Implement task management tool with FastAPI and SQLite

- Setup project structure and FastAPI application - Create SQLite database with SQLAlchemy - Implement user authentication with JWT - Create task and user models - Add CRUD operations for tasks and users - Configure Alembic for database migrations - Implement API endpoints for task management - Add error handling and validation - Configure CORS middleware - Create health check endpoint - Add comprehensive documentation
2025-06-12 12:02:37 +00:00 · 2025-06-12 12:02:37 +00:00 · 350b445f45
commit 350b445f45
parent 6de1bc6843
40 changed files with 1289 additions and 2 deletions
--- a/README.md
+++ b/README.md
@ -1,3 +1,127 @@
-# FastAPI Application
+# Task Management Tool

-This is a FastAPI application bootstrapped by BackendIM, the AI-powered backend generation platform.
+A robust task management API built with FastAPI and SQLite.
+
+## Features
+
+- User authentication with JWT
+- Task management (create, read, update, delete)
+- Task priority and status tracking
+- Role-based access control (admin/regular users)
+- Error handling and validation
+- SQLite database with SQLAlchemy ORM
+- Database migrations with Alembic
+
+## Requirements
+
+- Python 3.8+
+- FastAPI
+- SQLAlchemy
+- Alembic
+- Pydantic
+- Python-jose
+- Passlib
+- Email-validator
+- Uvicorn
+
+## Installation
+
+1. Clone the repository
+
+```bash
+git clone <repository-url>
+cd taskmanagementtool
+```
+
+2. Install dependencies
+
+```bash
+pip install -r requirements.txt
+```
+
+3. Set up environment variables (or use default values for development)
+
+```bash
+# JWT Secret Key
+export SECRET_KEY="your-secret-key-here"
+
+# JWT Algorithm
+export ALGORITHM="HS256"
+
+# JWT Token Expiration (minutes)
+export ACCESS_TOKEN_EXPIRE_MINUTES="11520"  # 8 days
+```
+
+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
+
+API documentation is automatically generated and available at:
+
+- Swagger UI: http://localhost:8000/docs
+- ReDoc: http://localhost:8000/redoc
+
+## API Endpoints
+
+### Authentication
+
+- `POST /api/v1/auth/login` - Get access token
+- `POST /api/v1/auth/test-token` - Test if token is valid
+
+### Users
+
+- `GET /api/v1/users/` - List all users (admin only)
+- `POST /api/v1/users/` - Create a new user
+- `GET /api/v1/users/me` - Get current user information
+- `PUT /api/v1/users/me` - Update current user information
+- `GET /api/v1/users/{user_id}` - Get user by ID
+
+### Tasks
+
+- `GET /api/v1/tasks/` - List tasks (admins see all, users see their own)
+- `POST /api/v1/tasks/` - Create a new task
+- `GET /api/v1/tasks/{id}` - Get task by ID
+- `PUT /api/v1/tasks/{id}` - Update task
+- `DELETE /api/v1/tasks/{id}` - Delete task
+
+### Health
+
+- `GET /api/v1/health` - Check if the service is running
+
+## Task Model
+
+Tasks have the following attributes:
+
+- `id`: Unique identifier
+- `title`: Task title
+- `description`: Detailed description
+- `priority`: Priority level (LOW, MEDIUM, HIGH)
+- `status`: Current status (TODO, IN_PROGRESS, DONE)
+- `due_date`: Optional due date
+- `user_id`: Owner of the task
+- `created_at`: Creation timestamp
+- `updated_at`: Last update timestamp
+
+## Environment Variables
+
+| Variable | Description | Default |
+|----------|-------------|---------|
+| SECRET_KEY | JWT Secret Key | "YOUR_SECRET_KEY_HERE" |
+| ALGORITHM | JWT Algorithm | "HS256" |
+| ACCESS_TOKEN_EXPIRE_MINUTES | JWT Token Expiration (minutes) | 11520 (8 days) |
+
+## License
+
+This project is licensed under the MIT License.
