Rails 4 assets trouble? Here you go.

Rails 4 Assets Fix

Are your images disappearing when you deploy your Rails 4 app to Heroku? Mine were, but I think I figured it out. I don't claim to be any kind of Ruby on Rails expert, but after a lot of trial and error I found that these steps got my static assets uploading and displaying.

1. In your Gemfile:
gem 'rails_12factor', group: :production

Be sure to run 'bundle install' in your terminal after adding this (or any) gem.

2. In config/environments/production.rb, change these properties to 'true':
config.serve_static_assets = true
config.assets.compile = true

3. Run this line in your terminal:
RAILS_ENV=production bin/rake assets:precompile

4. Before deploying, make sure you run this command:
rake assets:precompile

After these four simple steps, you should be laughing all the way to Total Internet Fame. Good luck!