Implement Task Manager API with FastAPI and SQLite

- Set up project structure and dependencies
- Create database models for tasks and users with SQLAlchemy
- Configure Alembic for database migrations
- Implement authentication system with JWT tokens
- Create CRUD API endpoints for tasks and users
- Add health check endpoint
- Update README with documentation

README.md

@@ -1,3 +1,132 @@
-# 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 users built with FastAPI and SQLite.
+
+## Features
+
+- User authentication with JWT tokens
+- User registration and management
+- Task management with CRUD operations
+- Task filtering and pagination
+- Health check endpoint
+- OpenAPI documentation
+
+## Tech Stack
+
+- **FastAPI**: Modern, fast web framework for building APIs
+- **SQLAlchemy**: SQL toolkit and ORM
+- **Alembic**: Database migration tool
+- **SQLite**: Lightweight, file-based database
+- **Pydantic**: Data validation and settings management
+- **JWT**: JSON Web Tokens for authentication
+- **Uvicorn**: ASGI server for running the application
+
+## Project Structure
+
+```
+taskmanagerapi/
+│
+├── app/                    # Application package
+│   ├── api/                # API endpoints
+│   │   └── v1/             # API version 1
+│   │       ├── endpoints/  # API endpoint modules
+│   │       └── api.py      # API router
+│   │
+│   ├── core/               # Core modules
+│   │   ├── config/         # Configuration
+│   │   └── security/       # Security utilities
+│   │
+│   ├── crud/               # CRUD operations
+│   ├── db/                 # Database setup and session
+│   ├── models/             # SQLAlchemy models
+│   └── schemas/            # Pydantic schemas
+│
+├── migrations/             # Alembic migrations
+│   └── versions/           # Migration versions
+│
+├── alembic.ini             # Alembic configuration
+├── main.py                 # Application entry point
+├── requirements.txt        # Project dependencies
+└── README.md               # Project documentation
+```
+
+## Environment Variables
+
+The application uses the following environment variables:
+
+| Variable | Description | Default |
+|----------|-------------|---------|
+| `SECRET_KEY` | Secret key for JWT token generation | Auto-generated secure token |
+| `ACCESS_TOKEN_EXPIRE_MINUTES` | JWT token expiration time in minutes | 11520 (8 days) |
+| `DATABASE_URL` | SQLite database URL | `sqlite:////app/storage/db/db.sqlite` |
+
+## Getting Started
+
+### Prerequisites
+
+- Python 3.8+
+
+### Installation
+
+1. Clone the repository:
+
+```bash
+git clone <repository-url>
+cd taskmanagerapi
+```
+
+2. Install dependencies:
+
+```bash
+pip install -r requirements.txt
+```
+
+3. Run database migrations:
+
+```bash
+alembic upgrade head
+```
+
+### Running the Application
+
+Run the application with Uvicorn:
+
+```bash
+uvicorn main:app --reload
+```
+
+The API will be available at http://127.0.0.1:8000.
+
+## API Documentation
+
+Once the application is running, you can access:
+
+- Interactive API documentation: http://127.0.0.1:8000/docs
+- Alternative API documentation: http://127.0.0.1:8000/redoc
+- OpenAPI schema: http://127.0.0.1:8000/openapi.json
+
+## API Endpoints
+
+### Authentication
+
+- `POST /api/v1/auth/login` - Get access token
+- `POST /api/v1/auth/register` - Register a new user
+
+### Users
+
+- `GET /api/v1/users/me` - Get current user
+- `PUT /api/v1/users/me` - Update current user
+- `GET /api/v1/users/{user_id}` - Get user by ID (admin only)
+- `GET /api/v1/users/` - Get all users (admin only)
+
+### Tasks
+
+- `GET /api/v1/tasks/` - Get all user's tasks
+- `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 a task
+- `DELETE /api/v1/tasks/{task_id}` - Delete a task
+
+### Health Check
+
+- `GET /health` - Check API health status

