Rails 37 Style Backend Database

State as Records, Not Booleans

Instead of boolean flags, create records to represent state:

# Bad - boolean flag
class Card < ApplicationRecord
  # closed: boolean

  def close
    update!(closed: true)
  end
end

# Good - state record with attribution
class Card < ApplicationRecord
  has_one :closure, dependent: :destroy

  def closed?
    closure.present?
  end

  def close(by:)
    create_closure!(creator: by)
  end

  def reopen
    closure.destroy!
  end
end

class Closure < ApplicationRecord
  belongs_to :card
  belongs_to :creator, class_name: "User"

  # Timestamps tell you when it was closed
  # creator tells you who closed it
end

Why records over booleans:

• Know WHO made the change
• Know WHEN it happened
• Query history easily
• Add metadata (reason, notes)

Database-Backed Infrastructure

No Redis - everything uses the database:

Solid Queue (Jobs)

# Gemfile
gem "solid_queue"

# config/database.yml