How to configure using heroku environment variables from flask app-CodePudding

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Supposedly, if I begin all my environment variables with "FLASK_" and then use app.config.from_prefixed_env(), it will configure using those automatically. It has not. I am not sure what is wrong here or if I should be configuring differently with heroku. The local configuration still works fine.

I'm sorry that I'm quite bad with computers and web development. I'm a math postdoc who is trying to learn programming as a hobby.

CodePudding user response：

Make sure you have set the IS_HEROKU value in the HEROKU config variables either by the CLI or GUI method mentioned below... also make sure you run the heroku version and not the inbuilt development server for the Heroku config variables to work.

Heroku has a system for this.

Instead of storing your production (Heroku) config vars in a file, you enter them using the command line or through the web UI.

Heroku Command line method:

heroku config:set THEANSWERTOEVERYTHINGEVER=42

I like the web UI method because it's pretty (it's in the app settings).

How you'll manage your development config vars is you'll write them in YAML format in the .env file

Contents of .env file in application root (GITIGNORE THIS)

These are only for your development environment

THEANSWERTOEVERYTHINGEVER=42 ENVIRONMENT="DEVELOPMENT"

Then in your application file add

import os

You can get config variables using this syntax

os.environ.get('THEANSWERTOEVERYTHINGEVER')

Last but most important step!

Launch your server with heroku local instead of python myapp.py. This will launch Heroku's server and load your local config vars for you. Probably requires Heroku Toolbelt if you don't have it.

The link to official documantation: