Rails使用praw将数组渲染为pdf

Question

我需要将我的@manufacturers数组渲染为pdf，但只能通过点击视图中的某个链接来实现... 现在我有这样的代码

def index
    @manufacturers = Manufacturer.all


    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @manufacturers }
      format.pdf { render :layout => false }
    end
  end

我在网上看到了很多例子，但我没有找到明确的实际例子......在我的数组@manufacturers的a4 pdf表中做多么简单？

Answer 1

除了prawn之外，还可以使用prawnto rails插件来帮助将PDF呈现为模板。

有关插件的信息，请参见https://github.com/prior/prawnto，有关如何使用，请参见http://railscasts.com/episodes/153-pdfs-with-prawn。

Answer 2

[注意：报告宝石目前仅在letter尺寸的纸张上生成，A4的贴片将受到欢迎！]

您可以使用Report gem，它使用Prawn生成PDF，还可以使用XLSX和CSV。

# a fake Manufacturer class - you probably have an ActiveRecord model
Manufacturer = Struct.new(:name, :gsa)

require 'report'
class ManufacturerReport < Report
  table 'Manufacturers' do
    head do
      row 'Manufacturer report'
    end
    body do
      rows :manufacturers
      column 'Name', :name
      column 'GSA?', :gsa
    end
  end
  # you would want this so that you can pass in an array
  # attr_reader :manufacturers
  # def initialize(manufacturers)
  #   @manufacturers = manufacturers
  # end
  def manufacturers
    [
      Manufacturer.new('Ford', true),
      Manufacturer.new('Fischer', false),
      Manufacturer.new('Tesla', nil),
    ]
  end
end

当您致电report.pdf.path时，会在tmp目录中生成PDF：

report = ManufacturerReport.new
puts report.pdf.path #=> /tmp/185051406_Report__Pdf.pdf
puts report.xlsx.path #=> /tmp/185050541_Report__Xlsx.xlsx

您可以在控制器中执行以下操作：

@manufacturers = Manufacturer.all
respond_to do |format|
  format.html # index.html.erb
  format.json { render json: @manufacturers }
  format.pdf do
    report = ManufacturerReport.new(@manufacturers) # using the commented-out code
    send_file report.pdf.path, :type => 'application/pdf', :disposition => 'attachment', :filename => 'ManufacturersReport.pdf'
    # tmp files are periodically cleaned up by the operating system, but if you want to be extra clean you can call
    # report.cleanup
    # but this may remove the tmp files before apache/nginx/etc. finishes delivering the file
  end
end

最终结果：

PDF

XLSX

请注意，XLSX会自动为您添加自动过滤器。