Question

我有一个应用程序，您可以存储订单/发票。我正在构建一个简单的功能，您可以为我的客户复制发票。我在Order.rb模型中编写了这个方法：

获取发票，复制相关的lineitems，将新的OrderID添加到其中......并对相关图像执行相同操作。

def self.duplicate_it(invoice)
  new_invoice = invoice.dup
  new_invoice.save

  invoice.lineitems.each do |l|
    new_lineitem = l.dup
    new_lineitem.order_id = new_invoice.id
    new_lineitem.save
  end

  invoice.images.each do |i|
    new_image = i.dup
    new_image.order_id = new_invoice.id
    new_image.save
  end

  return new_invoice
end

不幸的是，你不能只是.dup图像，因为我在S3上存储图像，因此存在所有这些关联到期的东西。有没有办法使用image_url重新生成图像？

运行时遇到的错误如下。这告诉我并非所有相关的图像信息都被正确复制。

Showing /Users/bruceackerman/Dropbox/printavo/app/views/orders/_image-display.erb where line #3 raised:

undefined method `content_type' for nil:NilClass
Extracted source (around line #3):

1:  <% @order.images.each do |image| %>
2:      <% if image.image && image.image.file %>
3:          <% if image.image.file.content_type == "application/pdf" %>
4:              <%= link_to image_tag("/images/app/pdf.jpg", 
5:                      :class => 'invoice-image'),
6:                  image.image_url,

Answer 1

我认为您可以执行以下操作

invoice.images.each do |i|
  new_image = new_invoice.images.new({ order_id: new_invoice.id })
  new_image.image.download!(i.image_url)
  new_image.store_image!
  new_image.save!
end

Answer 2

这实际上是我为订单上的每个lineitem做的：

def self.duplicate_it(invoice)
    new_invoice = invoice.dup :include => {:lineitems => :images} do |original, kopy|
      kopy.image = original.image if kopy.is_a?(Image)
    end

    new_invoice.save!
    return new_invoice
end

Answer 3

这有点晚了但是这是我的解决方案。 .download!

我遇到了太多问题

if @record.duplicable?
      new_record = @record.dup
      if new_record.save
        @record.uploads.each do |upload|
          new_image = new_record.uploads.new({ uploadable_id: new_record.id })
          new_image.filename = Rails.root.join('public'+upload.filename_url).open
          new_image.save!
        end
end

这是我的upload.rb

class Upload < ActiveRecord::Base
  belongs_to :uploadable, polymorphic: true
  mount_uploader :filename, ImageUploader
end

希望它有所帮助！

使用Carrierwave复制带有相关图像的记录

3 个答案: