How to use PyMongo with Flask Blueprints?

Question

What is the correct way of picking up mongo object inside Blueprints?

Here is how I have my parent login.py:

app.config.from_object(\         


        

Answer 1

One of the issues with the approach of performing an import in the blueprint as was suggest by Emanuel Ey, turns out that it causes a circular import. After much playing, it turns out that the only way (I could find) was to create a separate file called database.py that connects to the database and then I can import this connection to by blueprint as follows:

child.py

from database import mongo
courses = Blueprint('courses', __name__)

and my database.py

from flask.ext.pymongo import PyMongo
mongo = PyMongo() 

and the app, login.py but has to initialize the database

from database import mongo
app = Flask(__name__)
app.config.from_object('config')
mongo.init_app(app) # initialize here!

from child import child 
from child import2 child2

app.register_blueprint(child.child)
app.register_blueprint(child2.child2)