alembic.ini

@@ -0,0 +1,86 @@
+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = migrations
+
+# template used to generate migration files
+# file_template = %%(rev)s_%%(slug)s
+
+# timezone to use when rendering the date
+# within the migration file as well as the filename.
+# 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
+# version_locations = %(here)s/bar %(here)s/bat migrations/versions
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+# SQLite URL example with absolute path
+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
+
+# 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

app/api/v1/api.py

@@ -0,0 +1,8 @@
+from fastapi import APIRouter
+
+from app.api.v1.endpoints import auth, tasks, users
+
+api_router = APIRouter()
+api_router.include_router(auth.router, prefix="/auth", tags=["auth"])
+api_router.include_router(users.router, prefix="/users", tags=["users"])
+api_router.include_router(tasks.router, prefix="/tasks", tags=["tasks"])

app/api/v1/endpoints/auth.py

@@ -0,0 +1,69 @@
+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.core.config import settings
+from app.core.security import create_access_token
+from app.db.session import get_db
+
+router = APIRouter()
+
+
+@router.post("/login", response_model=schemas.Token)
+def login_access_token(
+    db: Session = Depends(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",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    elif not crud.user.is_active(user):
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST, detail="Inactive user"
+        )
+    access_token_expires = timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
+    return {
+        "access_token": create_access_token(
+            user.id, expires_delta=access_token_expires
+        ),
+        "token_type": "bearer",
+    }
+
+
+@router.post("/register", response_model=schemas.User)
+def register_user(
+    *,
+    db: Session = Depends(get_db),
+    user_in: schemas.UserCreate,
+) -> Any:
+    """
+    Register a new user.
+    """
+    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",
+        )
+    
+    username_exists = crud.user.get_by_username(db, username=user_in.username)
+    if username_exists:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="A user with this username already exists",
+        )
+    
+    user = crud.user.create(db, obj_in=user_in)
+    return user

app/api/v1/endpoints/tasks.py

@@ -0,0 +1,98 @@
+from typing import Any, List
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.orm import Session
+
+from app import crud, schemas
+from app.core.security import get_current_active_user
+from app.db.session import get_db
+from app.models.user import User
+
+router = APIRouter()
+
+
+@router.get("/", response_model=List[schemas.Task])
+async def read_tasks(
+    db: Session = Depends(get_db),
+    skip: int = 0,
+    limit: int = 100,
+    current_user: User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Retrieve tasks.
+    """
+    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)
+async def create_task(
+    *,
+    db: Session = Depends(get_db),
+    task_in: schemas.TaskCreate,
+    current_user: User = Depends(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)
+async def read_task(
+    *,
+    db: Session = Depends(get_db),
+    task_id: int,
+    current_user: User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Get task by ID.
+    """
+    task = crud.task.get_by_id_and_owner(db=db, task_id=task_id, owner_id=current_user.id)
+    if not task:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Task not found"
+        )
+    return task
+
+
+@router.put("/{task_id}", response_model=schemas.Task)
+async def update_task(
+    *,
+    db: Session = Depends(get_db),
+    task_id: int,
+    task_in: schemas.TaskUpdate,
+    current_user: User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Update a task.
+    """
+    task = crud.task.get_by_id_and_owner(db=db, task_id=task_id, owner_id=current_user.id)
+    if not task:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Task not found"
+        )
+    task = crud.task.update(db=db, db_obj=task, obj_in=task_in)
+    return task
+
+
+@router.delete("/{task_id}", response_model=schemas.Task)
+async def delete_task(
+    *,
+    db: Session = Depends(get_db),
+    task_id: int,
+    current_user: User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Delete a task.
+    """
+    task = crud.task.get_by_id_and_owner(db=db, task_id=task_id, owner_id=current_user.id)
+    if not task:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="Task not found"
+        )
+    task = crud.task.remove(db=db, id=task_id)
+    return task

