+from django.contrib.auth.models import User
+
+class Todo(models.Model):
+    user = models.ForeignKey(User, on_delete=models.CASCADE)
+    title = models.CharField(max_length=200)
+    completed = models.BooleanField(default=False)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    def __str__(self):
+        return self.title
+

todos/serializers.py

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+from rest_framework import serializers
+from django.contrib.auth.models import User
+from .models import Todo
+
+class UserSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = User
+        fields = ('id', 'username')
+        extra_kwargs = {'password': {'write_only': True}}
+
+    def create(self, validated_data):
+        user = User.objects.create_user(
+            username=validated_data['username'],
+            password=validated_data['password']
+        )
+        return user
+
+class TodoSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Todo
+        fields = ('id', 'title', 'completed', 'created_at')

todos/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

todos/urls.py

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+from django.urls import path, include
+from rest_framework.routers import DefaultRouter
+from .views import TodoViewSet, register_user, login_user
+
+router = DefaultRouter()
+router.register(r'todos', TodoViewSet, basename='todo')
+
+urlpatterns = [
+    path('', include(router.urls)),
+    path('register/', register_user, name='register'),
+    path('login/', login_user, name='login'),
+]

todos/views.py

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+from rest_framework import viewsets, permissions, status
+from rest_framework.response import Response
+from rest_framework.decorators import api_view, permission_classes
+from django.contrib.auth import authenticate
+from rest_framework_simplejwt.tokens import RefreshToken
+from .models import Todo
+from .serializers import TodoSerializer, UserSerializer
+import logging
+
+logger = logging.getLogger(__name__)
+
+@api_view(['POST'])
+@permission_classes([permissions.AllowAny])
+def register_user(request):
+    serializer = UserSerializer(data=request.data)
+    if serializer.is_valid():
+        user = serializer.save()
+        refresh = RefreshToken.for_user(user)
+        return Response({
+            'token': str(refresh.access_token),
+        })
+    return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+
+@api_view(['POST'])
+@permission_classes([permissions.AllowAny])
+def login_user(request):
+    username = request.data.get('username')
+    password = request.data.get('password')
+    user = authenticate(username=username, password=password)
+    if user:
+        refresh = RefreshToken.for_user(user)
+        return Response({
+            'token': str(refresh.access_token),
+        })
+    return Response({'error': 'Invalid credentials'}, status=status.HTTP_400_BAD_REQUEST)
+
+class TodoViewSet(viewsets.ModelViewSet):
+    serializer_class = TodoSerializer
+    permission_classes = [permissions.IsAuthenticated]
+
+    def get_queryset(self):
+        print(f"user query: {self.request.user.username}")
+        logger.info(f"query by user: {self.request.user.username}")
+        return Todo.objects.filter(user=self.request.user)
+
+    def perform_create(self, serializer):
+        todo = serializer.save(user=self.request.user)
+        serializer.save(user=self.request.user)
+        print(f"New todo added - Title: '{todo.title}' by user: {self.request.user.username}")
+        logger.info(f"New todo added - Title: '{todo.title}' by user: {self.request.user.username}")
+