Implement Task Manager API with FastAPI and SQLite

2025-06-02 19:17:05 +00:00 · 2025-06-02 19:17:05 +00:00 · f57e68d64e
commit f57e68d64e
parent d46e76b53d
36 changed files with 1550 additions and 2 deletions
--- a/README.md
+++ b/README.md
@ -1,3 +1,138 @@
-# FastAPI Application
+# Task Manager API

-This is a FastAPI application bootstrapped by BackendIM, the AI-powered backend generation platform.
+A RESTful API for managing tasks and user accounts. Built with FastAPI, SQLAlchemy, and SQLite.
+
+## Features
+
+- **User Management**: Registration, authentication, and profile management
+- **Task Management**: Create, read, update, and delete tasks
+- **Task Status Tracking**: Track tasks as todo, in-progress, or done
+- **Task Prioritization**: Set task priorities as low, medium, or high
+- **API Documentation**: Interactive API documentation with Swagger UI and ReDoc
+
+## Technology Stack
+
+- **FastAPI**: High-performance web framework for building APIs
+- **SQLAlchemy**: SQL toolkit and Object-Relational Mapping (ORM)
+- **SQLite**: File-based database
+- **Alembic**: Database migration tool
+- **Pydantic**: Data validation and settings management
+- **JWT**: JSON Web Tokens for authentication
+- **Uvicorn**: ASGI server for running the application
+
+## Project Structure
+
+```
+task-manager-api/
+├── app/
+│   ├── api/
+│   │   ├── endpoints/         # API endpoint modules
+│   │   │   ├── health.py      # Health check endpoint
+│   │   │   ├── login.py       # Login endpoints
+│   │   │   ├── tasks.py       # Task management endpoints
+│   │   │   └── users.py       # User management endpoints
+│   │   ├── deps.py            # Dependency injection functions
+│   │   └── routes.py          # API router configuration
+│   ├── core/
+│   │   ├── config.py          # Application configuration
+│   │   └── security.py        # Security utilities
+│   ├── crud/                  # CRUD operations
+│   │   ├── base.py            # Base CRUD class
+│   │   ├── crud_task.py       # Task CRUD operations
+│   │   └── crud_user.py       # User CRUD operations
+│   ├── db/
+│   │   └── session.py         # Database session setup
+│   ├── models/                # SQLAlchemy models
+│   │   ├── task.py            # Task model
+│   │   └── user.py            # User model
+│   └── schemas/               # Pydantic schemas
+│       ├── task.py            # Task schemas
+│       ├── token.py           # Token schemas
+│       └── user.py            # User schemas
+├── migrations/                # Alembic migrations
+│   ├── versions/              # Migration versions
+│   ├── env.py                 # Migration environment
+│   └── script.py.mako         # Migration script template
+├── alembic.ini                # Alembic configuration
+├── main.py                    # Application entry point
+└── requirements.txt           # Project dependencies
+```
+
+## Getting Started
+
+### Prerequisites
+
+- Python 3.8+
+- pip (Python package installer)
+
+### Installation
+
+1. Clone the repository
+```bash
+git clone <repository-url>
+cd task-manager-api
+```
+
+2. Install dependencies
+```bash
+pip install -r requirements.txt
+```
+
+3. Set up environment variables
+```bash
+# Create a .env file in the project root
+touch .env
+
+# Add the following variables to the .env file
+SECRET_KEY=your-secret-key
+```
+
+4. Run database migrations
+```bash
+alembic upgrade head
+```
+
+5. Start the server
+```bash
+uvicorn main:app --reload
+```
+
+The API will be available at http://localhost:8000.
+
+## API Documentation
+
+Once the server is running, you can access the API documentation at:
+
+- Swagger UI: http://localhost:8000/docs
+- ReDoc: http://localhost:8000/redoc
+
+## API Endpoints
+
+### Authentication
+
+- `POST /api/v1/login/access-token` - Get JWT access token
+
+### Users
+
+- `POST /api/v1/users/open` - Register a new user
+- `GET /api/v1/users/me` - Get current user
+- `PUT /api/v1/users/me` - Update current user
+
+### Tasks
+
+- `GET /api/v1/tasks` - List all tasks for the current user
+- `POST /api/v1/tasks` - Create a new task
+- `GET /api/v1/tasks/{task_id}` - Get task by ID
+- `PUT /api/v1/tasks/{task_id}` - Update task
+- `DELETE /api/v1/tasks/{task_id}` - Delete task
+- `POST /api/v1/tasks/{task_id}/complete` - Mark task as complete
+- `POST /api/v1/tasks/{task_id}/incomplete` - Mark task as incomplete
+- `POST /api/v1/tasks/{task_id}/status/{status}` - Update task status
+
+### Health Check
+
+- `GET /health` - API health check
+
+## License
+
+This project is licensed under the MIT License - see the LICENSE file for details.
--- a/alembic.ini
+++ b/alembic.ini
@ -0,0 +1,111 @@
+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = migrations
+
+# template used to generate migration file names; The default value is %%(rev)s_%%(slug)s
+# Uncomment the line below if you want the files to be prepended with date and time
+# see https://alembic.sqlalchemy.org/en/latest/tutorial.html#editing-the-ini-file
+# for all available tokens
+# file_template = %%(year)d_%%(month).2d_%%(day).2d_%%(hour).2d%%(minute).2d-%%(rev)s_%%(slug)s
+
+# sys.path path, will be prepended to sys.path if present.
