I came across this behavior and was wondering if anyone else had seen it. I have a workaround so it's not a show-stopper.
I created a new app on Heroku with a Cedar stack. When demonstrating multiple environments I added the following config var:
heroku config:add RACK_ENV=staging --app appname
I visually verified that the environment var was set, then put the following route in my simple Sinatra example:
get '/?' do
ENV['RACK_ENV']
end
When I tested locally on my laptop, I received the expected development
.
When I pushed to He开发者_运维百科roku and hit the same route on herokuapp.com I got development
instead of staging
.
I switched the web server from Thin to Unicorn through the Procfile and pushed the changes back up to Heroku.
Now when I hit the route, I get the expected staging
.
Has anyone else seen this? My workaround on another project where I was running Thin was to key the environment off of the New Relic app name. (I didn't switch to Unicorn because I need New Relic to work and currently Cedar and New Relic and Unicorn work together).
I had the same problem with sinatra and thin on the cedar stack using heroku's example sinatra app. The RACK_ENV refuses to be set to anything but development. (Heroku seems to think that it's RACK_ENV is set, since running 'heroku config' displays the environment you set, however in the app it's always development).
The same app on the bamboo stack had no problems.
EDIT: I submitted a ticket to heroku about this and got a really quick response which fixed the bug for me:
QUOTE: It looks like there's a small bug in our default Procfile if you're using thin. Can you create a Procfile with the following in it?
web: bundle exec thin start -R config.ru -e $RACK_ENV -p $PORT
You can also set both your RACK_ENV and RAILS_ENV to staging using the Heroku gem ... then it works as expected. I think it may be a problem with Heroku.
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