Ruby on rails Carrierwave文件上载不起作用-已保存零值

我正在尝试使用carrierwave在数据库中上载/保存图像。但是我的附件在数据库上没有持久化。表中仅存储名称字段

我指的是本教程：

经过彻底的研究，我尝试了几种不同的方法来改变强参数。但没有任何效果：(

在桌子上

#<ProjectImage id: 6, name: "Image 3", attachment: nil>

看法

参数

Parameters: {"utf8"=>"✓", "authenticity_token"=>"I+Q==", "project_image"=>{"name"=>"Image 3", "attachment"=>[#<ActionDispatch::Http::UploadedFile:0x0000000592c4d0 @tempfile=#<Tempfile:C:/Users/xx/AppData/Local/Temp/RackMultipart20160412-7900-1y69rwv.jpg>, @original_filename="jet.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"project_image[attachment][]\"; filename=\"jet.jpg\"\r\nContent-Type: image/jpeg\r\n">]}, "commit"=>"Save"}

    [#<ActionDispatch::Http::UploadedFile:0x0000000592c4d0 @tempfile=#<Tempfile:C:/Users/STUART~1.MIN/AppData/Local/Temp/RackMultipart20160412-7900-1y69rwv.jpg>, @original_filename="jet.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"project_image[attachment][]\"; filename=\"jet.jpg\"\r\nContent-Type: image/jpeg\r\n">]



class ProjectImage < ActiveRecord::Base 
    mount_uploader :attachment, AttachmentUploader 
end

参数：{“utf8”=>“✓", "真实性令牌“=>”I+Q==”，“项目图像”=>{“名称”=>“图像3”，“附件”=>[#]}，“提交”=>“保存”}
[#]
类ProjectImage

AttachmentUploader类

class AttachmentUploader < CarrierWave::Uploader::Base
storage :file
  uploader = AttachmentUploader.new
def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end

    def extension_white_list
      %w(jpg jpeg gif png)
   end
 end

类AttachmentUploader 任何帮助都会令人钦佩！

---

干杯

从中删除多个：true使这项工作成功

---

干杯

从中删除多个：true使此工作成功。

Parameters: {"utf8"=>"✓", "authenticity_token"=>"I+Q==", "project_image"=>{"name"=>"Image 3", "attachment"=>[#<ActionDispatch::Http::UploadedFile:0x0000000592c4d0 @tempfile=#<Tempfile:C:/Users/xx/AppData/Local/Temp/RackMultipart20160412-7900-1y69rwv.jpg>, @original_filename="jet.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"project_image[attachment][]\"; filename=\"jet.jpg\"\r\nContent-Type: image/jpeg\r\n">]}, "commit"=>"Save"}

    [#<ActionDispatch::Http::UploadedFile:0x0000000592c4d0 @tempfile=#<Tempfile:C:/Users/STUART~1.MIN/AppData/Local/Temp/RackMultipart20160412-7900-1y69rwv.jpg>, @original_filename="jet.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"project_image[attachment][]\"; filename=\"jet.jpg\"\r\nContent-Type: image/jpeg\r\n">]



class ProjectImage < ActiveRecord::Base 
    mount_uploader :attachment, AttachmentUploader 
end

class AttachmentUploader < CarrierWave::Uploader::Base
storage :file
  uploader = AttachmentUploader.new
def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end

    def extension_white_list
      %w(jpg jpeg gif png)
   end
 end