Here's the `posts.py` file with CRUD endpoints for posts:

from typing import List
from fastapi import APIRouter, Depends, HTTPException
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.get("/posts", response_model=List[PostResponse])
def get_posts(db: Session = Depends(get_db)):
    posts = db.query(Post).all()
    return posts

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

@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=404, 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=404, detail="Post not found")
    for field, value in post.dict().items():
        setattr(db_post, field, value)
    db.commit()
    db.refresh(db_post)
    return db_post

@router.delete("/posts/{post_id}", response_model=PostResponse)
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=404, detail="Post not found")
    db.delete(post)
    db.commit()
    return post

This file defines the following endpoints:



Note: Make sure to import the necessary models and schemas in the `app/models.py` and `app/schemas.py` files, respectively.