app/api/v1/endpoints/users.py

@@ -0,0 +1,79 @@
+from typing import Any, List
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.orm import Session
+
+from app import crud, schemas
+from app.core.security import get_current_active_user
+from app.db.session import get_db
+from app.models.user import User
+
+router = APIRouter()
+
+
+@router.get("/me", response_model=schemas.User)
+async def read_users_me(
+    current_user: User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Get current user.
+    """
+    return current_user
+
+
+@router.put("/me", response_model=schemas.User)
+async def update_user_me(
+    *,
+    db: Session = Depends(get_db),
+    user_in: schemas.UserUpdate,
+    current_user: User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Update own user.
+    """
+    user = crud.user.update(db, db_obj=current_user, obj_in=user_in)
+    return user
+
+
+@router.get("/{user_id}", response_model=schemas.User)
+async def read_user_by_id(
+    user_id: int,
+    current_user: User = Depends(get_current_active_user),
+    db: Session = Depends(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 current_user.is_superuser:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="The user doesn't have enough privileges",
+        )
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="User not found",
+        )
+    return user
+
+
+@router.get("/", response_model=List[schemas.User])
+async def read_users(
+    db: Session = Depends(get_db),
+    skip: int = 0,
+    limit: int = 100,
+    current_user: User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Retrieve users. Only superusers can access this endpoint.
+    """
+    if not current_user.is_superuser:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="The user doesn't have enough privileges",
+        )
+    users = crud.user.get_multi(db, skip=skip, limit=limit)
+    return users

app/core/config/__init__.py

@@ -0,0 +1,3 @@
+from .settings import settings
+
+__all__ = ["settings"]

app/core/config/settings.py

@@ -0,0 +1,28 @@
+import os
+import secrets
+
+from pydantic_settings import BaseSettings
+
+
+class Settings(BaseSettings):
+    API_V1_STR: str = "/api/v1"
+    PROJECT_NAME: str = "Task Manager API"
+    DESCRIPTION: str = "API for managing tasks and users"
+    VERSION: str = "0.1.0"
+    
+    # Security
+    SECRET_KEY: str = os.environ.get("SECRET_KEY", secrets.token_urlsafe(32))
+    # 8 days expiration
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = int(os.environ.get("ACCESS_TOKEN_EXPIRE_MINUTES", 60 * 24 * 8))
+    
+    # Database
+    SQLALCHEMY_DATABASE_URL: str = os.environ.get(
+        "DATABASE_URL", "sqlite:////app/storage/db/db.sqlite"
+    )
+    
+    class Config:
+        case_sensitive = True
+        env_file = ".env"
+
+
+settings = Settings()

app/core/security/__init__.py

@@ -0,0 +1,15 @@
+from .security import (
+    create_access_token,
+    get_current_active_user,
+    get_current_user,
+    get_password_hash,
+    verify_password,
+)
+
+__all__ = [
+    "create_access_token",
+    "verify_password",
+    "get_password_hash",
+    "get_current_user",
+    "get_current_active_user"
+]

app/core/security/security.py

@@ -0,0 +1,77 @@
+from datetime import datetime, timedelta
+from typing import Any, Union
+
+from fastapi import Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordBearer
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+from sqlalchemy.orm import Session
+
+from app.core.config import settings
+from app.db.session import get_db
+from app.models.user import User
+from app.schemas.token import TokenPayload
+
+# to get a string like this run:
+# openssl rand -hex 32
+SECRET_KEY = settings.SECRET_KEY
+ALGORITHM = "HS256"
+ACCESS_TOKEN_EXPIRE_MINUTES = settings.ACCESS_TOKEN_EXPIRE_MINUTES
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl=f"{settings.API_V1_STR}/auth/login")
+
+
+def create_access_token(
+    subject: Union[str, Any], expires_delta: timedelta = None
+) -> str:
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(
+            minutes=ACCESS_TOKEN_EXPIRE_MINUTES
+        )
+    to_encode = {"exp": expire, "sub": str(subject)}
+    encoded_jwt = jwt.encode(to_encode, 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)
+
+
+async def get_current_user(
+    db: Session = Depends(get_db), token: str = Depends(oauth2_scheme)
+) -> User:
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    try:
+        payload = jwt.decode(
+            token, SECRET_KEY, algorithms=[ALGORITHM]
+        )
+        token_data = TokenPayload(**payload)
+        if token_data.sub is None:
+            raise credentials_exception
+    except JWTError as e:
+        raise credentials_exception from e
+    
+    from app.crud import user as user_crud
+    user = user_crud.get(db, id=token_data.sub)
+    if user is None:
+        raise credentials_exception
+    return user
+
+
+async def get_current_active_user(
+    current_user: User = Depends(get_current_user),
+) -> User:
+    if not current_user.is_active:
+        raise HTTPException(status_code=400, detail="Inactive user")
+    return current_user

app/crud/__init__.py

@@ -0,0 +1,4 @@
+from .crud_task import task
+from .crud_user import user
+
+__all__ = ["user", "task"]

