states

task.rb

  state_machine :status, :initial => :new do

    event :accept do
      transition :new => :accepted
    end

    event :reject do
      transition :new => :rejected
    end

    event :done do
      transition :accepted => :done
    end

    event :close do
      transition [:new, :accepted, :rejected, :done] => :closed
    end
    
    event :hide do
      transition [:rejected, :done] => :hidden
    end

  end