Ruby on Rails

I'm looking for a way to split a group of data (ex. Sales Orders)

Currently split (In Progress, On Hold, Shipped, Cancelled)

I would like to split Shipped into two

Shipped (before 1 year)

Archive Shipped (after 1 year)

I believe I should add the following line to  sales_orders.html.erb

<%= sidebar_link_to(:status, 'archive_shipped') {"Archive"} %>

and add the following lines in the sales_order.rb

when "recent_shipped"

active.shipped.shipped_date_after(1.year.ago)

when "achive_shipped"

active.shipped.shipped_date_before(1.year.ago)

But I'm not sure where to place this in the file, since I didn't have all the phases (in progress, on hold, shipped, and cancelled) labeled out like :Phase 

I didn't write this application, so I'm trying to make changes that have been requested. 

Please see sales_order.rb below

class SalesOrder < ActiveRecord::Base

  include Filterable

  include Tenancy

  enum status: [ :in_progress, :on_hold, :cancelled, :shipped ]

  has_many :line_items, dependent: :destroy

  has_many :films

  

  accepts_nested_attributes_for :line_items, allow_destroy: true

  

  validates :code, presence: true, 

                   uniqueness: { case_sensitive: false, 

                                 scope: :tenant_code }

  validates :ship_date, presence: true, if: Proc.new { |o| o.shipped? }

  validate :ship_date_after_release?

  validates :release_date, presence: true

  validates :due_date, presence: true

  include PgSearch

  pg_search_scope :search, against: [:code, :customer, :ship_to, :note], 

    :using => { tsearch: { prefix: true } }

  scope :order_by, ->(col, dir) { order("#{col} #{dir}") }

  scope :status, ->(status) { where(status: statuses[status]) }

  scope :due_date_equals, ->(date) { where(due_date: date) }

  scope :type, ->(prefix) { where('code ILIKE ?', prefix) }

  scope :ship_date_before, ->(date) { where("ship_date <= ?", date) } 

  scope :ship_date_after, ->(date) { where("ship_date >= ?", date) } 

  scope :text_search, ->(query) { reorder('').search(query) }

  scope :code_like, ->(code) { where('code ILIKE ?', code.gsub('*', '%')) }

  scope :status_not, ->(status) { where("status <> ?", statuses[status]) }

  def lead_days

    (ship_date - release_date).to_i

  end

  def total_quantity

    line_items.total_quantity

  end

  def assigned_film_count(phase = nil)

    assigned = phase ? films.phase(phase) : films

    assigned.total_order_fill_count

  end

  def assigned_film_percentage

    return 0 if total_quantity == 0

    100*assigned_film_count/total_quantity

  end

  def total_custom_area

    line_items.total_area

  end

  def total_assigned_area

    films.map{ |f| f.area }.sum

  end

  def past_due?

    Date.current > due_date

  end

  def shipped_late?

    ship_date ? ship_date > due_date : false

  end

  def utilization

    100*total_custom_area/total_assigned_area if total_custom_area && total_assigned_area && total_assigned_area > 0

  end

  def self.avg_utilization

    100*total_custom_area/total_assigned_area if total_custom_area && total_assigned_area && total_assigned_area > 0

  end

  def self.total_custom_area

    line_items.total_area

  end

  def self.total_assigned_area

    films.map{ |f| f.area }.sum

  end

  def self.line_items

    LineItem.where(sales_order_id: all.map(&:id))

  end

  def self.films

    Film.where(sales_order_id: all.map(&:id))

  end

  def self.to_csv(options = {})

    CSV.generate(options) do |csv|

      csv << %w(SO# Customer Released Due Ship-to Status Shipped Note)

      all.each do |o|

        csv << [o.code, o.customer, o.release_date, o.due_date, o.ship_to, o.status, o.ship_date, o.note]

      end

    end

  end

  private

  def ship_date_after_release?

    if ship_date.present? && ship_date < release_date

      errors.add(:base, "Must be shipped after release")

    end

  end

end