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.base 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

app/crud/crud_task.py

@@ -0,0 +1,42 @@
+from typing import List, Optional
+
+from sqlalchemy.orm import Session
+
+from app.crud.base import CRUDBase
+from app.models.task import Task
+from app.schemas.task import TaskCreate, TaskUpdate
+
+
+class CRUDTask(CRUDBase[Task, TaskCreate, TaskUpdate]):
+    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 create_with_owner(
+        self, db: Session, *, obj_in: TaskCreate, owner_id: int
+    ) -> Task:
+        obj_in_data = obj_in.model_dump()
+        db_obj = self.model(**obj_in_data, owner_id=owner_id)
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+    def get_by_id_and_owner(
+        self, db: Session, *, task_id: int, owner_id: int
+    ) -> Optional[Task]:
+        return (
+            db.query(self.model)
+            .filter(Task.id == task_id, Task.owner_id == owner_id)
+            .first()
+        )
+
+
+task = CRUDTask(Task)

app/crud/crud_user.py

@@ -0,0 +1,59 @@
+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,
+            is_active=obj_in.is_active,
+        )
+        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)

app/db/base.py

@@ -0,0 +1,3 @@
+from sqlalchemy.ext.declarative import declarative_base
+
+Base = declarative_base()

app/db/base_class.py

@@ -0,0 +1,14 @@
+from datetime import datetime
+
+from sqlalchemy import Column, DateTime, Integer
+from sqlalchemy.ext.declarative import declared_attr
+
+
+class Base:
+    id = Column(Integer, primary_key=True, index=True)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    
+    @declared_attr
+    def __tablename__(cls) -> str:
+        return cls.__name__.lower()

app/db/base_imports.py

@@ -0,0 +1,5 @@
+# Import all the models, so that Base has them before being
+# imported by Alembic
+from app.db.base import Base  # noqa
+from app.models.user import User  # noqa
+from app.models.task import Task  # noqa

app/db/init_db.py

@@ -0,0 +1,26 @@
+from sqlalchemy.orm import Session
+
+from app import crud, schemas
+from app.db import base  # noqa: F401
+
+# make sure all SQL Alchemy models are imported (app.db.base) before initializing DB
+# otherwise, SQL Alchemy might fail to initialize relationships properly
+# for more details: https://github.com/tiangolo/full-stack-fastapi-postgresql/issues/28
+
+
+def init_db(db: Session) -> None:
+    # Tables should be created with Alembic migrations
+    # But if you don't want to use migrations, create
+    # the tables uncommenting the next line
+    # Base.metadata.create_all(bind=engine)
+
+    # Create a superuser if it doesn't exist
+    user = crud.user.get_by_email(db, email="admin@example.com")
+    if not user:
+        user_in = schemas.UserCreate(
+            email="admin@example.com",
+            username="admin",
+            password="adminpassword",
+            is_superuser=True,
+        )
+        crud.user.create(db, obj_in=user_in)

app/db/session.py

@@ -0,0 +1,26 @@
+from pathlib import Path
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+from app.core.config import settings
+
+# Create storage directory if it doesn't exist
+DB_DIR = Path("/app") / "storage" / "db"
+DB_DIR.mkdir(parents=True, exist_ok=True)
+
+SQLALCHEMY_DATABASE_URL = settings.SQLALCHEMY_DATABASE_URL
+
+engine = create_engine(
+    SQLALCHEMY_DATABASE_URL,
+    connect_args={"check_same_thread": False}
+)
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()

app/models/__init__.py

@@ -0,0 +1,4 @@
+from .task import Task
+from .user import User
+
+__all__ = ["User", "Task"]

