if i remove rows on localhost:3000 via jquery, those removed rows aren't removed when generating the CSV. Why?

model.rb

def generate_csv
      url = "http://localhost:3000"
      doc = Nokogiri::HTML(open(url, :allow_redirections => :safe))
      csv = CSV.open("#{Rails.root}/public/collections-output.csv", 'w',{:col_sep => ","})
      csv << ['HEADERS HERE']
      doc.xpath('//table/tbody/tr').each do |row|
          tarray = [] 
          row.xpath('td').each do |cell|
              tarray << cell.text
          end
          csv << tarray
      end

      csv.close
  end