Create Task Manager API with FastAPI and SQLite

- Set up project structure and dependencies
- Create task model and schema
- Implement Alembic migrations
- Add CRUD API endpoints for task management
- Add health endpoint with database connectivity check
- Add comprehensive error handling
- Add tests for API endpoints
- Update README with API documentation

README.md

@@ -1,3 +1,128 @@
-# 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 built with FastAPI and SQLite.
+
+## Features
+
+- CRUD operations for tasks
+- Filtering by task status, priority, and title search
+- Health check endpoint with database connectivity check
+- Comprehensive error handling
+- Database migrations with Alembic
+- Complete test suite
+
+## Technical Stack
+
+- **Python 3.9+**
+- **FastAPI** - High-performance web framework
+- **SQLite** - Database
+- **SQLAlchemy** - ORM
+- **Alembic** - Database migrations
+- **Pydantic** - Data validation
+- **Pytest** - Testing
+
+## Setup and Installation
+
+### Prerequisites
+
+- Python 3.9 or higher
+
+### Installation
+
+1. Clone the repository
+2. Install dependencies:
+
+```bash
+pip install -r requirements.txt
+```
+
+3. Set up environment variables (optional):
+
+```bash
+# Enable debug mode
+export DEBUG=True
+```
+
+### Database Setup
+
+The database will be automatically created at `/app/storage/db/db.sqlite` when the application starts. To apply migrations:
+
+```bash
+alembic upgrade head
+```
+
+### Running the API
+
+```bash
+# Development mode with auto-reload
+uvicorn main:app --reload
+
+# Production mode
+uvicorn main:app --host 0.0.0.0 --port 8000
+```
+
+## API Documentation
+
+The API documentation is available at `/docs` or `/redoc` when the server is running.
+
+### Endpoints
+
+#### Health Check
+
+```
+GET /health
+```
+
+Returns the health status of the API, including database connectivity.
+
+#### Tasks
+
+| Method | Endpoint | Description |
+|--------|----------|-------------|
+| GET | `/api/v1/tasks` | List all tasks with optional filtering |
+| POST | `/api/v1/tasks` | Create a new task |
+| GET | `/api/v1/tasks/{task_id}` | Get a specific task by ID |
+| PUT | `/api/v1/tasks/{task_id}` | Update a specific task |
+| DELETE | `/api/v1/tasks/{task_id}` | Delete a specific task |
+
+### Filtering Tasks
+
+The `GET /api/v1/tasks` endpoint supports the following query parameters:
+
+- `completed` - Filter by completion status (true/false)
+- `priority` - Filter by priority level (1-3)
+- `search` - Search by task title
+- `skip` - Number of items to skip (pagination)
+- `limit` - Maximum number of items to return (pagination)
+
+### Task Object Structure
+
+```json
+{
+  "id": 1,
+  "title": "Task Title",
+  "description": "Task description",
+  "completed": false,
+  "priority": 2,
+  "due_date": "2023-09-30T00:00:00",
+  "created_at": "2023-09-01T12:00:00",
+  "updated_at": "2023-09-01T12:00:00"
+}
+```
+
+## Testing
+
+Run the test suite with:
+
+```bash
+pytest
+```
+
+## Development
+
+### Running Linting
+
+```bash
+ruff check .
+ruff check --fix .
+```

alembic.ini

@@ -0,0 +1,102 @@
+# 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
+
+# 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 in a Windows environment.
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+# SQLite URL 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 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