app/models/task.py

@@ -0,0 +1,33 @@
+import enum
+
+from sqlalchemy import Boolean, Column, Enum, ForeignKey, Integer, String, Text
+from sqlalchemy.orm import relationship
+
+from app.db.base import Base
+from app.db.base_class import Base as BaseClass
+
+
+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, BaseClass):
+    title = Column(String(100), 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)
+    is_completed = Column(Boolean, default=False)
+    
+    # Foreign key to user
+    owner_id = Column(Integer, ForeignKey("user.id"), nullable=False)
+    
+    # Relationship with user
+    owner = relationship("User", back_populates="tasks")

app/models/user.py

@@ -0,0 +1,16 @@
+from sqlalchemy import Boolean, Column, String
+from sqlalchemy.orm import relationship
+
+from app.db.base import Base
+from app.db.base_class import Base as BaseClass
+
+
+class User(Base, BaseClass):
+    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)
+    
+    # Relationship with tasks
+    tasks = relationship("Task", back_populates="owner", cascade="all, delete-orphan")

app/schemas/__init__.py

@@ -0,0 +1,9 @@
+from .task import Task, TaskCreate, TaskInDB, TaskUpdate
+from .token import Token, TokenPayload
+from .user import User, UserCreate, UserInDB, UserUpdate
+
+__all__ = [
+    "User", "UserCreate", "UserUpdate", "UserInDB",
+    "Task", "TaskCreate", "TaskUpdate", "TaskInDB",
+    "Token", "TokenPayload"
+]

app/schemas/task.py

@@ -0,0 +1,49 @@
+from datetime import datetime
+from typing import Optional
+
+from pydantic import BaseModel, Field
+
+from app.models.task import TaskPriority, TaskStatus
+
+
+# Shared properties
+class TaskBase(BaseModel):
+    title: Optional[str] = Field(None, min_length=1, max_length=100)
+    description: Optional[str] = None
+    status: Optional[TaskStatus] = None
+    priority: Optional[TaskPriority] = None
+    is_completed: Optional[bool] = None
+
+
+# Properties to receive on task creation
+class TaskCreate(TaskBase):
+    title: str = Field(..., min_length=1, max_length=100)
+    status: TaskStatus = TaskStatus.TODO
+    priority: TaskPriority = TaskPriority.MEDIUM
+
+
+# Properties to receive on task update
+class TaskUpdate(TaskBase):
+    pass
+
+
+# Properties shared by models stored in DB
+class TaskInDBBase(TaskBase):
+    id: int
+    title: str
+    owner_id: int
+    created_at: datetime
+    updated_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+# Properties to return to client
+class Task(TaskInDBBase):
+    pass
+
+
+# Properties stored in DB
+class TaskInDB(TaskInDBBase):
+    pass

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

app/schemas/user.py

@@ -0,0 +1,43 @@
+from datetime import datetime
+from typing import Optional
+
+from pydantic import BaseModel, EmailStr, Field
+
+
+# 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 = Field(..., min_length=3, max_length=50)
+    password: str = Field(..., min_length=8)
+
+
+# Properties to receive via API on update
+class UserUpdate(UserBase):
+    password: Optional[str] = Field(None, min_length=8)
+
+
+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

main.py

@@ -0,0 +1,45 @@
+
+import uvicorn
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from app.api.v1.api import api_router
+from app.core.config import settings
+
+app = FastAPI(
+    title=settings.PROJECT_NAME,
+    version=settings.VERSION,
+    description=settings.DESCRIPTION,
+    openapi_url="/openapi.json",
+    docs_url="/docs",
+    redoc_url="/redoc",
+)
+
+# Set up CORS middleware
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# Include API router
+app.include_router(api_router, prefix=settings.API_V1_STR)
+
+@app.get("/")
+async def root():
+    """Root endpoint returning service information"""
+    return {
+        "title": settings.PROJECT_NAME,
+        "docs": "/docs",
+        "health": "/health"
+    }
+
+@app.get("/health", status_code=200)
+async def health_check():
+    """Health check endpoint"""
+    return {"status": "healthy"}
+
+if __name__ == "__main__":
+    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)

