from typing import List
from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session

from app.db import get_db
from app.models import Post
from app.schemas import PostCreate, PostResponse

router = APIRouter()

@router.post("/posts", response_model=PostResponse, status_code=status.HTTP_201_CREATED)
def create_post(post: PostCreate, db: Session = Depends(get_db)):
    new_post = Post(**post.dict())
    db.add(new_post)
    db.commit()
    db.refresh(new_post)
    return new_post

@router.get("/posts", response_model=List[PostResponse])
def get_all_posts(db: Session = Depends(get_db)):
    posts = db.query(Post).all()
    return posts

@router.get("/posts/{post_id}", response_model=PostResponse)
def get_post(post_id: int, db: Session = Depends(get_db)):
    post = db.query(Post).filter(Post.id == post_id).first()
    if not post:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Post not found")
    return post

@router.put("/posts/{post_id}", response_model=PostResponse)
def update_post(post_id: int, post: PostCreate, db: Session = Depends(get_db)):
    db_post = db.query(Post).filter(Post.id == post_id).first()
    if not db_post:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Post not found")
    update_data = post.dict(exclude_unset=True)
    for key, value in update_data.items():
        setattr(db_post, key, value)
    db.commit()
    db.refresh(db_post)
    return db_post

@router.delete("/posts/{post_id}", status_code=status.HTTP_204_NO_CONTENT)
def delete_post(post_id: int, db: Session = Depends(get_db)):
    post = db.query(Post).filter(Post.id == post_id).first()
    if not post:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Post not found")
    db.delete(post)
    db.commit()
    return

This file defines the following endpoints:


The endpoints use SQLAlchemy models (`Post`) and Pydantic schemas (`PostCreate`, `PostResponse`) for data validation and serialization. The `get_db` dependency function from `app.db` is used to get a database session.


Note: You'll need to define the `Post` model in `app/models.py` and the `PostCreate` and `PostResponse` schemas in `app/schemas.py` for this code to work properly.