user_state.rb

class User
  include AASM

  aasm do
    state :newone, initial: true
    state :activated
    state :blocked
    state :deleted

    event :activate do
      transitions from: :newone, to: :activated
    end

    event :block do
      transitions from: :activated, to: :blocked
    end

    event :unblock do
      transitions from: :blocked, to: :activated
    end

    event :delete do
      transitions from: [:newone, :activated, :blocked], to: :deleted
    end
  end
end