ruby-on-rails - Ruby prawn-table gem : How to select last row of a table?

Question

我有一个如下所示的 Prawn table :

table info_rows do
  row(0).font_style = :bold
  row(0).align = :center
  row(0).borders = [:top, :bottom, :left, :right]
  row(1..50).borders = [:left, :right]
  self.header = true
  self.row_colors = ['EEEEEE', 'FFFFFF']
  self.column_widths = col_sizes
end

我需要在最后一行放置一个底部边框，但不确定如何检测循环内的最后一行？类似的东西(循环内的以下 if 语句显然不起作用/只是示例)...

table info_rows do
  row(0).font_style = :bold
  row(0).align = :center
  row(0).borders = [:top, :bottom, :left, :right]
  row(1..50).borders = [:left, :right]

  if row.last
    ?(?).borders = [:bottom, :left, :right]
  end

  self.header = true
  self.row_colors = ['EEEEEE', 'FFFFFF']
  self.column_widths = col_sizes
end 

任何想法都是最受欢迎的。

我正在使用 Ruby - 2.1.2

Answer 1

你可以试试这个:

table info_rows do
  row(0).font_style = :bold
  row(0).align = :center
  row(0).borders = [:top, :bottom, :left, :right]
  row(1..50).borders = [:left, :right]
  row(-1).borders = [:bottom, :left, :right]

  self.header = true
  self.row_colors = ['EEEEEE', 'FFFFFF']
  self.column_widths = col_sizes
end