ruby-on-rails - 将 Ruby on Rails 应用程序中的数据导入 Excel 电子表格的最佳方法是什么？

Question

我知道你在想什么，只需将数据下载为 CSV 文件并导入 Excel。

不幸的是，我们需要用户从 Rails 应用程序中选择一些数据，然后轻松（即尽可能少的用户干预 - 理想情况下按下一个按钮）将其导出，并在包含各种公式的现有 Excel 电子表格中打开它和宏等，将应用于数据。

我理想的解决方案将涉及 Rails 端的大部分繁重工作，因为这就是我的技能所在，但我想可能会有某种 Excel Web 集成的东西可能会有所帮助。

无论如何，我可以就解决这个问题的好方法提出一些建议吗？

Answer 1

axlsx 可能是深度 excel 工作最完整的实现。 https://github.com/randym/axlsx

下面是一个构建 microsoft skydrive 模板的示例：

require 'axlsx'

Axlsx::Package.new do |p|
  p.workbook do |wb|
    styles = wb.styles
    header = styles.add_style :bg_color => "DD", :sz => 16, :b => true, :alignment => {:horizontal => :center}
    tbl_header = styles.add_style :b => true, :alignment => { :horizontal => :center }
    ind_header = styles.add_style :bg_color => "FFDFDEDF", :b => true, :alignment => {:indent => 1}
    col_header  = styles.add_style :bg_color => "FFDFDEDF", :b => true, :alignment => { :horizontal => :center }
    label       = styles.add_style :alignment => { :indent => 1 }
    money       = styles.add_style :num_fmt => 5
    t_label       = styles.add_style :b => true, :bg_color => "FFDFDEDF"
    t_money = styles.add_style :b => true, :num_fmt => 5, :bg_color => "FFDFDEDF"

    wb.add_worksheet do |sheet|
      sheet.add_row
      sheet.add_row [nil, "College Budget"], :style => [nil, header]
      sheet.add_row
      sheet.add_row [nil, "What's coming in this month.", nil, nil, "How am I doing"], :style => tbl_header
      sheet.add_row [nil, "Item", "Amount", nil, "Item", "Amount"], :style => [nil, ind_header, col_header, nil, ind_header, col_header]
      sheet.add_row [nil, "Estimated monthly net income", 500, nil, "Monthly income", "=C9"], :style => [nil, label, money, nil, label, money]
      sheet.add_row [nil, "Financial aid", 100, nil, "Monthly expenses", "=C27"], :style =>  [nil, label, money, nil, label, money]
      sheet.add_row [nil, "Allowance from mom & dad", 20000, nil, "Semester expenses", "=F19"], :style =>  [nil, label, money, nil, label, money]
      sheet.add_row [nil, "Total", "=SUM(C6:C8)", nil, "Difference", "=F6 - SUM(F7:F8)"], :style => [nil, t_label, t_money, nil, t_label, t_money]
      sheet.add_row
      sheet.add_row [nil, "What's going out this month.", nil, nil, "Semester Costs"], :style => tbl_header
      sheet.add_row [nil, "Item", "Amount", nil, "Item", "Amount"], :style => [nil, ind_header, col_header, nil, ind_header, col_header]
      sheet.add_row [nil, "Rent", 650, nil, "Tuition", 200], :style =>  [nil, label, money, nil, label, money]
      sheet.add_row [nil, "Utilities", 120, nil, "Lab fees", 50], :style =>  [nil, label, money, nil, label, money]
      sheet.add_row [nil, "Cell phone", 100, nil, "Other fees", 10], :style =>  [nil, label, money, nil, label, money]
      sheet.add_row [nil, "Groceries", 75, nil, "Books", 150], :style =>  [nil, label, money, nil, label, money]
      sheet.add_row [nil, "Auto expenses", 0, nil, "Deposits", 0], :style =>  [nil, label, money, nil, label, money]
      sheet.add_row [nil, "Student loans", 0, nil, "Transportation", 30], :style =>  [nil, label, money, nil, label, money]
      sheet.add_row [nil, "Other loans", 350, nil, "Total", "=SUM(F13:F18)"], :style => [nil, label, money, nil, t_label, t_money]
      sheet.add_row [nil, "Credit cards", 450], :style => [nil, label, money]
      sheet.add_row [nil, "Insurance", 0], :style => [nil, label, money]
      sheet.add_row [nil, "Laundry", 10], :style => [nil, label, money]
      sheet.add_row [nil, "Haircuts", 0], :style => [nil, label, money]
      sheet.add_row [nil, "Medical expenses", 0], :style => [nil, label, money]
      sheet.add_row [nil, "Entertainment", 500], :style => [nil, label, money]
      sheet.add_row [nil, "Miscellaneous", 0], :style => [nil, label, money]
      sheet.add_row [nil, "Total", "=SUM(C13:C26)"], :style => [nil, t_label, t_money]
      sheet.add_chart(Axlsx::Pie3DChart) do |chart|
        chart.title = sheet["B11"]
        chart.add_series :data => sheet["C13:C26"], :labels => sheet["B13:B26"]
        chart.start_at 7, 2
        chart.end_at 12, 15
      end
      sheet.add_chart(Axlsx::Bar3DChart, :barDir => :col) do |chart|
        chart.title = sheet["E11"]
        chart.add_series :labels => sheet["E13:E18"], :data => sheet["F13:F18"]
        chart.start_at 7, 16
        chart.end_at 12, 31
      end
      sheet.merged_cells.concat ["B4:C4","E4:F4","B11:C11","E11:F11","B2:F2"]
      sheet.column_widths 2, nil, nil, 2, nil, nil, 2
    end
 end
 p.use_shared_strings = true
 p.serialize 'axlsx.xlsx'
end

Answer 2

出口部分至少得到了相当好的覆盖——这里有几个候选宝石：

• 电子表格
• 袋鼠

我怀疑（希望！）一旦你有你的 XLS 形式的数据，其余的应该在客户端进行管道连接。

查看 Excel 的 Web 查询工具有什么价值吗？如果用户可以定义他们的选择标准以便不经常更改，那么自定义页面（可能只是提供一个表格）可以将数据直接放入他们的 Excel 会话中。只是一个想法...

Answer 3

Ryan Bates 刚刚在 railscasts.com 上发布了关于 导出 CSV 和 Excel的免费短截屏视频