app/api/v1/api.py

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

app/api/v1/tasks.py

@@ -0,0 +1,108 @@
+from typing import Any, List, Optional
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.orm import Session
+
+from app import schemas, crud
+from app.db.session import get_db
+
+router = APIRouter()
+
+
+@router.get("/", response_model=List[schemas.Task])
+def read_tasks(
+    db: Session = Depends(get_db),
+    skip: int = 0,
+    limit: int = 100,
+    completed: Optional[bool] = None,
+    priority: Optional[int] = None,
+    search: Optional[str] = None,
+) -> Any:
+    """
+    Retrieve tasks with optional filtering.
+    """
+    if completed is not None:
+        tasks = crud.task.get_multi_by_completed(
+            db, completed=completed, skip=skip, limit=limit
+        )
+    elif priority is not None:
+        tasks = crud.task.get_multi_by_priority(
+            db, priority=priority, skip=skip, limit=limit
+        )
+    elif search is not None:
+        tasks = crud.task.search_by_title(
+            db, title=search, skip=skip, limit=limit
+        )
+    else:
+        tasks = crud.task.get_multi(db, skip=skip, limit=limit)
+    return tasks
+
+
+@router.post("/", response_model=schemas.Task, status_code=status.HTTP_201_CREATED)
+def create_task(
+    *,
+    db: Session = Depends(get_db),
+    task_in: schemas.TaskCreate,
+) -> Any:
+    """
+    Create new task.
+    """
+    task = crud.task.create(db=db, obj_in=task_in)
+    return task
+
+
+@router.get("/{task_id}", response_model=schemas.Task)
+def read_task(
+    *,
+    db: Session = Depends(get_db),
+    task_id: int,
+) -> 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"
+        )
+    return task
+
+
+@router.put("/{task_id}", response_model=schemas.Task)
+def update_task(
+    *,
+    db: Session = Depends(get_db),
+    task_id: int,
+    task_in: schemas.TaskUpdate,
+) -> 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"
+        )
+    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(get_db),
+    task_id: int,
+) -> Any:
+    """
+    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"
+        )
+    crud.task.remove(db=db, id=task_id)
+    return None

app/core/config.py

@@ -0,0 +1,22 @@
+import os
+from pathlib import Path
+from pydantic_settings import BaseSettings
+
+class Settings(BaseSettings):
+    # API settings
+    PROJECT_NAME: str = "Task Manager API"
+    API_V1_STR: str = "/api/v1"
+    DEBUG: bool = os.getenv("DEBUG", "False").lower() in ("true", "1", "t")
+    
+    # SQLite Database settings
+    DB_DIR: Path = Path("/app") / "storage" / "db"
+    
+    class Config:
+        env_file = ".env"
+        case_sensitive = True
+
+# Create settings instance
+settings = Settings()
+
+# Ensure DB directory exists
+settings.DB_DIR.mkdir(parents=True, exist_ok=True)

app/core/exceptions.py

@@ -0,0 +1,62 @@
+from fastapi import HTTPException, Request, status
+from fastapi.exceptions import RequestValidationError
+from fastapi.responses import JSONResponse
+from starlette.exceptions import HTTPException as StarletteHTTPException
+
+from app.core.config import settings
+
+
+async def http_exception_handler(request: Request, exc: HTTPException) -> JSONResponse:
+    """
+    Handle HTTPExceptions and return a consistent response format.
+    """
+    return JSONResponse(
+        status_code=exc.status_code,
+        content={
+            "success": False,
+            "message": exc.detail,
+            "data": None,
+        },
+    )
+
+
+async def validation_exception_handler(request: Request, exc: RequestValidationError) -> JSONResponse:
+    """
+    Handle validation errors and return a consistent response format.
+    """
+    return JSONResponse(
+        status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,
+        content={
+            "success": False,
+            "message": "Validation error",
+            "data": None,
+            "errors": exc.errors(),
+        },
+    )
+
+
+async def unexpected_exception_handler(request: Request, exc: Exception) -> JSONResponse:
+    """
+    Handle all other exceptions with a generic 500 error.
+    """
+    return JSONResponse(
+        status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+        content={
+            "success": False,
+            "message": "Internal server error",
+            "data": None,
+        },
+    )
+
+
+def register_exception_handlers(app):
+    """
+    Register exception handlers with the FastAPI app.
+    """
+    app.add_exception_handler(StarletteHTTPException, http_exception_handler)
+    app.add_exception_handler(HTTPException, http_exception_handler)
+    app.add_exception_handler(RequestValidationError, validation_exception_handler)
+    
+    # Only register generic handler in production
+    if not settings.DEBUG:
+        app.add_exception_handler(Exception, unexpected_exception_handler)

app/crud/__init__.py

@@ -0,0 +1 @@
+from app.crud.task import task  # noqa

app/crud/base.py

@@ -0,0 +1,64 @@
+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_class 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/task.py