--- a/alembic.ini
+++ b/alembic.ini
@ -0,0 +1,85 @@
+# 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 using 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
--- a/app/init.py
+++ b/app/init.py
--- a/app/api/init.py
+++ b/app/api/init.py
--- a/app/api/api_v1/init.py
+++ b/app/api/api_v1/init.py
--- a/app/api/api_v1/api.py
+++ b/app/api/api_v1/api.py
@ -0,0 +1,9 @@
+from fastapi import APIRouter
+
+from app.api.api_v1.endpoints import auth, health, tasks, users
+
+api_router = APIRouter()
+api_router.include_router(health.router, prefix="/health", tags=["health"])
+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"])
--- a/app/api/api_v1/endpoints/init.py
+++ b/app/api/api_v1/endpoints/init.py
--- a/app/api/api_v1/endpoints/auth.py
+++ b/app/api/api_v1/endpoints/auth.py
@ -0,0 +1,47 @@
+from datetime import timedelta
+from typing import Any
+
+from fastapi import APIRouter, Depends
+from fastapi.security import OAuth2PasswordRequestForm
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core import auth
+from app.core.config import settings
+from app.core.exceptions import InactiveUserException, InvalidCredentialsException
+from app.core.security import create_access_token
+from app.db.session import get_db
+from app.schemas.token import Token
+from app.schemas.user import User
+
+router = APIRouter()
+
+
+@router.post("/login", response_model=Token)
+async def login_access_token(
+    db: AsyncSession = Depends(get_db), form_data: OAuth2PasswordRequestForm = Depends()
+) -> Any:
+    """
+    OAuth2 compatible token login, get an access token for future requests
+    """
+    user = await auth.authenticate(
+        db, email=form_data.username, password=form_data.password
+    )
+    if not user:
+        raise InvalidCredentialsException()
+    if not user.is_active:
+        raise InactiveUserException()
+    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("/test-token", response_model=User)
+async def test_token(current_user: User = Depends(auth.get_current_user)) -> Any:
+    """
+    Test access token
+    """
+    return current_user
--- a/app/api/api_v1/endpoints/health.py
+++ b/app/api/api_v1/endpoints/health.py
@ -0,0 +1,13 @@
+from fastapi import APIRouter, Depends
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.db.session import get_db
+
+router = APIRouter()
+
+@router.get("")
+async def health_check(db: AsyncSession = Depends(get_db)):
+    """
+    Health check endpoint
+    """
+    return {"status": "ok", "message": "Service is running"}
--- a/app/api/api_v1/endpoints/tasks.py
+++ b/app/api/api_v1/endpoints/tasks.py
@ -0,0 +1,103 @@
+from typing import Any, List
+
+from fastapi import APIRouter, Depends
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core import auth
+from app.core.exceptions import ForbiddenException, NotFoundException
+from app.crud.crud_task import task
+from app.db.session import get_db
+from app.models.user import User
+from app.schemas.task import Task, TaskCreate, TaskUpdate
+
+router = APIRouter()
+
+
+@router.get("/", response_model=List[Task])
+async def read_tasks(
+    db: AsyncSession = Depends(get_db),
+    skip: int = 0,
+    limit: int = 100,
+    current_user: User = Depends(auth.get_current_active_user),
+) -> Any:
+    """
+    Retrieve tasks.
+    """
+    if current_user.is_superuser:
+        tasks = await task.get_multi(db, skip=skip, limit=limit)
+    else:
+        tasks = await task.get_multi_by_owner(
+            db=db, owner_id=current_user.id, skip=skip, limit=limit
+        )
+    return tasks
+
+
+@router.post("/", response_model=Task)
+async def create_task(
+    *,
+    db: AsyncSession = Depends(get_db),
+    task_in: TaskCreate,
+    current_user: User = Depends(auth.get_current_active_user),
+) -> Any:
+    """
+    Create new task.
