Pipelinen parannuksia building blockeilla

2026-04-12 18:48:14 +03:00
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+# 3 — Coder (coder) — main.py
+
+**Malli:** `qwen-coder`
+
+## System Prompt
+
+```
+You are an expert Python developer. Write complete, production-ready code.
+
+CRITICAL RULES:
+1. Include ALL imports at the top of every file — including stdlib (from datetime import date, etc.)
+2. Import from other project files: from models import Todo, SessionLocal
+3. NEVER use relative imports (from .models) — ALWAYS absolute: from models import ...
+4. Pydantic schemas use different names than SQLAlchemy models: TodoCreate, TodoResponse (not Todo)
+5. SQLAlchemy engine: create_engine(url, connect_args={"check_same_thread": False})
+6. SessionLocal: sessionmaker(autocommit=False, autoflush=False, bind=engine)
+7. FastAPI dependencies: def get_db(): db = SessionLocal(); try: yield db; finally: db.close()
+8. Pydantic v2: use model_dump() not dict(), class Config: from_attributes = True
+9. All CRUD endpoints: POST (201), GET list, GET by id, PUT, DELETE (204)
+
+NEVER:
+- Leave out any import (EVERY type you use must be imported)
+- Use relative imports (from .models)
+- Add explanations or comments
+- Leave placeholder code or TODO comments
+- Use Flask syntax (app.run) in FastAPI projects
+- Use requirements.txt or Poetry — always use pyproject.toml with [project] format (PEP 621)
+- Use pip install — use uv (e.g. uv run uvicorn main:app --reload)
+```
+
+## Syöte
+
+```
+You are an expert Python developer. Write complete, production-ready code.
+
+CRITICAL RULES:
+1. Include ALL imports at the top of every file — including stdlib (from datetime import date, etc.)
+2. Import from other project files: from models import Todo, SessionLocal
+3. NEVER use relative imports (from .models) — ALWAYS absolute: from models import ...
+4. Pydantic schemas use different names than SQLAlchemy models: TodoCreate, TodoResponse (not Todo)
+5. SQLAlchemy engine: create_engine(url, connect_args={"check_same_thread": False})
+6. SessionLocal: sessionmaker(autocommit=False, autoflush=False, bind=engine)
+7. FastAPI dependencies: def get_db(): db = SessionLocal(); try: yield db; finally: db.close()
+8. Pydantic v2: use model_dump() not dict(), class Config: from_attributes = True
+9. All CRUD endpoints: POST (201), GET list, GET by id, PUT, DELETE (204)
+
+NEVER:
+- Leave out any import (EVERY type you use must be imported)
+- Use relative imports (from .models)
+- Add explanations or comments
+- Leave placeholder code or TODO comments
+- Use Flask syntax (app.run) in FastAPI projects
+- Use requirements.txt or Poetry — always use pyproject.toml with [project] format (PEP 621)
+- Use pip install — use uv (e.g. uv run uvicorn main:app --reload)
+
+EXAMPLE of main.py (for a different project, adapt to this one):
+```
+from fastapi import FastAPI, Depends, HTTPException
+from sqlalchemy.orm import Session
+from models import Base, engine, SessionLocal, Item
+from schemas import ItemCreate, ItemResponse
+
+Base.metadata.create_all(bind=engine)
+app = FastAPI()
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+@app.post("/items/", response_model=ItemResponse, status_code=201)
+def create_item(item: ItemCreate, db: Session = Depends(get_db)):
+    db_item = Item(**item.model_dump())
+    db.add(db_item)
+    db.commit()
+    db.refresh(db_item)
+    return db_item
+
+@app.get("/items/", response_model=list[ItemResponse])
+def list_items(db: Session = Depends(get_db)):
+    return db.query(Item).all()
+
+@app.get("/items/{item_id}", response_model=ItemResponse)
+def get_item(item_id: int, db: Session = Depends(get_db)):
+    item = db.query(Item).filter(Item.id == item_id).first()
+    if not item:
+        raise HTTPException(status_code=404, detail="Not found")
+    return item
+
+@app.put("/items/{item_id}", response_model=ItemResponse)
+def update_item(item_id: int, item: ItemCreate, db: Session = Depends(get_db)):
+    db_item = db.query(Item).filter(Item.id == item_id).first()
+    if not db_item:
+        raise HTTPException(status_code=404, detail="Not found")
+    for key, value in item.model_dump().items():
+        setattr(db_item, key, value)
+    db.commit()
+    db.refresh(db_item)
+    return db_item
+
+@app.delete("/items/{item_id}", status_code=204)
+def delete_item(item_id: int, db: Session = Depends(get_db)):
+    db_item = db.query(Item).filter(Item.id == item_id).first()
+    if not db_item:
+        raise HTTPException(status_code=404, detail="Not found")
+    db.delete(db_item)
+    db.commit()
+```
+
+Already written files in THIS project:
+--- models.py ---
+from sqlalchemy import create_engine, Column, Integer, String, DateTime, Text
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+from datetime import datetime
+
+DATABASE_URL = "sqlite:///./todo.db"
+engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+Base = declarative_base()
+
+class Task(Base):
+    __tablename__ = "tasks"
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String(100), nullable=False)
+    description = Column(Text)
+    status = Column(String(20), default="pending")
+    created_at = Column(DateTime, default=datetime.utcnow)
+
+Base.metadata.create_all(bind=engine)
+
+--- schemas.py ---
+from pydantic import BaseModel
+
+class TaskCreate(BaseModel):
+    title: str
+    description: str | None = None
+    status: str = "pending"
+
+class TaskResponse(TaskCreate):
+    id: int
+
+    class Config:
+        from_attributes = True
+
+PROJECT REQUIREMENTS (from product owner):
+### PROJECT NAME: Todo-App
+
+### GOAL:
+Create a simple task manager application for individuals to keep track of their daily tasks.
