Context scopes.

acetakwas_context.py

from flask import Flask, current_app, render_template_string
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
db = SQLAlchemy(app)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///'


class Example(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String)

    def __repr__(self):
        return self.name

@app.before_first_request
def begin():
    db.create_all()

@app.route('/')
def home():
    print("I have an app context called {}".format(current_app.name))
    db.session.add(Example(name='Alice'))
    db.session.commit()
    do_something()
    return render_template_string("{{ examples|join(', ')}}", examples=Example.query.all())

def do_something():
    print("I still have context ({})".format(current_app.name))
    print(current_app.name)
    db.session.add(Example(name='Bob'))
    db.session.commit()


if __name__ == '__main__':
    app.run(debug=True, port=8882)