使用wicked_pdf创建pdf并传递到载波进行上传

Question

我目前有一个使用wicked_pdf和载波功能的rails应用程序(4.2.1)。用户当前单击一个按钮，该按钮将家庭评估视图呈现为PDF，然后用户将PDF下载到他们的计算机并导航到评估表单，然后提交PDF并将其成功上传到AWS。

这一切都很好，但我想做的是"简化"这个过程。当用户点击一个按钮时，PDF将被创建并传递给载波，然后使用载波/雾将其上传到AWS。我现在有一个视图，它链接到一个名为familyassessment的控制器。upload_assessment方法。

我一直在尝试不同的方法，但似乎就是不明白我到底需要做什么才能让它工作。

按钮显示

<%= link_to "Upload", family_assessment_pdf_upload_url(id: "#{f.object.case.id}"), class: 'button radius default tiny pdf-button' %>

family_assessments_controller.rb

class FamilyAssessmentsController < ApplicationController
  def family_assessment_pdf_upload
    c = Case.find(params[:id])
    family_assessment = c.family_assessment
    assessment = c.assessments.where(title: 'Families First Assessment').first
    FamilyAssessment.upload_assessment(assessment, family_assessment)
    #If work is done and url saved to assessment.assessment do some redirect action here 
  end
end

family_assessment.rb

class FamilyAssessment < ActiveRecord::Base
  def self.upload_assessment(assessment, family_assessment)
    family_assessment = family_assessment
    assessment = assessment 
    #I think this is how I would create the PDF in preparation for hand off to carrierwave
    pdf = WickedPdf.new.pdf_from_string(
      render_to_string(:pdf => "family_assessment",:template => 'family_assessments/family_assessment.pdf.erb', :locals => {:family_assessment => family_assessment})
    )
    #Pass pdf to carrierwave and save url in assessment.assessment
  end
end

Answer 1

看起来你可以将PDF保存为临时文件，然后上传该临时文件。

class FamilyAssessment < ActiveRecord::Base
  def self.upload_assessment(assessment, family_assessment)
    family_assessment = family_assessment
    assessment = assessment 
    #I think this is how I would create the PDF in preparation for hand off to carrierwave
    pdf = WickedPdf.new.pdf_from_string(
      render_to_string(:pdf => "family_assessment",:template => 'family_assessments/family_assessment.pdf.erb', :locals => {:family_assessment => family_assessment})
    )
    #Pass pdf to carrierwave and save url in assessment.assessment
    # Write it to tempfile
    tempfile = Tempfile.new("#{Rails.root}/tmp/assessment_#{self.id}.pdf")
    tempfile.binmode
    tempfile.write pdf_file
    tempfile.close
    # Attach that tempfile to the invoice
    unless pdf_file.blank?
      self.uploads.clear
      self.uploads.create(fileinfo: File.open(tempfile.path), job_id: self.job.id)
      tempfile.unlink
    end
  end
end

这个答案大部分来自于通过Carrierwave从WickedPDF获取附件