class RenameColumnInSalaries < ActiveRecord::Migration
  def self.up
    change_column :salaries, :position, :string
    rename_column :salaries, :position, :position_id
    Handling.history_for_period_zp
    Handling.add_salaries
    periods = Period.find(:all, :conditions => "month < DATE('2022-01-01')")
    for per in periods do
      per.closed = true
      per.save
    end
end
  
  def self.down
  end
end