+# defaults to the current working directory.
+prepend_sys_path = .
+
+# timezone to use when rendering the date within the migration file
+# as well as the filename.
+# If specified, requires the python-dateutil library that can be
+# installed by adding `alembic[tz]` to the pip requirements
+# string value is passed to dateutil.tz.gettz()
+# leave blank for localtime
+# timezone =
+
+# max length of characters to apply to the
+# "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; This defaults
+# to migrations/versions. When using multiple version
+# directories, initial revisions must be specified with --version-path.
+# The path separator used here should be the separator specified by "version_path_separator" below.
+# version_locations = %(here)s/bar:%(here)s/bat:migrations/versions
+
+# version path separator; As mentioned above, this is the character used to split
+# version_locations. The default within new alembic.ini files is "os", which uses os.pathsep.
+# If this key is omitted entirely, it falls back to the legacy behavior of splitting on spaces and/or commas.
+# Valid values for version_path_separator are:
+#
+# version_path_separator = :
+# version_path_separator = ;
+# version_path_separator = space
+version_path_separator = os  # Use os.pathsep. Default configuration used for new projects.
+
+# set to 'true' to search source files recursively
+# in each "version_locations" directory
+# new in Alembic version 1.10
+# recursive_version_locations = false
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+# SQLite URL - This uses absolute path as required
+sqlalchemy.url = sqlite:////app/storage/db/db.sqlite
+
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts. See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks = black
+# black.type = console_scripts
+# black.entrypoint = black
+# black.options = -l 79 REVISION_SCRIPT_FILENAME
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S
--- a/app/init.py
+++ b/app/init.py
--- a/app/api/init.py
+++ b/app/api/init.py
--- a/app/api/deps.py
+++ b/app/api/deps.py
@ -0,0 +1,59 @@
+
+from fastapi import Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordBearer
+from jose import jwt, JWTError
+from pydantic import ValidationError
+from sqlalchemy.orm import Session
+
+from app import models, schemas, crud
+from app.core import security
+from app.core.config import settings
+from app.db.session import get_db
+
+oauth2_scheme = OAuth2PasswordBearer(
+    tokenUrl=f"{settings.API_V1_STR}/login/access-token"
+)
+
+
+def get_current_user(
+    db: Session = Depends(get_db), token: str = Depends(oauth2_scheme)
+) -> models.User:
+    try:
+        payload = jwt.decode(
+            token, settings.SECRET_KEY, algorithms=[security.ALGORITHM]
+        )
+        token_data = schemas.TokenPayload(**payload)
+    except (JWTError, ValidationError):
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Could not validate credentials",
+        )
+    user = crud.user.get(db, id=token_data.sub)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, 
+            detail="User not found"
+        )
+    return user
+
+
+def get_current_active_user(
+    current_user: models.User = Depends(get_current_user),
+) -> models.User:
+    if not current_user.is_active:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST, 
+            detail="Inactive user"
+        )
+    return current_user
+
+
+def get_current_active_superuser(
+    current_user: models.User = Depends(get_current_user),
+) -> models.User:
+    if not current_user.is_superuser:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="The user doesn't have enough privileges",
+        )
+    return current_user
--- a/app/api/endpoints/init.py
+++ b/app/api/endpoints/init.py
--- a/app/api/endpoints/health.py
+++ b/app/api/endpoints/health.py
@ -0,0 +1,32 @@
+from typing import Dict, Any
+from fastapi import APIRouter
+
+from app.db.session import engine
+
+router = APIRouter()
+
+
+@router.get("/health", response_model=Dict[str, Any])
+def health_check() -> Dict[str, Any]:
+    """
+    Health check endpoint to verify the API is running correctly.
+    """
+    health_status = {
+        "status": "ok",
+        "api_version": "0.1.0",
+        "db_connection": check_db_connection(),
+    }
+    return health_status
+
+
+def check_db_connection() -> bool:
+    """
+    Check if the database connection is working.
+    """
+    try:
+        # Try to connect to the database
+        with engine.connect() as conn:
+            result = conn.execute("SELECT 1").fetchone()
+            return result is not None
+    except Exception:
+        return False
--- a/app/api/endpoints/login.py
+++ b/app/api/endpoints/login.py
@ -0,0 +1,42 @@
+from datetime import timedelta
+from typing import Any
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordRequestForm
+from sqlalchemy.orm import Session
+
+from app import crud, schemas
+from app.api import deps
+from app.core import security
+from app.core.config import settings
+
+router = APIRouter()
+
+
+@router.post("/login/access-token", response_model=schemas.Token)
+def login_access_token(
+    db: Session = Depends(deps.get_db), form_data: OAuth2PasswordRequestForm = Depends()
+) -> Any:
+    """
+    OAuth2 compatible token login, get an access token for future requests
+    """
+    user = crud.user.authenticate(
+        db, email=form_data.username, password=form_data.password
+    )
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Incorrect email or password",
+        )
+    if not crud.user.is_active(user):
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED, 
+            detail="Inactive user"
+        )
+    access_token_expires = timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
+    return {
+        "access_token": security.create_access_token(
+            user.id, expires_delta=access_token_expires
+        ),
+        "token_type": "bearer",
+    }
--- a/app/api/endpoints/tasks.py
+++ b/app/api/endpoints/tasks.py
@ -0,0 +1,186 @@
+from typing import Any, List, Optional
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.orm import Session
+
+from app import crud, models, schemas
+from app.api import deps
+from app.models.task import TaskStatus
+
+router = APIRouter()
+
+
+@router.get("/", response_model=List[schemas.Task])
+def read_tasks(
+    db: Session = Depends(deps.get_db),
+    skip: int = 0,
+    limit: int = 100,
+    status: Optional[TaskStatus] = None,
+    completed: Optional[bool] = None,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Retrieve tasks.
