Implement Task Management API with FastAPI

- Create complete task management system with CRUD operations
- Add Task model with status, priority, timestamps
- Set up SQLite database with SQLAlchemy and Alembic migrations
- Implement RESTful API endpoints for task operations
- Configure CORS middleware and API documentation
- Add health check endpoint and root information response
- Include proper project structure and comprehensive README

README.md

@@ -1,3 +1,71 @@
-# FastAPI Application
+# Task Management API
 
-This is a FastAPI application bootstrapped by BackendIM, the AI-powered backend generation platform.
+A simple and efficient task management tool built with FastAPI and SQLite.
+
+## Features
+
+- Create, read, update, and delete tasks
+- Task prioritization (Low, Medium, High)
+- Task status tracking (Pending, In Progress, Completed)
+- RESTful API with automatic documentation
+- SQLite database with Alembic migrations
+
+## API Endpoints
+
+- `GET /` - Root endpoint with API information
+- `GET /health` - Health check endpoint
+- `GET /docs` - Interactive API documentation (Swagger UI)
+- `GET /redoc` - Alternative API documentation (ReDoc)
+- `POST /tasks` - Create a new task
+- `GET /tasks` - List all tasks (with pagination)
+- `GET /tasks/{task_id}` - Get a specific task
+- `PUT /tasks/{task_id}` - Update a task
+- `DELETE /tasks/{task_id}` - Delete a task
+
+## Quick Start
+
+1. Install dependencies:
+   ```bash
+   pip install -r requirements.txt
+   ```
+
+2. Run the application:
+   ```bash
+   uvicorn main:app --reload
+   ```
+
+3. Access the API documentation at `http://localhost:8000/docs`
+
+## Project Structure
+
+```
+.
+├── main.py                 # FastAPI application entry point
+├── requirements.txt        # Python dependencies
+├── alembic.ini            # Alembic configuration
+├── pyproject.toml         # Ruff configuration
+├── app/
+│   ├── db/
+│   │   ├── base.py        # SQLAlchemy base
+│   │   └── session.py     # Database session management
+│   ├── models/
+│   │   └── task.py        # Task database model
+│   ├── routers/
+│   │   └── tasks.py       # Task API endpoints
+│   └── schemas/
+│       └── task.py        # Pydantic schemas
+├── alembic/
+│   ├── versions/          # Migration files
+│   └── env.py            # Alembic environment
+└── storage/
+    └── db/               # SQLite database location
+
+```
+
+## Database
+
+This application uses SQLite for data storage. The database is automatically created when the application starts. Database migrations are handled by Alembic.
+
+## Environment Variables
+
+Currently, the application uses default configurations and doesn't require any environment variables to run.

alembic.ini

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+[alembic]
+script_location = alembic
+prepend_sys_path = .
+version_path_separator = os
+sqlalchemy.url = sqlite:////app/storage/db/db.sqlite
+
+[post_write_hooks]
+
+[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

alembic/env.py

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+from logging.config import fileConfig
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+from alembic import context
+import sys
+import os
+
+sys.path.append(os.path.dirname(os.path.dirname(__file__)))
+
+from app.db.base import Base
+from app.models.task import Task
+
+config = context.config
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+target_metadata = Base.metadata
+
+
+def run_migrations_offline() -> None:
+    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:
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

alembic/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"}

alembic/versions/001_initial_migration.py

@@ -0,0 +1,34 @@
+"""Initial migration
+
+Revision ID: 001
+Revises: 
+Create Date: 2025-07-01 00:00:00.000000
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision = '001'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table('tasks',
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.Column('title', sa.String(length=255), nullable=False),
+    sa.Column('description', sa.Text(), nullable=True),
+    sa.Column('status', sa.Enum('PENDING', 'IN_PROGRESS', 'COMPLETED', name='taskstatus'), nullable=False),
+    sa.Column('priority', sa.Enum('LOW', 'MEDIUM', 'HIGH', name='taskpriority'), nullable=False),
+    sa.Column('created_at', sa.DateTime(), nullable=False),
+    sa.Column('updated_at', sa.DateTime(), nullable=False),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_tasks_id'), 'tasks', ['id'], unique=False)
+
+
+def downgrade() -> None:
+    op.drop_index(op.f('ix_tasks_id'), table_name='tasks')
+    op.drop_table('tasks')

app/db/base.py

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+from sqlalchemy.ext.declarative import declarative_base
+
+Base = declarative_base()

app/db/session.py

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+from pathlib import Path
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+from app.db.base import Base
+
+DB_DIR = Path("/app") / "storage" / "db"
+DB_DIR.mkdir(parents=True, exist_ok=True)
+
+SQLALCHEMY_DATABASE_URL = f"sqlite:///{DB_DIR}/db.sqlite"
+
+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()
+
+
+def create_tables():
+    Base.metadata.create_all(bind=engine)

