Separate SQLAlchemy models by file in Flask [duplicate]

Question

Many examples for Flask apps that I have seen have the models stored directly in the main app file (http://pythonhosted.org/Flask-SQLAlchemy/quickstart.html, http://maximebf.com/blog/2012/10/building-websites-in-python-with-flask/). Other ones (http://flask.pocoo.org/docs/patterns/sqlalchemy/) have a "models.py" file in which models are placed.

How can I have my Flask app import models from separate files, e.x. "User.py"? When I try creating a User.py file with these contents:

from app import db  class User(db.Model):     [...] 

I get the following error:

File "/Users/stackoverflow/myapp/models/User.py", line 1, in <module> from app import db ImportError: No module named app 

When I insert from models import User in my module file.

Answer 1

This answer was extremely helpful: https://stackoverflow.com/a/9695045/353878.

I needed to not initialize the db right away.