+    """
+    task_obj = await task.create_with_owner(db=db, obj_in=task_in, owner_id=current_user.id)
+    return task_obj
+
+
+@router.put("/{task_id}", response_model=Task)
+async def update_task(
+    *,
+    db: AsyncSession = Depends(get_db),
+    task_id: str,
+    task_in: TaskUpdate,
+    current_user: User = Depends(auth.get_current_active_user),
+) -> Any:
+    """
+    Update a task.
+    """
+    task_obj = await task.get(db=db, id_=task_id)
+    if not task_obj:
+        raise NotFoundException("Task not found")
+    if not current_user.is_superuser and (task_obj.user_id != current_user.id):
+        raise ForbiddenException("Not enough permissions")
+    task_obj = await task.update(db=db, db_obj=task_obj, obj_in=task_in)
+    return task_obj
+
+
+@router.get("/{task_id}", response_model=Task)
+async def read_task(
+    *,
+    db: AsyncSession = Depends(get_db),
+    task_id: str,
+    current_user: User = Depends(auth.get_current_active_user),
+) -> Any:
+    """
+    Get task by ID.
+    """
+    task_obj = await task.get(db=db, id_=task_id)
+    if not task_obj:
+        raise NotFoundException("Task not found")
+    if not current_user.is_superuser and (task_obj.user_id != current_user.id):
+        raise ForbiddenException("Not enough permissions")
+    return task_obj
+
+
+@router.delete("/{task_id}", response_model=Task)
+async def delete_task(
+    *,
+    db: AsyncSession = Depends(get_db),
+    task_id: str,
+    current_user: User = Depends(auth.get_current_active_user),
+) -> Any:
+    """
+    Delete a task.
+    """
+    task_obj = await task.get(db=db, id_=task_id)
+    if not task_obj:
+        raise NotFoundException("Task not found")
+    if not current_user.is_superuser and (task_obj.user_id != current_user.id):
+        raise ForbiddenException("Not enough permissions")
+    task_obj = await task.remove(db=db, id_=task_id)
+    return task_obj
--- a/app/api/api_v1/endpoints/users.py
+++ b/app/api/api_v1/endpoints/users.py
@ -0,0 +1,99 @@
+from typing import Any, List
+
+from fastapi import APIRouter, Depends
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core import auth
+from app.core.exceptions import (
+    EmailAlreadyExistsException,
+    ForbiddenException,
+    NotFoundException,
+    UsernameAlreadyExistsException,
+)
+from app.crud.crud_user import user
+from app.db.session import get_db
+from app.schemas.user import User, UserCreate, UserUpdate
+
+router = APIRouter()
+
+
+@router.get("/", response_model=List[User])
+async def read_users(
+    db: AsyncSession = Depends(get_db),
+    skip: int = 0,
+    limit: int = 100,
+    current_user: User = Depends(auth.get_current_active_superuser),
+) -> Any:
+    """
+    Retrieve users.
+    """
+    users = await user.get_multi(db, skip=skip, limit=limit)
+    return users
+
+
+@router.post("/", response_model=User)
+async def create_user(
+    *,
+    db: AsyncSession = Depends(get_db),
+    user_in: UserCreate,
+) -> Any:
+    """
+    Create new user.
+    """
+    user_obj = await user.get_by_email(db, email=user_in.email)
+    if user_obj:
+        raise EmailAlreadyExistsException()
+    username_obj = await user.get_by_username(db, username=user_in.username)
+    if username_obj:
+        raise UsernameAlreadyExistsException()
+    user_obj = await user.create(db, obj_in=user_in)
+    return user_obj
+
+
+@router.put("/me", response_model=User)
+async def update_user_me(
+    *,
+    db: AsyncSession = Depends(get_db),
+    user_in: UserUpdate,
+    current_user: User = Depends(auth.get_current_active_user),
+) -> Any:
+    """
+    Update own user.
