Tyring to set up modelview with Flask-Admin causes ImportError

Question

I am trying to add a User model view to Flask-Admin. However, I get ImportError: cannot import name db. Why is this happening and how do I fix it?

Answer 1

Your code has the line from app.models import User in __init__.py. The problem is that app.models has from . import db. This is a circular import: __init__ tries to import User, which tries to import db, which isn't defined until after __init__ tries to import User. To solve this, move your local app imports below the definitions of all the global extension stuff.

Currently, your code looks something like:

from flask_sqlalchemy import SQLAlchemy
from app.models import User

db = SQLAlchemy()

You need to change it to:

from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()

from app.models import User