/Python/Could not locate a bind configured on mapper mapped class class->tablename, SQL expression or this Session.

Could not locate a bind configured on mapper mapped class class->tablename, SQL expression or this Session.

# When working with FastAPI
# database.py

from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base

SQLALCHEMY_DATABASE_URL = "mysql://user:pwd@host:port/db"
engine = create_engine(SQLALCHEMY_DATABASE_URL)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()


# main.py

from fastapi import FastAPI, Depends
from sqlalchemy.orm import Session

from database import SessionLocal
import schema

def get_db():
    # The important thing here is to create an instance of SessionLocal
    # from database.py not Session from sqlalchemy
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()
        
@app.get("/user", response_model=schema.User)
def get_user(user_id: int, db: Session=Depends(get_db))
	user = crud.get_user(db, user_id=user_id)
    return user

Similar codes

1 vote160 views2 answers
While loop in python for do you want to continue
Python
3 votes166 views3 answers
Python create dictionary from csv
Python
1 vote178 views1 answer
Xlabel seaborn
Python
0 vote185 views1 answer
Python qt always on top
Python
3 votes167 views1 answer
For each digit in number python
Python
-1 vote157 views1 answer
Find the area of a circle in python
Python
1 vote169 views2 answers
Python url encoding
Python
1 vote173 views2 answers
How to print out text in python
Python
0 vote158 views1 answer
Django add to database
Python
0 vote183 views1 answer
Take first n row of dictionary python
Python