migrations/env.py

@@ -0,0 +1,91 @@
+
+import os
+import sys
+from logging.config import fileConfig
+
+from alembic import context
+from sqlalchemy import engine_from_config, pool
+
+# 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.
+fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+
+# Ensure app directory is in the Python path
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from app.db.base_imports import Base  # noqa
+
+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():
+    """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"},
+        compare_type=True,
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online():
+    """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:
+        # Check if the dialect is SQLite to use batch mode
+        is_sqlite = connection.dialect.name == "sqlite"
+
+        context.configure(
+            connection=connection,
+            target_metadata=target_metadata,
+            render_as_batch=is_sqlite,  # Use batch mode for SQLite
+            compare_type=True,
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

migrations/script.py.mako

@@ -0,0 +1,24 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade():
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade():
+    ${downgrades if downgrades else "pass"}

migrations/versions/init_db.py

@@ -0,0 +1,68 @@
+"""init db
+
+Revision ID: 001_init_db
+Revises: 
+Create Date: 2023-11-14 12:00:00.000000
+
+"""
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = '001_init_db'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # Create users table
+    op.create_table(
+        'user',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('created_at', sa.DateTime(), nullable=True),
+        sa.Column('updated_at', sa.DateTime(), nullable=True),
+        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.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_user_email'), 'user', ['email'], unique=True)
+    op.create_index(op.f('ix_user_id'), 'user', ['id'], unique=False)
+    op.create_index(op.f('ix_user_username'), 'user', ['username'], unique=True)
+
+    # Create tasks table
+    op.create_table(
+        'task',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('created_at', sa.DateTime(), nullable=True),
+        sa.Column('updated_at', sa.DateTime(), nullable=True),
+        sa.Column('title', sa.String(100), nullable=False),
+        sa.Column('description', sa.Text(), nullable=True),
+        sa.Column('status', sa.Enum('todo', 'in_progress', 'done', name='taskstatus'), nullable=False),
+        sa.Column('priority', sa.Enum('low', 'medium', 'high', name='taskpriority'), nullable=False),
+        sa.Column('is_completed', sa.Boolean(), nullable=True),
+        sa.Column('owner_id', sa.Integer(), nullable=False),
+        sa.ForeignKeyConstraint(['owner_id'], ['user.id'], ),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_task_id'), 'task', ['id'], unique=False)
+    op.create_index(op.f('ix_task_title'), 'task', ['title'], unique=False)
+
+
+def downgrade():
+    # Drop tasks table
+    op.drop_index(op.f('ix_task_title'), table_name='task')
+    op.drop_index(op.f('ix_task_id'), table_name='task')
+    op.drop_table('task')
+    
+    # Drop enum types (only works in PostgreSQL, not SQLite)
+    # No need to drop enums in SQLite
+    
+    # Drop users table
+    op.drop_index(op.f('ix_user_username'), table_name='user')
+    op.drop_index(op.f('ix_user_id'), table_name='user')
+    op.drop_index(op.f('ix_user_email'), table_name='user')
+    op.drop_table('user')

pyproject.toml

@@ -0,0 +1,16 @@
+[tool.ruff]
+line-length = 120
+target-version = "py38"
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "B", "UP"]
+ignore = ["B008"]  # Allow function calls in argument defaults for FastAPI dependencies
+
+[tool.ruff.lint.isort]
+known-third-party = ["fastapi", "pydantic", "sqlalchemy", "alembic", "jose", "passlib"]
+
+[tool.ruff.format]
+quote-style = "double"
+indent-style = "space"
+skip-magic-trailing-comma = false
+line-ending = "auto"

requirements.txt

@@ -0,0 +1,12 @@
+fastapi>=0.104.1
+uvicorn>=0.24.0
+sqlalchemy>=2.0.23
+pydantic>=2.4.2
+pydantic-settings>=2.0.3
+alembic>=1.12.1
+python-jose[cryptography]>=3.3.0
+passlib[bcrypt]>=1.7.4
+python-multipart>=0.0.6
+email-validator>=2.1.0
+ruff>=0.1.5
+python-dotenv>=1.0.0