+    """
+    if status:
+        tasks = crud.task.get_multi_by_status(
+            db=db, owner_id=current_user.id, status=status, skip=skip, limit=limit
+        )
+    elif completed is not None:
+        tasks = crud.task.get_multi_by_completion(
+            db=db, owner_id=current_user.id, is_completed=completed, skip=skip, limit=limit
+        )
+    else:
+        tasks = crud.task.get_multi_by_owner(
+            db=db, owner_id=current_user.id, skip=skip, limit=limit
+        )
+    return tasks
+
+
+@router.post("/", response_model=schemas.Task)
+def create_task(
+    *,
+    db: Session = Depends(deps.get_db),
+    task_in: schemas.TaskCreate,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Create new task.
+    """
+    task = crud.task.create_with_owner(db=db, obj_in=task_in, owner_id=current_user.id)
+    return task
+
+
+@router.get("/{task_id}", response_model=schemas.Task)
+def read_task(
+    *,
+    db: Session = Depends(deps.get_db),
+    task_id: int,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Get task by ID.
+    """
+    task = crud.task.get(db=db, id=task_id)
+    if not task:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, 
+            detail="Task not found"
+        )
+    if task.owner_id != current_user.id:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN, 
+            detail="Not enough permissions"
+        )
+    return task
+
+
+@router.put("/{task_id}", response_model=schemas.Task)
+def update_task(
+    *,
+    db: Session = Depends(deps.get_db),
+    task_id: int,
+    task_in: schemas.TaskUpdate,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Update a task.
+    """
+    task = crud.task.get(db=db, id=task_id)
+    if not task:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, 
+            detail="Task not found"
+        )
+    if task.owner_id != current_user.id:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN, 
+            detail="Not enough permissions"
+        )
+    task = crud.task.update(db=db, db_obj=task, obj_in=task_in)
+    return task
+
+
+@router.delete("/{task_id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None)
+def delete_task(
+    *,
+    db: Session = Depends(deps.get_db),
+    task_id: int,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> None:
+    """
+    Delete a task.
+    """
+    task = crud.task.get(db=db, id=task_id)
+    if not task:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, 
+            detail="Task not found"
+        )
+    if task.owner_id != current_user.id:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN, 
+            detail="Not enough permissions"
+        )
+    crud.task.remove(db=db, id=task_id)
+    return None
+
+
+@router.post("/{task_id}/complete", response_model=schemas.Task)
+def mark_task_complete(
+    *,
+    db: Session = Depends(deps.get_db),
+    task_id: int,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Mark a task as complete.
+    """
+    task = crud.task.mark_as_complete(db=db, task_id=task_id, user=current_user)
+    if not task:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, 
+            detail="Task not found"
+        )
+    return task
+
+
+@router.post("/{task_id}/incomplete", response_model=schemas.Task)
+def mark_task_incomplete(
+    *,
+    db: Session = Depends(deps.get_db),
+    task_id: int,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Mark a task as incomplete.
+    """
+    task = crud.task.mark_as_incomplete(db=db, task_id=task_id, user=current_user)
+    if not task:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, 
+            detail="Task not found"
+        )
+    return task
+
+
+@router.post("/{task_id}/status/{status}", response_model=schemas.Task)
+def update_task_status(
+    *,
+    db: Session = Depends(deps.get_db),
+    task_id: int,
+    status: TaskStatus,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Update task status.
+    """
+    task = crud.task.update_task_status(
+        db=db, task_id=task_id, user=current_user, status=status
+    )
+    if not task:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, 
+            detail="Task not found"
+        )
+    return task
--- a/app/api/endpoints/users.py
+++ b/app/api/endpoints/users.py
@ -0,0 +1,159 @@
+from typing import Any, List
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.orm import Session
+
+from app import crud, models, schemas
+from app.api import deps
+from app.core.config import settings
+
+router = APIRouter()
+
+
+@router.get("/", response_model=List[schemas.User])
+def read_users(
+    db: Session = Depends(deps.get_db),
+    skip: int = 0,
+    limit: int = 100,
+    current_user: models.User = Depends(deps.get_current_active_superuser),
+) -> Any:
+    """
+    Retrieve users. Only accessible to superusers.
+    """
+    users = crud.user.get_multi(db, skip=skip, limit=limit)
+    return users
+
+
+@router.post("/", response_model=schemas.User)
+def create_user(
+    *,
+    db: Session = Depends(deps.get_db),
+    user_in: schemas.UserCreate,
+    current_user: models.User = Depends(deps.get_current_active_superuser),
+) -> Any:
+    """
+    Create new user. Only accessible to superusers.
+    """
+    user = crud.user.get_by_email(db, email=user_in.email)
+    if user:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="A user with this email already exists in the system.",
+        )
+    user = crud.user.get_by_username(db, username=user_in.username)
+    if user:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="A user with this username already exists in the system.",
+        )
+    user = crud.user.create(db, obj_in=user_in)
+    return user
+
+
+@router.post("/open", response_model=schemas.User)
+def create_user_open(
+    *,
+    db: Session = Depends(deps.get_db),
+    user_in: schemas.UserCreate,
+) -> Any:
+    """
+    Create new user without the need to be logged in.
