使用wicked_pdf创建pdf并传递给carrierwave进行上传

Question

我目前有一个使用wicked_pdf和carrierwave功能的rails应用程序(4.2.1)。用户当前单击将家庭评估视图呈现为PDF的按钮，然后将PDF下载到其计算机并导航到评估表，然后提交PDF并将其成功上载到AWS。

这一切都很好，但是我想要做的是“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carrierwave，以便使用carrierwave/fog上传到AWS。我现在有一个视图，其中包含一个控制器的链接，该控制器调用FamilyAssesment.upload_assessment方法。

我一直在尝试不同的方法，但似乎就是不能确切地理解我需要做些什么才能让它工作。

视图上的按钮

<%= 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

看起来您可以将PDF保存为临时文件，然后上载该临时文件。

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

这个答案很大一部分来自Getting PDF from WickedPDF for attachment via Carrierwave