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 gem 来帮助上传嵌套文件。我在上传器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。我已经尝试进行很多故障排除并将其范围缩小到这一点；例如，如果我只删除版本处理，那么它可以正常工作。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而没有问题。此版本控制代码仅存在嵌套问题。我知道这可能有很多潜在的来源。有任何想法吗？