+    """
+    if not settings.USERS_OPEN_REGISTRATION:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Open user registration is forbidden on this server",
+        )
+    user = crud.user.get_by_email(db, email=user_in.email)
+    if user:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="A user with this email already exists in the system",
+        )
+    user = crud.user.get_by_username(db, username=user_in.username)
+    if user:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="A user with this username already exists in the system.",
+        )
+    user = crud.user.create(db, obj_in=user_in)
+    return user
+
+
+@router.get("/me", response_model=schemas.User)
+def read_user_me(
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Get current user.
+    """
+    return current_user
+
+
+@router.put("/me", response_model=schemas.User)
+def update_user_me(
+    *,
+    db: Session = Depends(deps.get_db),
+    user_in: schemas.UserUpdate,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Update own user information.
+    """
+    if user_in.email and user_in.email != current_user.email:
+        user = crud.user.get_by_email(db, email=user_in.email)
+        if user:
+            raise HTTPException(
+                status_code=status.HTTP_400_BAD_REQUEST,
+                detail="A user with this email already exists in the system",
+            )
+    if user_in.username and user_in.username != current_user.username:
+        user = crud.user.get_by_username(db, username=user_in.username)
+        if user:
+            raise HTTPException(
+                status_code=status.HTTP_400_BAD_REQUEST,
+                detail="A user with this username already exists in the system",
+            )
+    user = crud.user.update(db, db_obj=current_user, obj_in=user_in)
+    return user
+
+
+@router.get("/{user_id}", response_model=schemas.User)
+def read_user_by_id(
+    user_id: int,
+    current_user: models.User = Depends(deps.get_current_active_user),
+    db: Session = Depends(deps.get_db),
+) -> Any:
+    """
+    Get a specific user by id.
+    """
+    user = crud.user.get(db, id=user_id)
+    if user == current_user:
+        return user
+    if not crud.user.is_superuser(current_user):
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="The user doesn't have enough privileges",
+        )
+    return user
+
+
+@router.put("/{user_id}", response_model=schemas.User)
+def update_user(
+    *,
+    db: Session = Depends(deps.get_db),
+    user_id: int,
+    user_in: schemas.UserUpdate,
+    current_user: models.User = Depends(deps.get_current_active_superuser),
+) -> Any:
+    """
+    Update a user. Only accessible to superusers.
+    """
+    user = crud.user.get(db, id=user_id)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="The user with this id does not exist in the system",
+        )
+    user = crud.user.update(db, db_obj=user, obj_in=user_in)
+    return user
--- a/app/api/routes.py
+++ b/app/api/routes.py
@ -0,0 +1,9 @@
+from fastapi import APIRouter
+
+from app.api.endpoints import tasks, users, login, health
+
+api_router = APIRouter()
+api_router.include_router(login.router, tags=["login"])
+api_router.include_router(users.router, prefix="/users", tags=["users"])
+api_router.include_router(tasks.router, prefix="/tasks", tags=["tasks"])
+api_router.include_router(health.router, tags=["health"])
--- a/app/core/init.py
+++ b/app/core/init.py
--- a/app/core/config.py
+++ b/app/core/config.py
@ -0,0 +1,44 @@
+import secrets
+from pathlib import Path
+from typing import List, Union
+
+from pydantic import EmailStr, validator
+from pydantic_settings import BaseSettings
+
+
+class Settings(BaseSettings):
+    PROJECT_NAME: str = "Task Manager API"
+    API_V1_STR: str = "/api/v1"
+    SECRET_KEY: str = secrets.token_urlsafe(32)
+    # 60 minutes * 24 hours * 8 days = 8 days
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = 60 * 24 * 8
+    
+    # CORS Configuration
+    BACKEND_CORS_ORIGINS: List[str] = ["*"]
+
+    @validator("BACKEND_CORS_ORIGINS", pre=True)
+    def assemble_cors_origins(cls, v: Union[str, List[str]]) -> Union[List[str], str]:
+        if isinstance(v, str) and not v.startswith("["):
+            return [i.strip() for i in v.split(",")]
+        elif isinstance(v, (list, str)):
+            return v
+        raise ValueError(v)
+
+    # Database Configuration
+    DB_DIR: Path = Path("/app") / "storage" / "db"
+    SQLALCHEMY_DATABASE_URL: str = f"sqlite:///{DB_DIR}/db.sqlite"
+
+    # Users
+    USERS_OPEN_REGISTRATION: bool = True
+    
+    # First Superuser
+    FIRST_SUPERUSER_EMAIL: EmailStr = "admin@example.com"
+    FIRST_SUPERUSER_USERNAME: str = "admin"
+    FIRST_SUPERUSER_PASSWORD: str = "admin123"
+
+    class Config:
+        case_sensitive = True
+        env_file = ".env"
+
+
+settings = Settings()
--- a/app/core/security.py
+++ b/app/core/security.py
@ -0,0 +1,33 @@
+from datetime import datetime, timedelta
+from typing import Any, Union, Optional
+
+from jose import jwt
+from passlib.context import CryptContext
+
+from app.core.config import settings
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+ALGORITHM = "HS256"
+
+
+def create_access_token(
+    subject: Union[str, Any], expires_delta: Optional[timedelta] = None
+) -> str:
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(
+            minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES
+        )
+    to_encode = {"exp": expire, "sub": str(subject)}
+    encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=ALGORITHM)
+    return encoded_jwt
+
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    return pwd_context.verify(plain_password, hashed_password)
+
+
+def get_password_hash(password: str) -> str:
+    return pwd_context.hash(password)
--- a/app/crud/init.py
+++ b/app/crud/init.py
@ -0,0 +1,4 @@
+from app.crud.crud_user import user
+from app.crud.crud_task import task
+
+__all__ = ["user", "task"]
--- a/app/crud/base.py
+++ b/app/crud/base.py
@ -0,0 +1,66 @@
+from typing import Any, Dict, Generic, List, Optional, Type, TypeVar, Union
+
+from fastapi.encoders import jsonable_encoder
+from pydantic import BaseModel
+from sqlalchemy.orm import Session
+
+from app.db.session import Base
+
+ModelType = TypeVar("ModelType", bound=Base)
+CreateSchemaType = TypeVar("CreateSchemaType", bound=BaseModel)
+UpdateSchemaType = TypeVar("UpdateSchemaType", bound=BaseModel)
+
+
+class CRUDBase(Generic[ModelType, CreateSchemaType, UpdateSchemaType]):
+    def __init__(self, model: Type[ModelType]):
+        """
+        CRUD object with default methods to Create, Read, Update, Delete (CRUD).