app/models/task.py

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+from datetime import datetime
+from sqlalchemy import Column, Integer, String, Text, DateTime, Enum
+from app.db.base import Base
+import enum
+
+
+class TaskStatus(str, enum.Enum):
+    PENDING = "pending"
+    IN_PROGRESS = "in_progress"
+    COMPLETED = "completed"
+
+
+class TaskPriority(str, enum.Enum):
+    LOW = "low"
+    MEDIUM = "medium"
+    HIGH = "high"
+
+
+class Task(Base):
+    __tablename__ = "tasks"
+
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String(255), nullable=False)
+    description = Column(Text, nullable=True)
+    status = Column(Enum(TaskStatus), default=TaskStatus.PENDING, nullable=False)
+    priority = Column(Enum(TaskPriority), default=TaskPriority.MEDIUM, nullable=False)
+    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False)

app/routers/tasks.py

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+from typing import List
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
+from app.db.session import get_db
+from app.models.task import Task as TaskModel
+from app.schemas.task import Task, TaskCreate, TaskUpdate
+
+router = APIRouter()
+
+
+@router.post("/", response_model=Task)
+def create_task(task: TaskCreate, db: Session = Depends(get_db)):
+    db_task = TaskModel(**task.dict())
+    db.add(db_task)
+    db.commit()
+    db.refresh(db_task)
+    return db_task
+
+
+@router.get("/", response_model=List[Task])
+def read_tasks(skip: int = 0, limit: int = 100, db: Session = Depends(get_db)):
+    tasks = db.query(TaskModel).offset(skip).limit(limit).all()
+    return tasks
+
+
+@router.get("/{task_id}", response_model=Task)
+def read_task(task_id: int, db: Session = Depends(get_db)):
+    task = db.query(TaskModel).filter(TaskModel.id == task_id).first()
+    if task is None:
+        raise HTTPException(status_code=404, detail="Task not found")
+    return task
+
+
+@router.put("/{task_id}", response_model=Task)
+def update_task(task_id: int, task_update: TaskUpdate, db: Session = Depends(get_db)):
+    task = db.query(TaskModel).filter(TaskModel.id == task_id).first()
+    if task is None:
+        raise HTTPException(status_code=404, detail="Task not found")
+    
+    update_data = task_update.dict(exclude_unset=True)
+    for field, value in update_data.items():
+        setattr(task, field, value)
+    
+    db.commit()
+    db.refresh(task)
+    return task
+
+
+@router.delete("/{task_id}")
+def delete_task(task_id: int, db: Session = Depends(get_db)):
+    task = db.query(TaskModel).filter(TaskModel.id == task_id).first()
+    if task is None:
+        raise HTTPException(status_code=404, detail="Task not found")
+    
+    db.delete(task)
+    db.commit()
+    return {"message": "Task deleted successfully"}

app/schemas/task.py

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+from datetime import datetime
+from typing import Optional
+from pydantic import BaseModel
+from app.models.task import TaskStatus, TaskPriority
+
+
+class TaskBase(BaseModel):
+    title: str
+    description: Optional[str] = None
+    status: TaskStatus = TaskStatus.PENDING
+    priority: TaskPriority = TaskPriority.MEDIUM
+
+
+class TaskCreate(TaskBase):
+    pass
+
+
+class TaskUpdate(BaseModel):
+    title: Optional[str] = None
+    description: Optional[str] = None
+    status: Optional[TaskStatus] = None
+    priority: Optional[TaskPriority] = None
+
+
+class Task(TaskBase):
+    id: int
+    created_at: datetime
+    updated_at: datetime
+
+    class Config:
+        from_attributes = True

main.py

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+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from app.db.session import create_tables
+from app.routers import tasks
+
+app = FastAPI(
+    title="Task Management API",
+    description="A simple task management tool built with FastAPI",
+    version="1.0.0",
+    openapi_url="/openapi.json"
+)
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+create_tables()
+
+app.include_router(tasks.router, prefix="/tasks", tags=["tasks"])
+
+
+@app.get("/")
+def root():
+    return {
+        "title": "Task Management API",
+        "description": "A simple task management tool built with FastAPI",
+        "documentation": "/docs",
+        "health_check": "/health"
+    }
+
+
+@app.get("/health")
+def health_check():
+    return {"status": "healthy", "service": "Task Management API"}

pyproject.toml

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+[tool.ruff]
+target-version = "py38"
+line-length = 88
+select = ["E", "W", "F", "I"]
+ignore = []
+
+[tool.ruff.isort]
+known-first-party = ["app"]

requirements.txt

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+fastapi==0.104.1
+uvicorn==0.24.0
+sqlalchemy==2.0.23
+alembic==1.12.1
+pydantic==2.5.0
+ruff==0.1.6