ruby-on-rails - "stack level too deep"处理嵌套形式的载波图像版本时

Question

这是一个奇怪的问题，不幸的是，它有很多潜在的来源。我正在使用 Carrierwave 和 Cocoon Gems 来帮助嵌套文件上传。我在 uploader 中执行的任何类型的版本处理都会导致堆栈级别太深错误。如果我删除处理，它会正常保存嵌套图像。我尝试进行了很多故障排除，并将范围缩小到了这一点；例如，如果我仅删除版本处理，则它可以正常工作。如果我删除除版本处理之外的所有内容，它会引发相同的错误。有很多潜在的来源，所以这里有一些代码:

父表单(截断)

<%= semantic_form_for [@object, @discussion], multipart: true , input_html: {class: "form-horizontal"} do |f| %>
     <div id="pictures">
      <%= f.semantic_fields_for :pictures do |p| %>
        <%= render 'picture_fields', :f => p %>
      <% end %>
      <div class="links">
        <%= link_to_add_association f, :pictures do %>
          <button type="button" class="btn btn-success btn-sm">Add Image</button>
        <% end %>
      </div>
    </div>
 <% end %>

嵌套形式

<div class="nested-fields">
 <div class="row">
  <div class="col-md-10">
    <%= f.input :pic, label: false %>
    <%= f.input :pic_cache, as: :hidden %>    
  </div>
  <div class="col-md-2 pull-right">
    <%= link_to_remove_association f do %>
     <button type="button" class="btn btn-danger btn-sm">REMOVE</button>
    <% end %>
   </div>
  </div>
 </div>

上传者

        # encoding: utf-8

class ImageUploader < CarrierWave::Uploader::Base

  # Include RMagick or MiniMagick support:
  include CarrierWave::RMagick
  # include CarrierWave::MiniMagick

  # Include the Sprockets helpers for Rails 3.1+ asset pipeline compatibility:
  # include Sprockets::Helpers::RailsHelper
  # include Sprockets::Helpers::IsolatedHelper

  # Choose what kind of storage to use for this uploader:
  # storage :file
  # storage :fog

  # Override the directory where uploaded files will be stored.
  # This is a sensible default for uploaders that are meant to be mounted:
  def store_dir
    if Rails.env.test?
      "uploads/test/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
    else
      "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
    end
  end

  #custom method to access local files as full paths
  def local_path_or_remote_url
    if CarrierWave::Uploader::Base.storage.to_s == CarrierWave::Uploader::Base.storage_engines[:file]
      path
    else
      url
    end
  end

  # Process files as they are uploaded:
  # process :scale => [200, 300]
  #
  # def scale(width, height)
  #   # do something
  # end

  # Create different versions of your uploaded files:
  process :resize_to_fit => [400, 400]

  version :thumb do
    process :resize_to_fill => [72, 72]
  end


  # Add a white list of extensions which are allowed to be uploaded.
  # For images you might use something like this:
  def extension_white_list
     %w(jpg jpeg gif png)
  end

  # Override the filename of the uploaded files:
  # Avoid using model.id or version_name here, see uploader/store.rb for details.
  def filename
    "pic#{File.extname(original_filename).downcase}" if original_filename
  end

end

我的上传者使用基本相同的代码，没有任何问题。仅当嵌套时，该版本控制代码才会出现问题。我知道这可能有很多潜在的来源。有什么想法吗？

Answer 1

这对我有用。

gem 'rmagick', :require => 'RMagick'