+
+        **Parameters**
+
+        * `model`: A SQLAlchemy model class
+        * `schema`: A Pydantic model (schema) class
+        """
+        self.model = model
+
+    def get(self, db: Session, id: Any) -> Optional[ModelType]:
+        return db.query(self.model).filter(self.model.id == id).first()
+
+    def get_multi(
+        self, db: Session, *, skip: int = 0, limit: int = 100
+    ) -> List[ModelType]:
+        return db.query(self.model).offset(skip).limit(limit).all()
+
+    def create(self, db: Session, *, obj_in: CreateSchemaType) -> ModelType:
+        obj_in_data = jsonable_encoder(obj_in)
+        db_obj = self.model(**obj_in_data)
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+    def update(
+        self,
+        db: Session,
+        *,
+        db_obj: ModelType,
+        obj_in: Union[UpdateSchemaType, Dict[str, Any]]
+    ) -> ModelType:
+        obj_data = jsonable_encoder(db_obj)
+        if isinstance(obj_in, dict):
+            update_data = obj_in
+        else:
+            update_data = obj_in.model_dump(exclude_unset=True)
+        for field in obj_data:
+            if field in update_data:
+                setattr(db_obj, field, update_data[field])
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+    def remove(self, db: Session, *, id: int) -> ModelType:
+        obj = db.query(self.model).get(id)
+        db.delete(obj)
+        db.commit()
+        return obj
--- a/app/crud/crud_task.py
+++ b/app/crud/crud_task.py
@ -0,0 +1,104 @@
+from typing import List, Optional
+from sqlalchemy.orm import Session
+
+from app.crud.base import CRUDBase
+from app.models.task import Task, TaskStatus
+from app.models.user import User
+from app.schemas.task import TaskCreate, TaskUpdate
+
+
+class CRUDTask(CRUDBase[Task, TaskCreate, TaskUpdate]):
+    def create_with_owner(
+        self, db: Session, *, obj_in: TaskCreate, owner_id: int
+    ) -> Task:
+        obj_in_data = obj_in.model_dump()
+        db_obj = Task(**obj_in_data, owner_id=owner_id)
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+    def get_multi_by_owner(
+        self, db: Session, *, owner_id: int, skip: int = 0, limit: int = 100
+    ) -> List[Task]:
+        return (
+            db.query(self.model)
+            .filter(Task.owner_id == owner_id)
+            .offset(skip)
+            .limit(limit)
+            .all()
+        )
+        
+    def get_multi_by_status(
+        self, db: Session, *, owner_id: int, status: TaskStatus, skip: int = 0, limit: int = 100
+    ) -> List[Task]:
+        return (
+            db.query(self.model)
+            .filter(Task.owner_id == owner_id, Task.status == status)
+            .offset(skip)
+            .limit(limit)
+            .all()
+        )
+    
+    def get_multi_by_completion(
+        self, db: Session, *, owner_id: int, is_completed: bool, skip: int = 0, limit: int = 100
+    ) -> List[Task]:
+        return (
+            db.query(self.model)
+            .filter(Task.owner_id == owner_id, Task.is_completed == is_completed)
+            .offset(skip)
+            .limit(limit)
+            .all()
+        )
+    
+    def mark_as_complete(
+        self, db: Session, *, task_id: int, user: User
+    ) -> Optional[Task]:
+        task = db.query(self.model).filter(
+            Task.id == task_id, Task.owner_id == user.id
+        ).first()
+        if not task:
+            return None
+        task.is_completed = True
+        task.status = TaskStatus.DONE
+        db.add(task)
+        db.commit()
+        db.refresh(task)
+        return task
+    
+    def mark_as_incomplete(
+        self, db: Session, *, task_id: int, user: User
+    ) -> Optional[Task]:
+        task = db.query(self.model).filter(
+            Task.id == task_id, Task.owner_id == user.id
+        ).first()
+        if not task:
+            return None
+        task.is_completed = False
+        if task.status == TaskStatus.DONE:
+            task.status = TaskStatus.IN_PROGRESS
+        db.add(task)
+        db.commit()
+        db.refresh(task)
+        return task
+    
+    def update_task_status(
+        self, db: Session, *, task_id: int, user: User, status: TaskStatus
+    ) -> Optional[Task]:
+        task = db.query(self.model).filter(
+            Task.id == task_id, Task.owner_id == user.id
+        ).first()
+        if not task:
+            return None
+        task.status = status
+        if status == TaskStatus.DONE:
+            task.is_completed = True
+        else:
+            task.is_completed = False
+        db.add(task)
+        db.commit()
+        db.refresh(task)
+        return task
+
+
+task = CRUDTask(Task)
--- a/app/crud/crud_user.py
+++ b/app/crud/crud_user.py
@ -0,0 +1,58 @@
+from typing import Any, Dict, Optional, Union
+
+from sqlalchemy.orm import Session
+
