NM Pennypacker questions

NM Pennypacker answers

• Change multiple columns with one single migration change
• Running rails server with ssl? (puma)
• Update attributes before_save callback not saving extra attributes
• What does "migration" mean in Programming?
• nested resources in devise
• Change name of the 'current_user' helper in Devise
• What would you need to do to Rails to make spec files live alongside the code they describe?
• What is the best way to run a long task on Heroku with Ruby On Rails?
• npm cannot find SDK version from global.json
• No such file or directory - identify with Mini Magick