Rails 4 - 如何建立PDF文件的链接(name.PDF)？

Question

我正在生成PDF文件,我的链接如下所示:

<%= link_to 'Invoice', display_invoice_path(invoice.id), :format => :pdf %>

当我点击它时,它将我带到/ display_invoice/123456789(这是一个HTML版本).

在控制器中,操作如下:

def display_invoice
    if params[:invoice_number]
      @invoice = ...

      respond_to do |format|
        format.html
        format.pdf do
          #render pdf: '123',                  # file name
          render pdf: params[:invoice_number],
                 layout: 'layouts/application.pdf.erb'#,  # layout used
                 #show_as_html: params[:debug].present?    # allow debuging
        end
      end
    end
  end

并在路线:

  get '/display_invoice/:invoice_number', to: 'invoices#display_invoice', :as => 'display_invoice'

点击链接后,我想要在网址/display_invoice/INVOICE_NUMBER.pdf中显示 - 目前只有/ display_invoice/INVOICE_NUMBER.

如何用".pdf"后缀打开它？

谢谢.

Answer 1

您需要添加pdf mime类型.

将以下行添加到文件config/initializers/mime_types.rb:

Mime::Type.register "application/pdf", :pdf

有关详细信息,请参阅http://guides.rubyonrails.org/action_controller_overview.html#restful-downloads.

编辑:

格式需要是路径助手的一部分:

display_invoice_path(invoice.id, :format => :pdf)