复制带有关联和回形针附件的导轨对象 [英] Duplicate a rails object with associations and paperclip attachments

问题描述

我有一个具有多个关联的对象.其中一些关联对象具有存储在 S3 中的回形针附件.如果我复制对象和关联，它可以正常工作，但附件不会重复.

I have an object with several associations. Some of these associated objects have paperclip-attachments stored at S3. If I duplicate the object and the associations it works fine but the attachments are not duplicated.

此处无需获取图像即可工作:

This here works without getting the images:

copy_salon = @salon.dup 
copy_salon.about_us_versions = @salon.about_us_versions.collect{|about_us| about_us.dup}

我尝试像这样获取图片链接:

I tried to get the image link like this:

copy_salon = @salon.dup 
copy_salon.about_us_versions = @salon.about_us_versions.collect{|about_us| 
                                                                  about_us_dup = about_us.dup
                                                                  if about_us.about_us_image then about_us_dup.about_us_image = about_us.about_us_image end
                                                                  if about_us.team_image then about_us_dup.team_image = about_us.team_image end
                                                                  about_us_dup
                                                                }

但后来我收到错误消息无法将 nil 转换为字符串"，可能是因为并非所有图像都已设置.

But then I am getting the error 'can't convert nil into String', probably because not all images are set.

推荐答案

明白了，不优雅但有效.我曾希望 dup 能用所有关联和附件复制我的对象.难道没有任何宝石吗?

Got it, not elegant but working. I had hoped dup would duplicate my object with ALL associations and attachments. Isn't there any gem for that?

copy_salon = @salon.dup 
copy_salon.about_us_versions = @salon.about_us_versions.collect{|about_us| 
                                                                  about_us_dup = about_us.dup
                                                                  unless about_us.about_us_image.url == "/about_us_images/original/missing.png" then about_us_dup.about_us_image = about_us.about_us_image end
                                                                  unless about_us.team_image.url == "/team_images/original/missing.png" then about_us_dup.team_image = about_us.team_image end
                                                                  about_us_dup
                                                                }

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