+    """
+    if user_in.email and user_in.email != current_user.email:
+        user_obj = await user.get_by_email(db, email=user_in.email)
+        if user_obj:
+            raise EmailAlreadyExistsException()
+    if user_in.username and user_in.username != current_user.username:
+        username_obj = await user.get_by_username(db, username=user_in.username)
+        if username_obj:
+            raise UsernameAlreadyExistsException()
+    user_obj = await user.update(db, db_obj=current_user, obj_in=user_in)
+    return user_obj
+
+
+@router.get("/me", response_model=User)
+async def read_user_me(
+    current_user: User = Depends(auth.get_current_active_user),
+) -> Any:
+    """
+    Get current user.
+    """
+    return current_user
+
+
+@router.get("/{user_id}", response_model=User)
+async def read_user_by_id(
+    user_id: str,
+    current_user: User = Depends(auth.get_current_active_user),
+    db: AsyncSession = Depends(get_db),
+) -> Any:
+    """
+    Get a specific user by id.
+    """
+    user_obj = await user.get(db, id_=user_id)
+    if not user_obj:
+        raise NotFoundException("The user with this id does not exist in the system")
+    if user_obj.id != current_user.id and not current_user.is_superuser:
+        raise ForbiddenException("The user doesn't have enough privileges")
+    return user_obj
--- a/app/core/init.py
+++ b/app/core/init.py
--- a/app/core/auth.py
+++ b/app/core/auth.py
@ -0,0 +1,70 @@
+from datetime import datetime
+from typing import Optional
+
+from fastapi import Depends
+from fastapi.security import OAuth2PasswordBearer
+from jose import JWTError, jwt
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.config import settings
+from app.core.exceptions import (
+    ForbiddenException,
+    InactiveUserException,
+    UnauthorizedException,
+)
+from app.core.security import verify_password
+from app.crud.crud_user import user
+from app.db.session import get_db
+from app.models.user import User
+from app.schemas.token import TokenPayload
+
+oauth2_scheme = OAuth2PasswordBearer(
+    tokenUrl=f"{settings.API_V1_STR}/auth/login"
+)
+
+
+async def get_current_user(
+    db: AsyncSession = Depends(get_db), token: str = Depends(oauth2_scheme)
+) -> User:
+    credentials_exception = UnauthorizedException("Could not validate credentials")
+    try:
+        payload = jwt.decode(
+            token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM]
+        )
+        token_data = TokenPayload(**payload)
+        if datetime.fromtimestamp(token_data.exp) < datetime.now():
+            raise credentials_exception
+    except JWTError as e:
+        raise credentials_exception from e
+    
+    user_obj = await user.get(db, id_=token_data.sub)
+    if not user_obj:
+        raise credentials_exception
+    return user_obj
+
+
+async def get_current_active_user(
+    current_user: User = Depends(get_current_user),
+) -> User:
+    if not current_user.is_active:
+        raise InactiveUserException()
+    return current_user
+
+
+async def get_current_active_superuser(
+    current_user: User = Depends(get_current_user),
+) -> User:
+    if not current_user.is_superuser:
+        raise ForbiddenException("The user doesn't have enough privileges")
+    return current_user
+
+
+async def authenticate(
+    db: AsyncSession, *, email: str, password: str
+) -> Optional[User]:
+    user_obj = await user.get_by_email(db, email=email)
+    if not user_obj:
+        return None
+    if not verify_password(password, user_obj.hashed_password):
+        return None
+    return user_obj
--- a/app/core/config.py
+++ b/app/core/config.py
@ -0,0 +1,32 @@
+from typing import List
+
+from pydantic import validator
+from pydantic_settings import BaseSettings
+
+
+class Settings(BaseSettings):
+    API_V1_STR: str = "/api/v1"
+    PROJECT_NAME: str = "Task Management Tool"
+    
+    # CORS Origins
+    BACKEND_CORS_ORIGINS: List[str] = ["*"]
+
+    @validator("BACKEND_CORS_ORIGINS", pre=True)
+    def assemble_cors_origins(self, v: str | List[str]) -> List[str] | str:
+        if isinstance(v, str) and not v.startswith("["):
+            return [i.strip() for i in v.split(",")]
+        if isinstance(v, (list, str)):
+            return v
+        raise ValueError(v)
+
+    # JWT
+    SECRET_KEY: str = "YOUR_SECRET_KEY_HERE"  # Change in production
