heroku-python / flask-heroku

[DEPRECATED] Heroku environment variable configurations for Flask.

Flask-Heroku

This is a simple Flask extension that sets configuration defaults for Heroku-esque environment variables.

This is far from conclusive. Send a pull request to add a new service!

Usage

Usage is pretty simple:

from flask import Flask
from flask.ext.heroku import Heroku

app = Flask(__name__)
heroku = Heroku(app)

Configuration is already set up:

>>> app.config['SQLALCHEMY_DATABASE_URI']
postgres://...

Alternatively, Flask's application factory pattern is supported:

heroku = Heroku()
# Then, later...
heroku.init_app(app)

Install

Installation is simple:

$ pip install flask-heroku

flask-heroku's Issues

MongoDB URI with multiple nodes (host:port separated by a comma) raises `invalid literal for int()` error

A MongoDB URI can specify multiple, comma separated host:port URL parts like this:

mongodb://username:password@host1:123,host2:456/database

A URL in this form will result in an error:

ValueError: invalid literal for int() with base 10

I have a solution which uses pymongo.uri_parser.parse_uri (if installed) to parse the the MongoDB URL, selecting the first node (or, host:port) to extract the port, hostname and database.

Secret Key?

Update PyPI

Please upload the current version to PyPI, so we can all benefit from MONGOLAB_URI :)

issue with flask-migrate

This explains the issue. I had the same problem as the user. Seems they were using flask-heroku, and the environment variable does not get picked up by alembic.

http://stackoverflow.com/questions/21432553/alembic-flask-migrate-migration-on-heroku-runs-but-does-not-create-tables

PyPI out of date

This package is out of date on PyPI. The version retrieved with pip install flask-heroku does not have the init_app() method.

debug=1 if not on Heroku?

I'm not sure if this is out of the scope of this project, but it would be awesome if it detected if it was running on Heroku and added app.debug=1 if not.

Setting fallback values for local development

What would be the proper way to set fallback values in case DATABASE_URL (for example) is not set on a development environment?

Right now the proper way seems to be:

from os import environ
heroku = Heroku(app)
if 'DATABASE_URL' not in environ:
    app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:////tmp/test.db'

Is there any way to get this fallback behavior from flask-heroku?

Importing from flask.ext?

Shouldn't it import from flask.ext.heroku instead of flask_heroku? And what about init_app?

Do not set BROKER_TRANSPORT

I'm not entirely sure the purpose of this setting, but it seems in (at least) Celery 3.1 it should not be configured, or it should be configured with something else (I think just 'redis'). I've never ever had to configure this myself, so it's probably better to just remove this configuration.

Setting it to None before Flask-Heroku inits resolves the issue, as it prevents it from setting it.

Mailgun + Flask-Mail

I just assumed (incorrectly) that by setting up the Heroku Mailgun extension, and seeing that it was listed in this project, that everything would just work.

But then I realized I still needed to do:

app.config['MAIL_SERVER'] = app.config['SMTP_SERVER']
app.config['MAIL_USERNAME'] = app.config['SMTP_LOGIN']
app.config['MAIL_PASSWORD'] = app.config['SMTP_PASSWORD']

http://packages.python.org/Flask-Mail/

perhaps you should add that?

Easier start when using together with Flask-PyMongo

The Flask app configuration values for MongoDB are different between flask-heroku and Flask-PyMongo, so I have to remap them, like this:

app = Flask(__name__)
heroku = Heroku(app)
app.config.update(
    MONGO_USERNAME=app.config['MONGODB_USER'],
    MONGO_PASSWORD=app.config['MONGODB_PASSWORD'],
    MONGO_HOST=app.config['MONGODB_HOST'],
    MONGO_PORT=app.config['MONGODB_PORT'],
    MONGO_DBNAME=app.config['MONGODB_DB'],
)
mongo = PyMongo(app)

Is there anything that can be done to make this easier, ideally to require just the following?

app = Flask(__name__)
heroku = Heroku(app)
mongo = PyMongo(app)

Thanks

Support REDIS_URL

Flask-Redis appears to utilize this setting. It should work with both RedisCloud and RedisToGo as both seem semi-supported.