@@ -0,0 +1,45 @@
+from typing import List
+
+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_completed(
+        self, db: Session, *, completed: bool, skip: int = 0, limit: int = 100
+    ) -> List[Task]:
+        return (
+            db.query(self.model)
+            .filter(Task.completed == completed)
+            .offset(skip)
+            .limit(limit)
+            .all()
+        )
+    
+    def get_multi_by_priority(
+        self, db: Session, *, priority: int, skip: int = 0, limit: int = 100
+    ) -> List[Task]:
+        return (
+            db.query(self.model)
+            .filter(Task.priority == priority)
+            .offset(skip)
+            .limit(limit)
+            .all()
+        )
+    
+    def search_by_title(
+        self, db: Session, *, title: str, skip: int = 0, limit: int = 100
+    ) -> List[Task]:
+        return (
+            db.query(self.model)
+            .filter(Task.title.ilike(f"%{title}%"))
+            .offset(skip)
+            .limit(limit)
+            .all()
+        )
+
+
+task = CRUDTask(Task)

app/db/base.py

@@ -0,0 +1,4 @@
+# Import all the models here so Alembic can detect them
+from app.db.base_class import Base  # noqa
+# Import all models below
+from app.models.task import Task  # noqa

app/db/base_class.py

@@ -0,0 +1,13 @@
+from typing import Any
+from sqlalchemy.ext.declarative import declared_attr
+from sqlalchemy.orm import as_declarative
+
+@as_declarative()
+class Base:
+    id: Any
+    __name__: str
+    
+    # Generate __tablename__ automatically
+    @declared_attr
+    def __tablename__(cls) -> str:
+        return cls.__name__.lower()

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
+
+# SQLite database URL
+SQLALCHEMY_DATABASE_URL = f"sqlite:///{settings.DB_DIR}/db.sqlite"
+
+# Create SQLAlchemy engine
+engine = create_engine(
+    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 for getting DB session
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()

app/models/task.py

@@ -0,0 +1,15 @@
+from sqlalchemy import Column, Integer, String, Boolean, DateTime, Text
+from sqlalchemy.sql import func
+
+from app.db.base_class import Base
+
+
+class Task(Base):
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String(255), nullable=False, index=True)
+    description = Column(Text, nullable=True)
+    completed = Column(Boolean, default=False)
+    priority = Column(Integer, default=1)  # 1=Low, 2=Medium, 3=High
+    due_date = Column(DateTime, nullable=True)
+    created_at = Column(DateTime, default=func.now(), nullable=False)
+    updated_at = Column(DateTime, default=func.now(), onupdate=func.now(), nullable=False)

app/schemas/__init__.py

@@ -0,0 +1 @@
+from app.schemas.task import Task, TaskCreate, TaskUpdate  # noqa

app/schemas/task.py

@@ -0,0 +1,42 @@
+from datetime import datetime
+from typing import Optional
+
+from pydantic import BaseModel, Field
+
+
+# Shared properties
+class TaskBase(BaseModel):
+    title: str = Field(..., min_length=1, max_length=255, description="Task title")
+    description: Optional[str] = Field(None, description="Task description")
+    completed: Optional[bool] = Field(False, description="Task completion status")
+    priority: Optional[int] = Field(1, ge=1, le=3, description="Task priority: 1-Low, 2-Medium, 3-High")
+    due_date: Optional[datetime] = Field(None, description="Task due date")
+
+
+# Properties to receive on task creation
+class TaskCreate(TaskBase):
+    pass
+
+
+# Properties to receive on task update
+class TaskUpdate(BaseModel):
+    title: Optional[str] = Field(None, min_length=1, max_length=255, description="Task title")
+    description: Optional[str] = Field(None, description="Task description")
+    completed: Optional[bool] = Field(None, description="Task completion status")
+    priority: Optional[int] = Field(None, ge=1, le=3, description="Task priority: 1-Low, 2-Medium, 3-High")
+    due_date: Optional[datetime] = Field(None, description="Task due date")
+
+
+# Properties shared by models stored in DB
+class TaskInDBBase(TaskBase):
+    id: int
+    created_at: datetime
+    updated_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+# Properties to return to client
+class Task(TaskInDBBase):
+    pass