+    ALGORITHM: str = "HS256"
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = 60 * 24 * 8  # 8 days
+
+    class Config:
+        case_sensitive = True
+        env_file = ".env"
+
+
+settings = Settings()
--- a/app/core/exceptions.py
+++ b/app/core/exceptions.py
@ -0,0 +1,53 @@
+from fastapi import HTTPException, status
+
+
+class TaskManagementException(HTTPException):
+    def __init__(
+        self,
+        status_code: int,
+        detail: str = None,
+    ) -> None:
+        super().__init__(status_code=status_code, detail=detail)
+
+
+class NotFoundException(TaskManagementException):
+    def __init__(self, detail: str = "Item not found") -> None:
+        super().__init__(status_code=status.HTTP_404_NOT_FOUND, detail=detail)
+
+
+class BadRequestException(TaskManagementException):
+    def __init__(self, detail: str = "Bad request") -> None:
+        super().__init__(status_code=status.HTTP_400_BAD_REQUEST, detail=detail)
+
+
+class UnauthorizedException(TaskManagementException):
+    def __init__(self, detail: str = "Not authenticated") -> None:
+        super().__init__(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail=detail,
+        )
+
+
+class ForbiddenException(TaskManagementException):
+    def __init__(self, detail: str = "Not enough permissions") -> None:
+        super().__init__(status_code=status.HTTP_403_FORBIDDEN, detail=detail)
+
+
+class EmailAlreadyExistsException(BadRequestException):
+    def __init__(self) -> None:
+        super().__init__("The user with this email already exists in the system")
+
+
+class UsernameAlreadyExistsException(BadRequestException):
+    def __init__(self) -> None:
+        super().__init__("The username is already taken")
+
+
+class InvalidCredentialsException(BadRequestException):
+    def __init__(self) -> None:
+        super().__init__("Incorrect email or password")
+
+
+class InactiveUserException(BadRequestException):
+    def __init__(self) -> None:
+        super().__init__("Inactive user")
--- a/app/core/security.py
+++ b/app/core/security.py
@ -0,0 +1,38 @@
+import uuid
+from datetime import datetime, timedelta
+from typing import Any, Union
+
+from jose import jwt
+from passlib.context import CryptContext
+
+from app.core.config import settings
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+
+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=settings.ACCESS_TOKEN_EXPIRE_MINUTES
+        )
+    to_encode = {"exp": expire, "sub": str(subject)}
+    encoded_jwt = jwt.encode(
+        to_encode, settings.SECRET_KEY, algorithm=settings.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)
+
+
+def generate_uuid() -> str:
+    return str(uuid.uuid4())
--- a/app/crud/init.py
+++ b/app/crud/init.py
--- a/app/crud/base.py
+++ b/app/crud/base.py
@ -0,0 +1,70 @@
+from typing import Any, Dict, Generic, List, Optional, Type, TypeVar, Union
+
+from fastapi.encoders import jsonable_encoder
+from pydantic import BaseModel
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy.future import select
+
+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
+
+    async def get(self, db: AsyncSession, id_: Any) -> Optional[ModelType]:
+        result = await db.execute(select(self.model).filter(self.model.id == id_))
+        return result.scalars().first()
+
+    async def get_multi(
+        self, db: AsyncSession, *, skip: int = 0, limit: int = 100
+    ) -> List[ModelType]:
+        result = await db.execute(select(self.model).offset(skip).limit(limit))
+        return result.scalars().all()
+
+    async def create(self, db: AsyncSession, *, obj_in: CreateSchemaType) -> ModelType:
+        obj_in_data = jsonable_encoder(obj_in)
+        db_obj = self.model(**obj_in_data)
+        db.add(db_obj)
+        await db.commit()
+        await db.refresh(db_obj)
+        return db_obj
+
+    async def update(
+        self,
+        db: AsyncSession,
+        *,
+        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.dict(exclude_unset=True)
+        for field in obj_data:
+            if field in update_data:
+                setattr(db_obj, field, update_data[field])
+        db.add(db_obj)
+        await db.commit()
+        await db.refresh(db_obj)
+        return db_obj
+
+    async def remove(self, db: AsyncSession, *, id_: str) -> ModelType:
