Rails-将文件上传到资产文件夹

Question

我想将图像直接从This上传到资产文件夹，因此我创建了一个控制器和一个带有表单的自定义页面。我在tmp文件夹中检索上载器文件，并将其复制到public/assets/images文件夹中，然后将URL存储在ActiveAdmin设置中，并在主页上显示图像。但是我不知道为什么，但是在开发中我没有找到错误404。 GET http://localhost:3000/public/assets/images/RackMultipart20180724-9774-1qgvmge.png 404 (Not Found)

我还没有在生产中尝试过，但是它是在debian挤压下运行的专用服务器，您认为它可以工作吗？

class Administration::SettingsController < ApplicationController
  FILE_PATH = "#{Rails.root}/public/assets/images/"
  def update
    errors = []
    complete = 0
    setting_params.each do |setting|
      setting = Setting.find_by(var: setting[0]) || Setting.new(var: setting[0])
      if setting.value != setting_params[setting.var]
        setting.value = setting_params[setting.var]
        if setting.save
          complete += 1
        else
          errors << {setting: setting, error: setting.errors.full_messages}
        end
      end
    end
    redirect_to admin_settings_path, notice: 'Setting has updated.' if errors.count == 0
    redirect_to admin_settings_path, alert: 'Setting update error.' if errors.count > 0
  end

  def upload_file
    create_directory
    tempfile = setting_params[:homepage_image].tempfile
    file_name = File.basename(tempfile.path)
    FileUtils.mv(tempfile, FILE_PATH)
    new_file_path = FILE_PATH + file_name
    if File.exist?(new_file_path)
      Setting.homepage_image = '/public/assets/images/' + file_name
      redirect_to admin_settings_path, notice: 'Setting has updated.'
    else
      redirect_to admin_settings_path, alert: 'Setting update error.'
    end
  end

  private

  def setting_params
    params[:settings][:show_number_of_cars_in_results] = false if params[:settings][:show_number_of_cars_in_results].nil?
    params.require(:settings).permit(:show_number_of_cars_in_results, :homepage_image)
  end

  def create_directory
    unless File.directory?(FILE_PATH)
      FileUtils.mkdir_p FILE_PATH
    end
  end
end