虾表方法不起作用

Question

我一直在用prawn创建pdf文档。我正在使用虾0.8.4。我已经在app目录中的pdf文件夹中创建了一个类，如此。

class SchoolPdf < Prawn::Document
  def initialize(school)
    super(top_margin: 70)
    @school = school
    school_name
    line_items

  end

  def school_name
    text "School: #{@school.school_name}", size: 30, style: :bold
  end

   def line_items
    move_down 20
    table [[1,2],[3,4]]
   end
end

这是我在控制器中的show动作的代码

def show
  @school = School.find(params[:id])
  respond_to do |format|
  format.html
  format.pdf  do
    pdf = SchoolPdf.new(@school)

    send_data pdf.render,filename: "#{@school.school_name}_report.pdf",
                         type: "application/pdf",
                         disposition: "inline"
  end

我收到错误undefined method 'table'可能出错？

Answer 1

升级到Prawn版本0.12.0，它应该可以正常工作。