使用wicked_pdf创建pdf并传递给carrierwave进行上传

gem 'wicked_pdf'
gem 'carrierwave'

def generate_pdf
  pdf = WickedPdf.new.pdf_from_string(
    render_to_string(template: 'your_controller/pdf_template.html.erb')
  )
  save_path = Rails.root.join('tmp', 'pdfs', 'your_pdf_filename.pdf')
  File.open(save_path, 'wb') do |file|
    file << pdf
  end
end

def upload_pdf
  pdf_file = File.open(Rails.root.join('tmp', 'pdfs', 'your_pdf_filename.pdf'))
  YourUploader.upload(pdf_file)
end

CarrierWave.configure do |config|
  config.storage = :file
  config.root = Rails.root.join('public')
  config.store_dir = 'uploads'
end

class YourUploader < CarrierWave::Uploader::Base
  storage :file

  def store_dir
    'uploads/pdf'
  end

  def filename
    "#{secure_token}.pdf" if original_filename.present?
  end

  private

  def secure_token
    var = :"@#{mounted_as}_secure_token"
    model.instance_variable_get(var) || model.instance_variable_set(var, SecureRandom.uuid)
  end
end