+
+### CORE FEATURES:
+1. **Add Task**: Users can add new tasks with title and description.
+2. **View Tasks**: Users can see all their tasks in a list.
+3. **Edit Task**: Users can update the details of an existing task.
+4. **Delete Task**: Users can remove tasks they no longer need.
+5. **Mark as Complete**: Users can mark tasks as completed.
+6. **Filter Tasks**: Users can filter tasks by status (e.g., pending, completed).
+7. **Search Tasks**: Users can search for specific tasks using keywords in the title or description.
+
+### DATA MODEL:
+- **Tasks**
+  - `id` (integer, primary key)
+  - `title` (string, required)
+  - `description` (text)
+  - `status` (enum: "pending", "completed")
+  - `created_at` (timestamp)
+
+### API ENDPOINTS:
+1. **GET /tasks**: Retrieve a list of all tasks.
+2. **POST /tasks**: Create a new task with title, description, and status.
+3. **PUT /tasks/{id}**: Update an existing task by ID.
+4. **DELETE /tasks/{id}**: Delete a task by ID.
+5. **GET /tasks/status/{status}**: Retrieve tasks filtered by status.
+
+### CONSTRAINTS:
+- Must use SQLite as the database.
+- No authentication required for simplicity.
+
+NOW write "main.py" for THIS project: Todo-sovellus FastAPI + SQLite, CRUD-endpointit ja testit
+Create the FastAPI app with all CRUD endpoints:
+- Import from models.py and schemas.py (use exact class names)
+- create_all(bind=engine) at module level
+- get_db dependency with yield pattern
+- POST (201), GET list, GET by id, PUT, DELETE (204)
+- Use response_model for type safety
+- Use model_dump() not dict() (Pydantic v2)
+Adapt to the project requirements. Import from already written files. Write ONLY the code, no explanations.
+```
+
+## Tulos
+
+```
+from fastapi import FastAPI, Depends, HTTPException, Query
+from sqlalchemy.orm import Session
+from models import Base, engine, SessionLocal, Task
+from schemas import TaskCreate, TaskResponse
+
+Base.metadata.create_all(bind=engine)
+app = FastAPI()
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+@app.post("/tasks/", response_model=TaskResponse, status_code=201)
+def create_task(task: TaskCreate, db: Session = Depends(get_db)):
+    db_task = Task(**task.model_dump())
+    db.add(db_task)
+    db.commit()
+    db.refresh(db_task)
+    return db_task
+
+@app.get("/tasks/", response_model=list[TaskResponse])
+def list_tasks(status: str | None = Query(None), db: Session = Depends(get_db)):
+    if status:
+        tasks = db.query(Task).filter(Task.status == status).all()
+    else:
+        tasks = db.query(Task).all()
+    return tasks
+
+@app.get("/tasks/{task_id}", response_model=TaskResponse)
+def get_task(task_id: int, db: Session = Depends(get_db)):
+    task = db.query(Task).filter(Task.id == task_id).first()
+    if not task:
+        raise HTTPException(status_code=404, detail="Not found")
+    return task
+
+@app.put("/tasks/{task_id}", response_model=TaskResponse)
+def update_task(task_id: int, task: TaskCreate, db: Session = Depends(get_db)):
+    db_task = db.query(Task).filter(Task.id == task_id).first()
+    if not db_task:
+        raise HTTPException(status_code=404, detail="Not found")
+    for key, value in task.model_dump().items():
+        setattr(db_task, key, value)
+    db.commit()
+    db.refresh(db_task)
+    return db_task
+
+@app.delete("/tasks/{task_id}", status_code=204)
+def delete_task(task_id: int, db: Session = Depends(get_db)):
+    db_task = db.query(Task).filter(Task.id == task_id).first()
+    if not db_task:
+        raise HTTPException(status_code=404, detail="Not found")
+    db.delete(db_task)
+    db.commit()
+```