+        obj = await db.execute(select(self.model).filter(self.model.id == id_))
+        obj = obj.scalars().first()
+        await db.delete(obj)
+        await db.commit()
+        return obj
--- a/app/crud/crud_task.py
+++ b/app/crud/crud_task.py
@ -0,0 +1,35 @@
+from typing import List
+
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy.future import select
+
+from app.core.security import generate_uuid
+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]):
+    async def create_with_owner(
+        self, db: AsyncSession, *, obj_in: TaskCreate, owner_id: str
+    ) -> Task:
+        obj_in_data = obj_in.dict()
+        db_obj = Task(**obj_in_data, id=generate_uuid(), user_id=owner_id)
+        db.add(db_obj)
+        await db.commit()
+        await db.refresh(db_obj)
+        return db_obj
+
+    async def get_multi_by_owner(
+        self, db: AsyncSession, *, owner_id: str, skip: int = 0, limit: int = 100
+    ) -> List[Task]:
+        result = await db.execute(
+            select(Task)
+            .filter(Task.user_id == owner_id)
+            .offset(skip)
+            .limit(limit)
+        )
+        return result.scalars().all()
+
+
+task = CRUDTask(Task)
--- a/app/crud/crud_user.py
+++ b/app/crud/crud_user.py
@ -0,0 +1,65 @@
+from typing import Any, Dict, Optional, Union
+
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy.future import select
+
+from app.core.security import generate_uuid, 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]):
+    async def get_by_email(self, db: AsyncSession, *, email: str) -> Optional[User]:
+        result = await db.execute(select(User).filter(User.email == email))
+        return result.scalars().first()
+    
+    async def get_by_username(self, db: AsyncSession, *, username: str) -> Optional[User]:
+        result = await db.execute(select(User).filter(User.username == username))
+        return result.scalars().first()
+
+    async def create(self, db: AsyncSession, *, obj_in: UserCreate) -> User:
+        db_obj = User(
+            id=generate_uuid(),
+            email=obj_in.email,
+            username=obj_in.username,
+            hashed_password=get_password_hash(obj_in.password),
+            full_name=obj_in.full_name,
+            is_superuser=obj_in.is_superuser,
+        )
+        db.add(db_obj)
+        await db.commit()
+        await db.refresh(db_obj)
+        return db_obj
+
+    async def update(
+        self, db: AsyncSession, *, 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.dict(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 await super().update(db, db_obj=db_obj, obj_in=update_data)
+
+    async def authenticate(self, db: AsyncSession, *, email: str, password: str) -> Optional[User]:
+        user = await 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/base.py
+++ b/app/db/base.py
@ -0,0 +1,3 @@
+from sqlalchemy.ext.declarative import declarative_base
+
+Base = declarative_base()
--- a/app/db/base_class.py
+++ b/app/db/base_class.py
--- a/app/db/session.py
+++ b/app/db/session.py
@ -0,0 +1,41 @@
+from pathlib import Path
+
+from sqlalchemy import create_engine
+from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine
+from sqlalchemy.orm import sessionmaker
+
+# Ensure the DB directory exists
+DB_DIR = Path("/app/storage/db")
+DB_DIR.mkdir(parents=True, exist_ok=True)
+
+# Database URLs
+SQLALCHEMY_DATABASE_URL = f"sqlite:///{DB_DIR}/db.sqlite"
+ASYNC_SQLALCHEMY_DATABASE_URL = f"sqlite+aiosqlite:///{DB_DIR}/db.sqlite"
+
+# Create engines
+engine = create_engine(
+    SQLALCHEMY_DATABASE_URL,
+    connect_args={"check_same_thread": False}
+)
+
+async_engine = create_async_engine(
+    ASYNC_SQLALCHEMY_DATABASE_URL,
+    connect_args={"check_same_thread": False}
+)
+
+# Create sessions
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+AsyncSessionLocal = sessionmaker(
+    autocommit=False,
+    autoflush=False,
+    bind=async_engine,
+    class_=AsyncSession,
+)
+
+# Dependency for FastAPI endpoints
+async def get_db():
+    async with AsyncSessionLocal() as session:
+        try:
+            yield session
+        finally:
+            await session.close()
--- a/app/models/init.py
+++ b/app/models/init.py
--- a/app/models/task.py
+++ b/app/models/task.py
@ -0,0 +1,36 @@
+import enum
+
+from sqlalchemy import Column, DateTime, Enum, ForeignKey, String, Text
