使用 Prawn 在表中插入图像时出错

发布于 2024-12-15 01:44:50 字数 418 浏览 2 评论 0原文

我正在与 Prawn 一起生成 pdf，我必须在表格的单元格中插入图像。

我的代码是这样的：

image = "path to file"

subject = [["FORMATIVE I "," SUMATIVE ","GRAPH"],
           [formative_1,sumative, {:image => image}]
          ]
table subject

但是，我收到一条错误消息：

 prawn/table/cell.rb:127:in `make': Content type not recognized: nil (ArgumentError)

我该如何解决这个问题？非常感谢任何帮助。

干杯!

原文

I am working with Prawn to generate a pdf, I have to insert an image in a cell of a table.

My code is like this:

image = "path to file"

subject = [["FORMATIVE I "," SUMATIVE ","GRAPH"],
           [formative_1,sumative, {:image => image}]
          ]
table subject

But, I get an error which says:

 prawn/table/cell.rb:127:in `make': Content type not recognized: nil (ArgumentError)

How can I resolve this? Any help is greatly appreciated.

Cheers!

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伴我老 2024-12-22 01:44:50

在当前版本的 Prawn 0.12.0 中，无法在 Prawn::Table 中嵌入图像，但此功能似乎正在开发中，请参阅此处。目前你必须编写自己的表格，例如

data = [[{:image => "red.png"},{:text => "Red"}],
        [{:image => "blue.png"},{:text => "Blue"}]]
data.each_with_index do |row,i|
  row.each_with_index do |cell,j|
    bounding_box [x_pos,y_pos], :width => cell_width, :height => cell_height do
      image(cell[:image], ...) if cell[:image].present?
      text_box(cell[:text], ...) if cell[:text].present?
    end
    x_pos = (x_pos + cell_width)
  end
  y_pos = (y_pos - cell_height)
end

In the current version of Prawn 0.12.0 it is not possible to embed images in a Prawn::Table, but this feature seems to be under way, see here. At the moment you have to write your own table, something like

data = [[{:image => "red.png"},{:text => "Red"}],
        [{:image => "blue.png"},{:text => "Blue"}]]
data.each_with_index do |row,i|
  row.each_with_index do |cell,j|
    bounding_box [x_pos,y_pos], :width => cell_width, :height => cell_height do
      image(cell[:image], ...) if cell[:image].present?
      text_box(cell[:text], ...) if cell[:text].present?
    end
    x_pos = (x_pos + cell_width)
  end
  y_pos = (y_pos - cell_height)
end

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