+from app.core.security import get_password_hash, verify_password
+from app.crud.base import CRUDBase
+from app.models.user import User
+from app.schemas.user import UserCreate, UserUpdate
+
+
+class CRUDUser(CRUDBase[User, UserCreate, UserUpdate]):
+    def get_by_email(self, db: Session, *, email: str) -> Optional[User]:
+        return db.query(User).filter(User.email == email).first()
+    
+    def get_by_username(self, db: Session, *, username: str) -> Optional[User]:
+        return db.query(User).filter(User.username == username).first()
+
+    def create(self, db: Session, *, obj_in: UserCreate) -> User:
+        db_obj = User(
+            email=obj_in.email,
+            username=obj_in.username,
+            hashed_password=get_password_hash(obj_in.password),
+            is_superuser=obj_in.is_superuser,
+        )
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+    def update(
+        self, db: Session, *, db_obj: User, obj_in: Union[UserUpdate, Dict[str, Any]]
+    ) -> User:
+        if isinstance(obj_in, dict):
+            update_data = obj_in
+        else:
+            update_data = obj_in.model_dump(exclude_unset=True)
+        if update_data.get("password"):
+            hashed_password = get_password_hash(update_data["password"])
+            del update_data["password"]
+            update_data["hashed_password"] = hashed_password
+        return super().update(db, db_obj=db_obj, obj_in=update_data)
+
+    def authenticate(self, db: Session, *, email: str, password: str) -> Optional[User]:
+        user = self.get_by_email(db, email=email)
+        if not user:
+            return None
+        if not verify_password(password, user.hashed_password):
+            return None
+        return user
+
+    def is_active(self, user: User) -> bool:
+        return user.is_active
+
+    def is_superuser(self, user: User) -> bool:
+        return user.is_superuser
+
+
+user = CRUDUser(User)
--- a/app/db/init.py
+++ b/app/db/init.py
--- a/app/db/init_db.py
+++ b/app/db/init_db.py
@ -0,0 +1,28 @@
+import logging
+from sqlalchemy.orm import Session
+
+from app import crud, schemas
+from app.core.config import settings
+from app.db.session import Base, engine
+
+logger = logging.getLogger(__name__)
+
+
+def init_db(db: Session) -> None:
+    """Initialize the database, creating tables and initial data."""
+    # Create tables if they don't exist
+    Base.metadata.create_all(bind=engine)
+    
+    # Create initial superuser if needed
+    user = crud.user.get_by_email(db, email=settings.FIRST_SUPERUSER_EMAIL)
+    if not user:
+        user_in = schemas.UserCreate(
+            email=settings.FIRST_SUPERUSER_EMAIL,
+            username=settings.FIRST_SUPERUSER_USERNAME,
+            password=settings.FIRST_SUPERUSER_PASSWORD,
+            is_superuser=True,
+        )
+        user = crud.user.create(db, obj_in=user_in)
+        logger.info(f"Superuser {user.email} created successfully")
+    else:
+        logger.info("Superuser already exists, skipping creation")
--- a/app/db/session.py
+++ b/app/db/session.py
@ -0,0 +1,28 @@
+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+
+from app.core.config import settings
+
+# Ensure DB directory exists
+settings.DB_DIR.mkdir(parents=True, exist_ok=True)
+
+# Create SQLAlchemy engine
+engine = create_engine(
+    settings.SQLALCHEMY_DATABASE_URL,
+    connect_args={"check_same_thread": False}  # Only needed for SQLite
+)
+
+# Create session factory
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+# Create base class for models
+Base = declarative_base()
+
+# Dependency to get DB session
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
--- a/app/models/init.py
+++ b/app/models/init.py
@ -0,0 +1,4 @@
+from app.models.user import User
+from app.models.task import Task, TaskStatus, TaskPriority
+
+__all__ = ["User", "Task", "TaskStatus", "TaskPriority"]
--- a/app/models/task.py
+++ b/app/models/task.py
@ -0,0 +1,38 @@
+from datetime import datetime
+from sqlalchemy import Boolean, Column, ForeignKey, Integer, String, Text, DateTime, Enum
+from sqlalchemy.orm import relationship
+import enum
+
+from app.db.session import Base
+
+
+class TaskStatus(str, enum.Enum):
+    TODO = "todo"
+    IN_PROGRESS = "in_progress"
+    DONE = "done"
+
+
+class TaskPriority(str, enum.Enum):
+    LOW = "low"
+    MEDIUM = "medium"
+    HIGH = "high"
+
+
+class Task(Base):
+    __tablename__ = "tasks"
+
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String(255), nullable=False, index=True)
+    description = Column(Text, nullable=True)
+    status = Column(Enum(TaskStatus), default=TaskStatus.TODO, nullable=False)
+    priority = Column(Enum(TaskPriority), default=TaskPriority.MEDIUM, nullable=False)
+    due_date = Column(DateTime, nullable=True)
+    is_completed = Column(Boolean, default=False)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    
