Rails

RBEnv

List current ruby version: rbenv versions

Set local/directory version of ruby:rbenv local <VERSION>

After installing a gem that adds new binaries (new commands):rbenv rehash

Ruby Gems

Updating gem system:gem update --system --no-document

Bundler

Install gems from current bundle:bundle install or: bundle install --without production

Run an executable that comes with a gem in your bundle:bundle exec <GEM COMMAND>

Update one gem: bundle update --conservative <GEM NAME>

Rails

Create a new Rails project:rails new <APP NAME>

Create Rails database:rake db:create

Update Rails database:rake db:migrateor:rake db:migrate RAILS_ENV=production

Run Rails server:rails server

Rails console:rails console --sandbox

Rails console bypass model validation:XXXXXX.update(admin: true) XXXXXX.save(:validate => false)

Capistrano

Deploy:bundle exec cap TASKHERE deploy

Heroku

Create app:heroku create

Push app:git push heroku master

Auth Heroku: heroku auth:login

Open app:heroku open

Run console:heroku run rails console

Migrate database:heroku run rake db:migrate

If you want to run sqlite locally and pg on heroku, your gemfile needs to look like this:

group :development do
   gem 'sqlite3'
end

group :production do
   gem 'pg'
end

You may need to add the Ruby version to your gemfile as well:ruby '1.9.3'

To get your assets to properly compile on heroku, change your production.rb file to say true here instead of false:config.assets.compile = true

Deploy to heroku through git.

Deploy with branch name other than master or main: git push heroku my-branch:main

Dokku

Push app:git push dokku master

In your production group, you'll likely want these two gems:

gem 'pg' # postgres
gem 'rails_12factor' # for logging

SSH into server to run dokku commands. Use dokku --help for list of commands.

Use git to deploy Heroku app.