second

.env

@@ -0,0 +1,6 @@
+DB_NAME=todo_db
+DB_USER=postgres
+DB_PASSWORD=postgres
+DB_HOST=db
+DB_PORT=5432
+DEBUG=1

Dockerfile

@@ -0,0 +1,30 @@
+# backend/Dockerfile
+FROM python:3.9-slim
+
+# Set environment variables
+ENV PYTHONDONTWRITEBYTECODE 1
+ENV PYTHONUNBUFFERED 1
+
+# Set work directory
+WORKDIR /app
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    gcc \
+    postgresql-client \
+    netcat-openbsd \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Python dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy project
+COPY . .
+
+# Copy entrypoint script and set permissions
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh \
+    && sed -i 's/\r$//g' /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

entrypoint.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# Wait for postgres to be ready
+while ! nc -z db 5432; do
+  echo "Waiting for postgres..."
+  sleep 1
+done
+
+echo "PostgreSQL started"
+
+# Apply database migrations
+echo "Applying database migrations..."
+python manage.py migrate
+
+# Start server
+echo "Starting server..."
+python manage.py runserver 0.0.0.0:8000

manage.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+"""Django's command-line utility for administrative tasks."""
+import os
+import sys
+
+
+def main():
+    """Run administrative tasks."""
+    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'todo_project.settings')
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "Couldn't import Django. Are you sure it's installed and "
+            "available on your PYTHONPATH environment variable? Did you "
+            "forget to activate a virtual environment?"
+        ) from exc
+    execute_from_command_line(sys.argv)
+
+
+if __name__ == '__main__':
+    main()

requirements.txt

@@ -0,0 +1,7 @@
+Django==4.2.0
+djangorestframework==3.14.0
+django-cors-headers==4.1.0
+djangorestframework-simplejwt==5.2.2
+python-dotenv==1.0.0
+psycopg2-binary==2.9.9
+

todo_project/asgi.py

@@ -0,0 +1,16 @@
+"""
+ASGI config for todo_project project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/4.2/howto/deployment/asgi/
+"""
+
+import os
+
+from django.core.asgi import get_asgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'todo_project.settings')
+
+application = get_asgi_application()

todo_project/settings.py

@@ -0,0 +1,151 @@
+"""
+Django settings for todo_project project.
+
+Generated by 'django-admin startproject' using Django 4.2.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/4.2/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/4.2/ref/settings/
+"""
+
+from pathlib import Path
+import os
+from dotenv import load_dotenv
+
+# Load environment variables
+load_dotenv()
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/4.2/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = 'django-insecure-lfui+*aw(!!kq8qbalr@mp$--uc7gb2#8o#ps3p5s2)pzw@s3i'
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = []
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+    'rest_framework',
+    'corsheaders',
+    'todos',
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'corsheaders.middleware.CorsMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+CORS_ALLOWED_ORIGINS = [
+    "http://localhost:5173",  # Vue.js development server
+]
+
+REST_FRAMEWORK = {
+    'DEFAULT_AUTHENTICATION_CLASSES': [
+        'rest_framework_simplejwt.authentication.JWTAuthentication',
+    ],
+}
+
+ROOT_URLCONF = 'todo_project.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'todo_project.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/4.2/ref/settings/#databases
+
+#DATABASES = {
+#    'default': {
+#        'ENGINE': 'django.db.backends.sqlite3',
+#        'NAME': BASE_DIR / 'db.sqlite3',
+#    }
+#}
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.postgresql',
+        'NAME': os.getenv('DB_NAME', 'todo_db'),
+        'USER': os.getenv('DB_USER', 'postgres'),
+        'PASSWORD': os.getenv('DB_PASSWORD', 'postgres'),
+        'HOST': os.getenv('DB_HOST', 'localhost'),
+        'PORT': os.getenv('DB_PORT', '5432'),
+    }
+}
+
+# Password validation
+# https://docs.djangoproject.com/en/4.2/ref/settings/#auth-password-validators
+
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+    },
+]
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/4.2/topics/i18n/
+
+LANGUAGE_CODE = 'en-us'
+
+TIME_ZONE = 'UTC'
+
+USE_I18N = True
+
+USE_TZ = True
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/4.2/howto/static-files/
+
+STATIC_URL = 'static/'
+
+# Default primary key field type
+# https://docs.djangoproject.com/en/4.2/ref/settings/#default-auto-field
+
+DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

todo_project/urls.py

@@ -0,0 +1,24 @@
+"""
+URL configuration for todo_project project.
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/4.2/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  path('', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.urls import include, path
+    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
+"""
+
+from django.contrib import admin
+from django.urls import path, include
+
+urlpatterns = [
+    path('admin/', admin.site.urls),
+    path('api/', include('todos.urls')),
+]

todo_project/wsgi.py

@@ -0,0 +1,16 @@
+"""
+WSGI config for todo_project project.
+
+It exposes the WSGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/4.2/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'todo_project.settings')
+
+application = get_wsgi_application()

todos/admin.py

@@ -0,0 +1,3 @@
+from django.contrib import admin
+
+# Register your models here.

todos/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class TodosConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'todos'

todos/migrations/0001_initial.py

@@ -0,0 +1,27 @@
+# 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

@@ -0,0 +1,12 @@
+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

@@ -0,0 +1,21 @@
+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

@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.

todos/urls.py

@@ -0,0 +1,12 @@
+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

@@ -0,0 +1,51 @@
+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}")
+