Ruby on Rails：Prawn Gem生成PDF，但PDF无法显示

Question

我已经将Ruby on Rails(Version5.2.1)与RubyMine IDE一起用于一个项目，并且处于一个开发阶段，在这个阶段我想创建一些基于PDF的报告。为此，我抓取了Prawn(2.2.2版）宝石。我设置了一个从页面下载PDF的按钮：

<%= button_to "Download", action: :download_report %>

它被路由到相应的控制器：

get 'pages#download_report' => 'pages#report_page'
post 'pages#download_report', action: :download_report, controller: 'pages'

def download_report
    Prawn::Document.generate("hello.pdf") do
        text "Hello World!"
    end
    send_data("hello.pdf", filename: "hello.pdf", type: 'application/pdf')
end

Answer 1

使用send_file更改send_data:

 def download_report
    Prawn::Document.generate("hello.pdf") do
      text "Hello World!"
    end
    send_file "hello.pdf",type: 'application/pdf'
end