main.py

@@ -0,0 +1,54 @@
+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
+from app.core.exceptions import register_exception_handlers
+
+app = FastAPI(
+    title=settings.PROJECT_NAME,
+    description="Task Manager API",
+    version="0.1.0",
+    openapi_url="/openapi.json",
+    docs_url="/docs",
+    redoc_url="/redoc",
+)
+
+# Set up CORS
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# Register exception handlers
+register_exception_handlers(app)
+
+# Include routers
+app.include_router(api_router, prefix="/api/v1")
+
+# Health check endpoint
+@app.get("/health", tags=["health"])
+async def health_check():
+    from sqlalchemy import text
+    from app.db.session import engine
+    
+    # Check database connectivity
+    try:
+        with engine.connect() as connection:
+            connection.execute(text("SELECT 1"))
+        db_status = "connected"
+    except Exception as e:
+        db_status = f"error: {str(e)}"
+    
+    return {
+        "status": "healthy",
+        "database": db_status,
+        "version": "0.1.0"
+    }
+
+if __name__ == "__main__":
+    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)

migrations/README

@@ -0,0 +1 @@
+Generic single-database configuration with SQLite.

migrations/env.py

@@ -0,0 +1,80 @@
+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+
+from alembic import context
+
+# 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
+from app.db.base 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() -> 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"},
+    )
+
+    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,  # Key configuration for SQLite
+        )
+
+        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() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}

migrations/versions/78b33b9de3eb_create_tasks_table.py

@@ -0,0 +1,43 @@
+"""create tasks table
+
+Revision ID: 78b33b9de3eb
+Revises: 
+Create Date: 2023-09-01 12:00:00.000000
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '78b33b9de3eb'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # Create tasks table
+    op.create_table(
+        'task',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('title', sa.String(255), nullable=False),
+        sa.Column('description', sa.Text(), nullable=True),
+        sa.Column('completed', sa.Boolean(), default=False),
+        sa.Column('priority', sa.Integer(), default=1),
+        sa.Column('due_date', sa.DateTime(), nullable=True),
+        sa.Column('created_at', sa.DateTime(), nullable=False, server_default=sa.func.now()),
+        sa.Column('updated_at', sa.DateTime(), nullable=False, server_default=sa.func.now(), onupdate=sa.func.now()),
+        sa.PrimaryKeyConstraint('id')
+    )
+    
+    # Create index on title for faster lookups
+    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() -> None:
+    # 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')

requirements.txt

@@ -0,0 +1,12 @@
+fastapi>=0.103.1
+uvicorn>=0.23.2
+sqlalchemy>=2.0.20
+alembic>=1.12.0
+pydantic>=2.3.0
+pydantic-settings>=2.0.3
+python-dotenv>=1.0.0
+python-multipart>=0.0.6
+email-validator>=2.0.0
+ruff>=0.0.290
+pytest>=7.4.0
+httpx>=0.24.1

tests/conftest.py

@@ -0,0 +1,53 @@
+import pytest
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+from fastapi.testclient import TestClient
+
+from app.db.base import Base
+from app.db.session import get_db
+from main import app
+
+
+# Create test database
+TEST_SQLALCHEMY_DATABASE_URL = "sqlite:///./test_db.sqlite"
+
+engine = create_engine(
+    TEST_SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False}
+)
+TestingSessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+
+@pytest.fixture(scope="function")
+def db():
+    """
+    Create a fresh database for each test.
+    """
+    # Create tables
+    Base.metadata.create_all(bind=engine)
+    
+    # Create session
+    db = TestingSessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+        
+    # Drop tables after test
+    Base.metadata.drop_all(bind=engine)
+
+
+@pytest.fixture(scope="function")
+def client(db):
+    """
+    Create a test client with a test database session.
+    """
+    def override_get_db():
+        try:
+            yield db
+        finally:
+            pass
+            
+    app.dependency_overrides[get_db] = override_get_db
+    with TestClient(app) as c:
+        yield c
+    app.dependency_overrides.clear()

