Heroku with Rails
Learn how to make Heroku, Rails, and Dotenv Vault work together. This tutorial assumes you have already created a .env file and synced it.
You can find a complete example repo here.
Set up Rails with Heroku
Set up your Rails app to work with Heroku.
Example shows using environment variable example
// Add 'dotenv-vault-rails' to Gemfile
gem 'dotenv-vault-rails'
Run bundle install.
$ bundle install
Require dotenv-vault
Require dotenv-vault.
Require it as early as possible in your Rails application. For a Rails application require dotenv-vault/load in application.rb
// config/application.rb
require 'dotenv-vault/load'
Run dotenv-vault build
On your terminal at root of your project run npx dotenv-vault build to build your encrypted .env.vault file.
$ npx dotenv-vault build
Get DOTENV_KEY
Run npx dotenv-vault keys production.
$ npx dotenv-vault keys production
remote: Listing .env.vault decryption keys... done
dotenv://:key_1234@dotenv.org/vault/.env.vault?environment=production
Set DOTENV_KEY
Visit your Heroku Project’s Environment Variables under settings of your heroku application
Set DOTENV_KEY to the value returned in step 4.
Commit and push
That’s it!
Commit those changes safely to code and deploy to Heroku.
When the build runs, it will recognize the DOTENV_KEY, decrypt the .env.vault file, and load the production environment variables to ENV. If a DOTENV_KEY is not set (like during development on your local machine) it will fall back to regular dotenv.