作业打包下载报uninitialized constant ZipdownController::Zip错误问题，解决办法添加require 'zip'

app/controllers/zipdown_controller.rb

@@ -1,5 +1,5 @@
+require 'zip'
 class ZipdownController < ApplicationController
-
   #查找项目（课程）
   before_filter :find_project_by_bid_id, :only => [:assort]
   #检查权限
@@ -124,9 +124,9 @@ class ZipdownController < ApplicationController
 
     Dir.mkdir(File.dirname(zipfile_name)) unless File.exist?(File.dirname(zipfile_name))
 
-		Zip::File.open(zipfile_name, Zip::File::CREATE) do |zipfile|
+    Zip::File.open(zipfile_name, Zip::File::CREATE) do |zipfile|
-			input_filename.each do |filename|
+		  input_filename.each do |filename|
-				rename_file = Time.now.to_i.to_s+ ic.iconv( (File.basename(filename)) ).to_s
+			  rename_file = Time.now.to_i.to_s+ ic.iconv( (File.basename(filename)) ).to_s
 				rename_file = ic.iconv( filename_to_real( File.basename(filename))).to_s if is_attachment
 
 				zipfile.add(rename_file, filename)