Created
September 20, 2016 17:47
Context scopes.
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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) |
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