Rails 4 Carrierwave图像未更新

Question

我是Stackoverflow的新手，正在学习Ruby on Rails，使用Carrierwave进行图片上传。我正在创建一个通讯录，并在一次更新多个图像时遇到问题。在新的联系表单中，我设置了它，以便用户可以添加多个逗号分隔的联系人和一个复选框（如果用户想要添加图像）。我遇到的问题是当用户有多个新联系人并想要添加图像时图像没有上传，其他情况都正常。这是我的控制器，非常感谢任何帮助。

class ContactsController < ApplicationController

  before_action :require_user
  before_action :set_contact, only: [:show, :edit, :destroy, :update]

  def new
    @contact = Contact.new
  end

  def create
    @group = Group.find(session[:group_id])
    @contacts = []
    redirect_path = nil
    render_path = nil

    if ",".in? contact_params[:name]
       #create multiple contact objects in @contacts array
      @strings = contact_params[:name].split(/,/)
      @strings.count.times do
        @contacts << Contact.new
      end
      @contacts.each_with_index do |contact, index|
        contact.name = @strings[index].strip
        contact.user = current_user
        contact.group_id = @group.id
        if contact.save
          flash[:success] = "Saved"
          redirect_path = group_path(@group)
        else
          flash[:danger] = "Failed to save"
          redirect_path = edit_multiple_contacts_path(@contacts)
        end
      end
      if params[:cbox] == "true"
         #need to go to edit multiple
        redirect_path = nil
        render_path = 'edit_multiple'
      else
       #do nothing
      end
    else
      @contact = Contact.new(contact_params)
      @contact.user = current_user
      @contact.group_id = @group.id
      if @contact.save
         #flash[:success] = "Saved"
        redirect_path = group_path(@group)
      else
        flash[:danger] = "Failed to save"
      end

      if params[:cbox] == "true"
        redirect_path = edit_contact_path(@contact)
      else
        #do nothing
      end
    end

    if redirect_path.nil?
      render render_path
    else
      redirect_to(redirect_path)
    end
  end # end of create

  def show
  end

  def edit
  end

  def destroy
    @group = Group.find(session[:group_id])
    @contact.destroy
    flash[:success] = "This contact has been removed"
    redirect_to group_path(@group)
  end

  def update
    @group = Group.find(session[:group_id])
    if @contact.update(contact_params)
      flash[:success] = "#{@contact.name} has been updated"
      redirect_to group_path(@group)
    else
      render 'edit'
    end
  end

  def edit_multiple
  end

  def update_multiple
    @group = Group.find(session[:group_id])
    @contacts = Contact.update(params[:contacts].keys,   params[:contacts].values)
    @contacts.reject! { |u| u.errors.empty? }
    if @contacts.empty?
      redirect_to group_path(@group)
    else
      render 'edit_multiple'
    end
  end #end update_multiple


private

  def set_contact
    @contact = Contact.find(params[:id])
  end

  def contact_params
    params.require(:contact).permit(:name, :image, :contacts)
  end

end