tests/test_health.py

@@ -0,0 +1,14 @@
+from fastapi import status
+
+
+def test_health_endpoint(client):
+    """
+    Test the health endpoint returns correct response.
+    """
+    response = client.get("/health")
+    data = response.json()
+    
+    assert response.status_code == status.HTTP_200_OK
+    assert data["status"] == "healthy"
+    assert "database" in data
+    assert "version" in data

tests/test_tasks.py

@@ -0,0 +1,152 @@
+from fastapi import status
+
+from app.models.task import Task
+
+
+def test_create_task(client, db):
+    """
+    Test creating a new task.
+    """
+    task_data = {
+        "title": "Test Task",
+        "description": "This is a test task",
+        "priority": 2
+    }
+    
+    response = client.post("/api/v1/tasks/", json=task_data)
+    data = response.json()
+    
+    assert response.status_code == status.HTTP_201_CREATED
+    assert data["title"] == task_data["title"]
+    assert data["description"] == task_data["description"]
+    assert data["priority"] == task_data["priority"]
+    assert "id" in data
+    assert "created_at" in data
+
+
+def test_read_tasks(client, db):
+    """
+    Test getting a list of tasks.
+    """
+    # Create test tasks
+    task1 = Task(
+        title="Task 1",
+        description="Description 1",
+        priority=1
+    )
+    task2 = Task(
+        title="Task 2",
+        description="Description 2",
+        priority=2
+    )
+    db.add(task1)
+    db.add(task2)
+    db.commit()
+    
+    response = client.get("/api/v1/tasks/")
+    data = response.json()
+    
+    assert response.status_code == status.HTTP_200_OK
+    assert len(data) == 2
+    assert data[0]["title"] == "Task 1"
+    assert data[1]["title"] == "Task 2"
+
+
+def test_read_task(client, db):
+    """
+    Test getting a specific task.
+    """
+    # Create test task
+    task = Task(
+        title="Test Task",
+        description="Test Description",
+        priority=2
+    )
+    db.add(task)
+    db.commit()
+    
+    response = client.get(f"/api/v1/tasks/{task.id}")
+    data = response.json()
+    
+    assert response.status_code == status.HTTP_200_OK
+    assert data["title"] == task.title
+    assert data["description"] == task.description
+    assert data["priority"] == task.priority
+
+
+def test_update_task(client, db):
+    """
+    Test updating a task.
+    """
+    # Create test task
+    task = Task(
+        title="Old Title",
+        description="Old Description",
+        priority=1
+    )
+    db.add(task)
+    db.commit()
+    
+    update_data = {
+        "title": "New Title",
+        "description": "New Description",
+        "priority": 3
+    }
+    
+    response = client.put(f"/api/v1/tasks/{task.id}", json=update_data)
+    data = response.json()
+    
+    assert response.status_code == status.HTTP_200_OK
+    assert data["title"] == update_data["title"]
+    assert data["description"] == update_data["description"]
+    assert data["priority"] == update_data["priority"]
+
+
+def test_delete_task(client, db):
+    """
+    Test deleting a task.
+    """
+    # Create test task
+    task = Task(
+        title="Task to Delete",
+        description="This task will be deleted",
+        priority=2
+    )
+    db.add(task)
+    db.commit()
+    
+    response = client.delete(f"/api/v1/tasks/{task.id}")
+    
+    assert response.status_code == status.HTTP_204_NO_CONTENT
+    
+    # Verify task was deleted
+    task_in_db = db.query(Task).filter(Task.id == task.id).first()
+    assert task_in_db is None
+
+
+def test_filter_tasks_by_completed(client, db):
+    """
+    Test filtering tasks by completed status.
+    """
+    # Create test tasks
+    task1 = Task(
+        title="Task 1",
+        description="Description 1",
+        completed=True
+    )
+    task2 = Task(
+        title="Task 2",
+        description="Description 2",
+        completed=False
+    )
+    db.add(task1)
+    db.add(task2)
+    db.commit()
+    
+    response = client.get("/api/v1/tasks/?completed=true")
+    data = response.json()
+    
+    assert response.status_code == status.HTTP_200_OK
+    assert len(data) == 1
+    assert data[0]["title"] == "Task 1"
+    assert data[0]["completed"] is True