问题
I have a flask application that uses different configuration files for development and production environments. The relevant piece of code is this:
app.config.from_object('config.dev')
app.config.from_envvar('SPOTPIX_SETTINGS', silent=True)
When i'm developing in my local server, the configurations are taken from config.dev, but when i push the code to heroku, i would like to set SPOTPIX_SETTINGS environment variable to point to the 'config.prod' file. This can be done in heroku command line client like so:
heroku config:set SPOTPIX_SETTINGS=
However, I have no clue what should i write to the right of the equals sign, as i can't assign the absolute path of the production configuration file to the environment variable, because this is not the same in heroku as it is in my development machine.
Thank you very much!
回答1:
You should use a env variable to look if you are in dev or heroku.
heroku config:set IS_HEROKU=True
Then in your file
import os
is_prod = os.environ.get('IS_HEROKU', None)
if is_prod:
#here goes all your heroku config
回答2:
I don't know anything about your project but 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 the web UI.
Command line method:
heroku config:set THEANSWERTOEVERYTHINGEVER=42
I like the web UI method because it's pretty (it's in app settings).
How you'll manage your development config vars is you'll write them YAML style 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 mysweetapp.py. This will launch Heorku's server and load your local config vars for you. Probably requires Heroku Toolbelt if you don't have it.
It's all here. https://devcenter.heroku.com/articles/getting-started-with-python#define-config-vars
来源：https://stackoverflow.com/questions/28323666/setting-environment-variables-in-heroku-for-flask-app