Issues in APIRouter.__init__() got an unexpected keyword argument 'prefix' using FastApI

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Example Code

from ..import models, schemas
from fastapi import FastAPI, Response, status, HTTPException, Depends, APIRouter 
from sqlalchemy.orm import Session
from .. database import get_db
from typing import List

router = APIRouter(
    prefix="/posts",
    tags=['Posts'])


@router.get("/", response_model=List[schemas.Post])
def get_posts(db: Session = Depends(get_db)):

    posts = db.query(models.Post).all()
    # cursor.execute(""" SELECT * FROM posts """)
    # posts = cursor.fetchall()
    return posts

@router.post("/", status_code= status.HTTP_201_CREATED, response_model=schemas.Post)
def create_posts(post: schemas.PostCreate, db: Session = Depends(get_db)):
    # cursor.execute(""" INSERT INTO posts (title, content, published) VALUES(%s , %s, %s) RETURNING *""",
    # (post.title, post.content, post.published))

    # new_post = cursor.fetchone()
    # conn.commit()
    # print(**post.dict())
    new_post= models.Post(**post.dict())
    db.add(new_post)
    db.commit()
    db.refresh(new_post)
    return new_post

@router.get("/{id}", response_model=schemas.Post)
def get_post(id: int, response: Response, db: Session = Depends(get_db)):
    # cursor.execute(""" SELECT * FROM posts WHERE id = %s """ ,(str(id)))
    # post= cursor.fetchone()
    post = db.query(models.Post).filter(models.Post.id ==id).first()
    print(post)
    if not post:
        raise HTTPException(status_code = status.HTTP_404_NOT_FOUND, 
                                        detail = f"post with id : {id} was not found")
    return post


@router.delete("/{id}", status_code= status.HTTP_204_NO_CONTENT)
def delete_post(id: int, db: Session = Depends(get_db)):
    # cursor.execute (""" DELETE FROM posts WHERE id = %s RETURNING * """, (str(id)))
    # deleted_post= cursor.fetchone()
    # conn.commit()

    post_query = db.query(models.Post).filter(models.Post.id ==id)
    if post_query.first == None:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail = f"post with {id} does not exit")

    post_query.delete(synchronize_session=False)
    db.commit()

    return Response(status_code=status.HTTP_204_NO_CONTENT)


@router.put("/{id}", response_model=schemas.Post)
def update_post(id: int, updated_post: schemas.PostCreate, db: Session = Depends(get_db)):
    # cursor.execute("""UPDATE posts SET title = %s, content=%s, published=%s WHERE id = %s RETURNING* """, (post.title, post.content, post.published, str(id)),)
    # updated_post = cursor.fetchone()
    # conn.commit()

    post_query = db.query(models.Post).filter(models.Post.id ==id)

    post = post_query.first()
    if post == None:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail = f"post with {id} does not exit")
    
    post_query.update(updated_post.dict(), synchronize_session=False)
    db.commit()
    return post_query.first()

Description

File “C:\Users\OneDrive\Desktop\API_Development\fastapi.\app\main.py”, line 13, in <module> from app.routers import post, user File “C:\Users\OneDrive\Desktop\API_Development\fastapi.\app\routers\post.py”, line 7, in <module> router = APIRouter( TypeError: APIRouter.init() got an unexpected keyword argument ‘prefix’

Operating System

Windows

Operating System Details

No response

FastAPI Version

0.52.0

Python Version

Python 3.10.1

Additional Context

Please help

[rafsaf]

Please look at release notes. Your version is kind of 2 years behind. It’s 2/3 of whole fastapi lifetime (I’m on phone, this is estimated).

I’m aware of few security issues and breaking changes 😉

For me, upgrade is required.

But, if it’s not possible, your only chance is to search through source code of your version and find a solution, probably you can add prefix in app.include_router.

[adhamsalama]

@Nidit2512 it’s “FastAPI”, not “FASTAPI”.