将Paperclip用于嵌套模型

我正在尝试使用回形针将 Files 附加到 Log ，使用具有简单形式的嵌套表单 . 当文件是模型的属性时，我能够附加单个文件，但我需要能够将多个文件关联到日志（一对多），这就是为什么我现在有两个模型 . 我'm getting the following error but I'我不知道我错过了什么 .

找不到[＃，@ original_filename =“1314e40ac73ab769790aea881730e12f.jpg”，@ content_type =“image / jpeg”，@ headers =“Content-Disposition：form-data; name = \”log [documents_attributes] [0] [附件] [] \“; filename = \”1314e40ac73ab769790aea881730e12f.jpg \“\ r \ nConContent-Type：image / jpeg \ r \ n”> ,, @ original_filename =“fsdfsdafsad-large.png”，@ content_type =“image / png“，@ headers =”Content-Disposition：form-data; name = \“log [documents_attributes] [0] [attachment] [] \”; filename = \“fsdfsdafsad-large.png \”\ r \ nContent -Type：image / png \ r \ n“>]

Document 型号：

class Document < ApplicationRecord
  default_scope { order(created_at: :desc) }

  belongs_to :log

  has_attached_file :attachment
  validates :log, presence: true
  validates_attachment_content_type :attachment, :content_type => ["image/jpg", "image/jpeg", "image/png", "image/gif"]
end

Log 型号：

class Log < ApplicationRecord
  default_scope { order(created_at: :desc) }

  belongs_to :user
  belongs_to :server
  has_many :documents, dependent: :destroy
  accepts_nested_attributes_for :documents

  do_not_validate_attachment_file_type :documents
end

Log 控制器：

# GET /logs/new
  def new
    @log = Log.new
    @log.documents.build
  end

  # POST /logs
  # POST /logs.json
  def create
    @log = Log.new(log_params)

    if params[:documents_attributes]
      params[:documents_attributes].each do |doc|
        @log.documents.create(attachment: doc)
      end
    end

    #binding.pry
    respond_to do |format|
      if @log.save
        binding.pry
        format.html { redirect_to log_path(@log), notice: 'Log was successfully created.' }
        format.json { render :show, status: :created, location: @log }
      else
        format.html { render :new }
        format.json { render json: @log.errors, status: :unprocessable_entity }
      end
    end
  end

# Never trust parameters from the scary internet, only allow the white list through.
def log_params
  params.require(:log).permit(:user_id, documents_attributes: [:log_id, attachment: []])
end

Log 表单视图

<%= simple_form_for @log, html: { class: 'form-horizontal', enctype: 'multipart/form-data', local: true, multipart: true }   do |f| %>
  <%= f.simple_fields_for :documents, @log.documents do |ff| %>
    <%= ff.input :attachment, as: :file, input_html: { multiple: true } %>
  <% end %>
<% end %>

Update: 错误是在 Log 控制器的 create 操作中从 @log = Log.new(log_params) 触发的 .