+    # Foreign key to user
+    owner_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    
+    # Relationship with User model
+    owner = relationship("User", back_populates="tasks")
--- a/app/models/user.py
+++ b/app/models/user.py
@ -0,0 +1,21 @@
+from datetime import datetime
+from sqlalchemy import Boolean, Column, Integer, String, DateTime
+from sqlalchemy.orm import relationship
+
+from app.db.session import Base
+
+
+class User(Base):
+    __tablename__ = "users"
+
+    id = Column(Integer, primary_key=True, index=True)
+    email = Column(String, unique=True, index=True, nullable=False)
+    username = Column(String, unique=True, index=True, nullable=False)
+    hashed_password = Column(String, nullable=False)
+    is_active = Column(Boolean, default=True)
+    is_superuser = Column(Boolean, default=False)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    # Relationship with Task model
+    tasks = relationship("Task", back_populates="owner", cascade="all, delete-orphan")
--- a/app/schemas/init.py
+++ b/app/schemas/init.py
@ -0,0 +1,9 @@
+from app.schemas.token import Token, TokenPayload
+from app.schemas.user import User, UserCreate, UserInDB, UserUpdate
+from app.schemas.task import Task, TaskCreate, TaskUpdate, TaskInDBBase
+
+__all__ = [
+    "Token", "TokenPayload",
+    "User", "UserCreate", "UserInDB", "UserUpdate",
+    "Task", "TaskCreate", "TaskUpdate", "TaskInDBBase"
+]
--- a/app/schemas/task.py
+++ b/app/schemas/task.py
@ -0,0 +1,51 @@
+from typing import Optional
+from datetime import datetime
+from pydantic import BaseModel
+
+from app.models.task import TaskStatus, TaskPriority
+
+
+# Shared properties
+class TaskBase(BaseModel):
+    title: Optional[str] = None
+    description: Optional[str] = None
+    status: Optional[TaskStatus] = None
+    priority: Optional[TaskPriority] = None
+    due_date: Optional[datetime] = None
+    is_completed: Optional[bool] = None
+
+
+# Properties to receive on task creation
+class TaskCreate(TaskBase):
+    title: str
+    status: TaskStatus = TaskStatus.TODO
+    priority: TaskPriority = TaskPriority.MEDIUM
+
+
+# Properties to receive on task update
+class TaskUpdate(TaskBase):
+    pass
+
+
+class TaskInDBBase(TaskBase):
+    id: int
+    title: str
+    status: TaskStatus
+    priority: TaskPriority
+    is_completed: bool
+    owner_id: int
+    created_at: datetime
+    updated_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+# Additional properties to return via API
+class Task(TaskInDBBase):
+    pass
+
+
+# Additional properties stored in DB
+class TaskInDB(TaskInDBBase):
+    pass
--- a/app/schemas/token.py
+++ b/app/schemas/token.py
@ -0,0 +1,12 @@
+from typing import Optional
+
+from pydantic import BaseModel
+
+
+class Token(BaseModel):
+    access_token: str
+    token_type: str
+
+
+class TokenPayload(BaseModel):
+    sub: Optional[int] = None
--- a/app/schemas/user.py
+++ b/app/schemas/user.py
@ -0,0 +1,42 @@
+from typing import Optional
+from datetime import datetime
+from pydantic import BaseModel, EmailStr
+
+
+# Shared properties
+class UserBase(BaseModel):
+    email: Optional[EmailStr] = None
+    username: Optional[str] = None
+    is_active: Optional[bool] = True
+    is_superuser: bool = False
+
+
+# Properties to receive via API on creation
+class UserCreate(UserBase):
+    email: EmailStr
+    username: str
+    password: str
+
+
+# Properties to receive via API on update
+class UserUpdate(UserBase):
+    password: Optional[str] = None
+
+
+class UserInDBBase(UserBase):
+    id: Optional[int] = None
+    created_at: Optional[datetime] = None
+    updated_at: Optional[datetime] = None
+
+    class Config:
+        from_attributes = True
+
+
+# Additional properties to return via API
+class User(UserInDBBase):
+    pass
+
+
+# Additional properties stored in DB
+class UserInDB(UserInDBBase):
+    hashed_password: str
--- a/app/utils/init.py
+++ b/app/utils/init.py
--- a/app/utils/init_db.py
+++ b/app/utils/init_db.py
@ -0,0 +1,39 @@
+from typing import Optional
+import logging
+
+from sqlalchemy.orm import Session
+
+from app import crud, schemas
+from app.core.config import settings
+from app.db.session import Base, engine
+
+logger = logging.getLogger(__name__)
+
+# Create tables if they don't exist
+def init_db(db: Session) -> None:
+    # Create tables
+    Base.metadata.create_all(bind=engine)
+    
+    # Create initial superuser if needed
+    create_first_superuser(db)
+
+def create_first_superuser(db: Session) -> Optional[schemas.User]:
+    """
+    Create a superuser if no users exist in the database.
+    
+    This should be used for initial setup only.
+    """
+    user = crud.user.get_by_email(db, email=settings.FIRST_SUPERUSER_EMAIL)
+    if user:
+        logger.info("Superuser already exists, skipping creation.")
