Ruby on rails NoMethodError Rails多文件上传

我正在为我的应用程序中的一个模型进行多个文件上传，我包含了以下代码：

交付控制器.rb

# POST /delivers

def create
  @deliver = Deliver.new(params[:deliver])

  process_file_uploads(@deliver)

  if @deliver.save
    flash[:notice] = 'Task was successfully created.'
    redirect_to(@deliver)
  else
    render :action => "new" 
  end
end

protected

def process_file_uploads(deliver)
    i = 0
    while params[:attachment]['file_'+i.to_s] != "" && !params[:attachment]['file_'+i.to_s].nil?
        deliver.assets.build(:data => params[:attachment]['file_'+i.to_s])
        i += 1
    end
end

  has_many :assets, :as => :attachable, :dependent => :destroy

  validate :validate_attachments

    Max_Attachments = 5
    Max_Attachment_Size = 5.megabyte

    def validate_attachments
      errors.add_to_base("Too many attachments - maximum is #{Max_Attachments}") if assets.length > Max_Attachments
      assets.each {|a| errors.add_to_base("#{a.name} is over #{Max_Attachment_Size/1.megabyte}MB") if a.file_size > Max_Attachment_Size}
    end

class AssetsController < ApplicationController

  def show
    asset = Asset.find(params[:id])
    # do security check here
    send_file asset.data.path, :type => asset.data_content_type
  end

  def destroy
      asset = Asset.find(params[:id])
      @asset_id = asset.id.to_s
      @allowed = Deliver::Max_Attachments - asset.attachable.assets.count 
      asset.destroy
    end

end

class Asset < ActiveRecord::Base
  has_attached_file :data,

  belongs_to :attachable, :polymorphic => true

  def url(*args)
    data.url(*args)
  end

  def name
    data_file_name
  end

  def content_type
    data_content_type
  end

  def file_size
    data_file_size
  end
end

deliver.rb

# POST /delivers

def create
  @deliver = Deliver.new(params[:deliver])

  process_file_uploads(@deliver)

  if @deliver.save
    flash[:notice] = 'Task was successfully created.'
    redirect_to(@deliver)
  else
    render :action => "new" 
  end
end

protected

def process_file_uploads(deliver)
    i = 0
    while params[:attachment]['file_'+i.to_s] != "" && !params[:attachment]['file_'+i.to_s].nil?
        deliver.assets.build(:data => params[:attachment]['file_'+i.to_s])
        i += 1
    end
end

  has_many :assets, :as => :attachable, :dependent => :destroy

  validate :validate_attachments

    Max_Attachments = 5
    Max_Attachment_Size = 5.megabyte

    def validate_attachments
      errors.add_to_base("Too many attachments - maximum is #{Max_Attachments}") if assets.length > Max_Attachments
      assets.each {|a| errors.add_to_base("#{a.name} is over #{Max_Attachment_Size/1.megabyte}MB") if a.file_size > Max_Attachment_Size}
    end

class AssetsController < ApplicationController

  def show
    asset = Asset.find(params[:id])
    # do security check here
    send_file asset.data.path, :type => asset.data_content_type
  end

  def destroy
      asset = Asset.find(params[:id])
      @asset_id = asset.id.to_s
      @allowed = Deliver::Max_Attachments - asset.attachable.assets.count 
      asset.destroy
    end

end

class Asset < ActiveRecord::Base
  has_attached_file :data,

  belongs_to :attachable, :polymorphic => true

  def url(*args)
    data.url(*args)
  end

  def name
    data_file_name
  end

  def content_type
    data_content_type
  end

  def file_size
    data_file_size
  end
end

assets\u controller.rb

# POST /delivers

def create
  @deliver = Deliver.new(params[:deliver])

  process_file_uploads(@deliver)

  if @deliver.save
    flash[:notice] = 'Task was successfully created.'
    redirect_to(@deliver)
  else
    render :action => "new" 
  end
end

protected

def process_file_uploads(deliver)
    i = 0
    while params[:attachment]['file_'+i.to_s] != "" && !params[:attachment]['file_'+i.to_s].nil?
        deliver.assets.build(:data => params[:attachment]['file_'+i.to_s])
        i += 1
    end
end

  has_many :assets, :as => :attachable, :dependent => :destroy

  validate :validate_attachments

    Max_Attachments = 5
    Max_Attachment_Size = 5.megabyte

    def validate_attachments
      errors.add_to_base("Too many attachments - maximum is #{Max_Attachments}") if assets.length > Max_Attachments
      assets.each {|a| errors.add_to_base("#{a.name} is over #{Max_Attachment_Size/1.megabyte}MB") if a.file_size > Max_Attachment_Size}
    end

class AssetsController < ApplicationController

  def show
    asset = Asset.find(params[:id])
    # do security check here
    send_file asset.data.path, :type => asset.data_content_type
  end

  def destroy
      asset = Asset.find(params[:id])
      @asset_id = asset.id.to_s
      @allowed = Deliver::Max_Attachments - asset.attachable.assets.count 
      asset.destroy
    end

end

class Asset < ActiveRecord::Base
  has_attached_file :data,

  belongs_to :attachable, :polymorphic => true

  def url(*args)
    data.url(*args)
  end

  def name
    data_file_name
  end

  def content_type
    data_content_type
  end

  def file_size
    data_file_size
  end
end

new.html.erb（交付视图）

交付存储库
{:multipart=>true}）do | f |%>












挂起的附件：（MB以下每个附件的最大值）
=交付：：最大附件数%>

Show.html.erb（提供视图）

交付存储库

标题：


正文：

附件：“附件”，：collection=>@deliver.assets%>

| 
|

\u attachment.html.erb（交付视图）

引发异常

发生这种情况是因为

new.html.erb

中的表单中没有名为

attachment

的字段