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+
+from app.db.base import Base
+
+
+class TaskPriority(str, enum.Enum):
+    LOW = "low"
+    MEDIUM = "medium"
+    HIGH = "high"
+
+
+class TaskStatus(str, enum.Enum):
+    TODO = "todo"
+    IN_PROGRESS = "in_progress"
+    DONE = "done"
+
+
+class Task(Base):
+    __tablename__ = "tasks"
+
+    id = Column(String, primary_key=True, index=True)
+    title = Column(String, index=True, nullable=False)
+    description = Column(Text, nullable=True)
+    priority = Column(Enum(TaskPriority), default=TaskPriority.MEDIUM)
+    status = Column(Enum(TaskStatus), default=TaskStatus.TODO)
+    due_date = Column(DateTime(timezone=True), nullable=True)
+    user_id = Column(String, ForeignKey("users.id"))
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+    
+    # Relationships
+    owner = relationship("User", back_populates="tasks")
--- a/app/models/user.py
+++ b/app/models/user.py
@ -0,0 +1,22 @@
+from sqlalchemy import Boolean, Column, DateTime, String
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+
+from app.db.base import Base
+
+
+class User(Base):
+    __tablename__ = "users"
+
+    id = Column(String, 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)
+    full_name = Column(String, nullable=True)
+    is_active = Column(Boolean, default=True)
+    is_superuser = Column(Boolean, default=False)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+    
+    # Relationships
+    tasks = relationship("Task", back_populates="owner")
--- a/app/schemas/init.py
+++ b/app/schemas/init.py
--- a/app/schemas/task.py
+++ b/app/schemas/task.py
@ -0,0 +1,47 @@
+from datetime import datetime
+from typing import Optional
+
+from pydantic import BaseModel
+
+from app.models.task import TaskPriority, TaskStatus
+
+
+# Shared properties
+class TaskBase(BaseModel):
+    title: Optional[str] = None
+    description: Optional[str] = None
+    priority: Optional[TaskPriority] = TaskPriority.MEDIUM
+    status: Optional[TaskStatus] = TaskStatus.TODO
+    due_date: Optional[datetime] = None
+
+
+# Properties to receive on task creation
+class TaskCreate(TaskBase):
+    title: str
+
+
+# Properties to receive on task update
+class TaskUpdate(TaskBase):
+    pass
+
+
+# Properties shared by models stored in DB
+class TaskInDBBase(TaskBase):
+    id: str
+    title: str
+    user_id: str
+    created_at: datetime
+    updated_at: Optional[datetime] = None
+
+    class Config:
+        from_attributes = True
+
+
+# Properties to return to client
+class Task(TaskInDBBase):
+    pass
+
+
+# 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[str] = None
--- a/app/schemas/user.py
+++ b/app/schemas/user.py
@ -0,0 +1,45 @@
+from datetime import datetime
+from typing import Optional
+
+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: Optional[bool] = False
+    full_name: Optional[str] = None
+
+
+# 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
+
+
+# Additional properties to return via API
+class UserInDBBase(UserBase):
+    id: str
+    created_at: datetime
+    updated_at: Optional[datetime] = None
+
+    class Config:
+        from_attributes = True
+
+
+# Additional properties stored in DB
+class UserInDB(UserInDBBase):
+    hashed_password: str
+
+
+# Additional properties to return via API
+class User(UserInDBBase):
+    pass
--- a/app/utils/init.py
+++ b/app/utils/init.py
--- a/main.py
+++ b/main.py
@ -0,0 +1,38 @@
+
+import uvicorn
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from app.api.api_v1.api import api_router
+from app.core.config import settings
+
+app = FastAPI(
+    title=settings.PROJECT_NAME,
+    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)
+
+# Root endpoint
+@app.get("/")
+async def root():
+    return {
+        "title": settings.PROJECT_NAME,
+        "docs": f"{settings.API_V1_STR}/docs",
+        "health": f"{settings.API_V1_STR}/health"
+    }
+
+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 +1,86 @@
+import os
+
+# Import Base and models
+import sys
+from logging.config import fileConfig
+
+from alembic import context
+from sqlalchemy import engine_from_config, pool
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+from app.db.base import Base
+from app.db.base_class import *  # 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.
+fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+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"},
+    )
+
+    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:
+        is_sqlite = connection.dialect.name == 'sqlite'
+        context.configure(
+            connection=connection,
+            target_metadata=target_metadata,
+            render_as_batch=is_sqlite,  # Key configuration 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 +1,24 @@
+"""${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"}
--- a/migrations/versions/001_initial_migration.py
+++ b/migrations/versions/001_initial_migration.py
@ -0,0 +1,66 @@
+"""Initial migration
+
+Revision ID: 001
+Revises: 
+Create Date: 2023-10-28
+
+"""
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = '001'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # Create users table
+    op.create_table(
+        'users',
+        sa.Column('id', sa.String(), 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('full_name', sa.String(), nullable=True),
+        sa.Column('is_active', sa.Boolean(), nullable=True),
+        sa.Column('is_superuser', sa.Boolean(), nullable=True),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('(CURRENT_TIMESTAMP)'), nullable=True),
+        sa.Column('updated_at', sa.DateTime(timezone=True), 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
+    op.create_table(
+        'tasks',
+        sa.Column('id', sa.String(), nullable=False),
+        sa.Column('title', sa.String(), nullable=False),
+        sa.Column('description', sa.Text(), nullable=True),
+        sa.Column('priority', sa.Enum('LOW', 'MEDIUM', 'HIGH', name='taskpriority'), nullable=True),
+        sa.Column('status', sa.Enum('TODO', 'IN_PROGRESS', 'DONE', name='taskstatus'), nullable=True),
+        sa.Column('due_date', sa.DateTime(timezone=True), nullable=True),
+        sa.Column('user_id', sa.String(), nullable=True),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('(CURRENT_TIMESTAMP)'), nullable=True),
+        sa.Column('updated_at', sa.DateTime(timezone=True), nullable=True),
+        sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
+        sa.PrimaryKeyConstraint('id')
+    )
+    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():
+    # Drop tasks table
+    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')
+    
+    # Drop users table
+    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/migrations/versions/init.py
+++ b/migrations/versions/init.py
--- a/pyproject.toml
+++ b/pyproject.toml
@ -0,0 +1,13 @@
+[tool.ruff]
+line-length = 88
+target-version = "py38"
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "UP", "N", "B", "A", "C4", "RET", "SIM"]
+ignore = ["E203", "E501", "RET504", "B008"]
+
+[tool.ruff.lint.isort]
+known-third-party = ["fastapi", "pydantic", "sqlalchemy", "starlette"]
+
+[tool.ruff.lint.flake8-quotes]
+docstring-quotes = "double"
--- a/requirements.txt
+++ b/requirements.txt
@ -0,0 +1,11 @@
+fastapi>=0.104.0
+uvicorn>=0.23.2
+sqlalchemy>=2.0.0
+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>=0.1.3