why does heroku not list the same gems as i have l

问题:

I'm still pretty new to heroku and git hub and rails.

My app works locally, but fails on Heroku. The lines of failure indicate it's because it's missing the plugin I installed locally.

This is a basic question that I can't seem to find. How do I ensure that or update the list of gems on heroku to match my local setup?

I have the gem in my gemfile, and have pushed to git. When I go in heroku console and type gem list it's not there.

Thanks

EDIT. Solved. Can't answer my own question for 24 hours. I had :group => development listed next to the gem. I don't even remember putting that there. Removed it, obviously, and problem solved.

回答1:

Make sure you run bundle install before pushing to heroku. This generates your Gemfile.lock file that ensures the gems are the same on heroku and locally.

回答2:

Because Heroku adds some gems to your Gemfile. This is how Heroku works. Take a Rack app. Heroku will add thin to it because that's how they want to run your Rack app. Also they don't install your test and dev gems. Just production.