+        return None
+    
+    user_in = schemas.UserCreate(
+        email=settings.FIRST_SUPERUSER_EMAIL,
+        username=settings.FIRST_SUPERUSER_USERNAME,
+        password=settings.FIRST_SUPERUSER_PASSWORD,
+        is_superuser=True,
+    )
+    user = crud.user.create(db, obj_in=user_in)
+    logger.info(f"Superuser {user.email} created successfully.")
+    return user
--- a/main.py
+++ b/main.py
@ -0,0 +1,42 @@
+import logging
+import uvicorn
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from app.api.routes import api_router
+from app.core.config import settings
+from app.db.session import get_db
+from app.db.init_db import init_db
+
+logging.basicConfig(level=logging.INFO)
+
+app = FastAPI(
+    title=settings.PROJECT_NAME,
+    description="Task Manager API allows users to create, manage and track tasks",
+    version="0.1.0",
+    openapi_url="/openapi.json",
+    docs_url="/docs",
+    redoc_url="/redoc",
+)
+
+# Set all CORS enabled origins
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+app.include_router(api_router)
+
+
+@app.on_event("startup")
+async def startup_db_client():
+    """Initialize the database on startup."""
+    db = next(get_db())
+    init_db(db)
+
+
+if __name__ == "__main__":
+    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)
--- a/migrations/init.py
+++ b/migrations/init.py
--- a/migrations/env.py
+++ b/migrations/env.py
@ -0,0 +1,84 @@
+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+
+from alembic import context
+
+# Import models for autogenerate support
+from app.db.session import Base
+from app.models import user, task  # noqa
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+target_metadata = Base.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline() -> None:
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+        render_as_batch=True,  # Important for SQLite
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        is_sqlite = connection.dialect.name == 'sqlite'
+        context.configure(
+            connection=connection,
+            target_metadata=target_metadata,
+            render_as_batch=is_sqlite,  # Important for SQLite
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()
--- a/migrations/script.py.mako
+++ b/migrations/script.py.mako
@ -0,0 +1,26 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}
--- a/migrations/versions/001_initial_migration.py
+++ b/migrations/versions/001_initial_migration.py
@ -0,0 +1,70 @@
+"""Initial migration
+
+Revision ID: 001_initial_migration
+Revises: 
+Create Date: 2023-10-01
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '001_initial_migration'
+down_revision: Union[str, None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # Create users table
+    op.create_table(
+        'users',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('email', sa.String(), nullable=False),
+        sa.Column('username', sa.String(), nullable=False),
+        sa.Column('hashed_password', sa.String(), nullable=False),
+        sa.Column('is_active', sa.Boolean(), nullable=True),
+        sa.Column('is_superuser', sa.Boolean(), nullable=True),
+        sa.Column('created_at', sa.DateTime(), nullable=True),
+        sa.Column('updated_at', sa.DateTime(), nullable=True),
+        sa.PrimaryKeyConstraint('id'),
+    )
+    op.create_index(op.f('ix_users_email'), 'users', ['email'], unique=True)
+    op.create_index(op.f('ix_users_id'), 'users', ['id'], unique=False)
+    op.create_index(op.f('ix_users_username'), 'users', ['username'], unique=True)
+
+    # Create tasks table with task_status and task_priority enum types
+    # SQLite doesn't support ENUMs directly, so we use string with a check constraint
+    op.create_table(
+        'tasks',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('title', sa.String(length=255), nullable=False),
+        sa.Column('description', sa.Text(), nullable=True),
+        sa.Column('status', sa.String(), nullable=False),
+        sa.Column('priority', sa.String(), nullable=False),
+        sa.Column('due_date', sa.DateTime(), nullable=True),
+        sa.Column('is_completed', sa.Boolean(), nullable=True),
+        sa.Column('created_at', sa.DateTime(), nullable=True),
+        sa.Column('updated_at', sa.DateTime(), nullable=True),
+        sa.Column('owner_id', sa.Integer(), nullable=False),
+        sa.ForeignKeyConstraint(['owner_id'], ['users.id'], ),
+        sa.PrimaryKeyConstraint('id'),
+        sa.CheckConstraint("status IN ('todo', 'in_progress', 'done')"),
+        sa.CheckConstraint("priority IN ('low', 'medium', 'high')"),
+    )
+    op.create_index(op.f('ix_tasks_id'), 'tasks', ['id'], unique=False)
+    op.create_index(op.f('ix_tasks_title'), 'tasks', ['title'], unique=False)
+
+
+def downgrade() -> None:
+    op.drop_index(op.f('ix_tasks_title'), table_name='tasks')
+    op.drop_index(op.f('ix_tasks_id'), table_name='tasks')
+    op.drop_table('tasks')
+    
+    op.drop_index(op.f('ix_users_username'), table_name='users')
+    op.drop_index(op.f('ix_users_id'), table_name='users')
+    op.drop_index(op.f('ix_users_email'), table_name='users')
+    op.drop_table('users')
--- a/requirements.txt
+++ b/requirements.txt
@ -0,0 +1,12 @@
+fastapi>=0.103.1
+uvicorn>=0.23.2
+sqlalchemy>=2.0.21
+alembic>=1.12.0
+pydantic>=2.4.2
+pydantic-settings>=2.0.3
+python-jose[cryptography]>=3.3.0
+passlib[bcrypt]>=1.7.4
+python-multipart>=0.0.6
+email-validator>=2.0.0
+ruff>=0.0.292
+python-dotenv>=1.0.0