之前发贴求助过上传的问题，@alucardpj 大侠推荐我用 nginx 的 upload module，几经周折之后，终于可以上传了

然而现在的问题是：

nginx 上传的文件都是 000000001 0000000002 这样子的，无法识别。想用 ruby 读出来然后重命名，但加断点后访问文件时说我没权限。

我开始以为是路径问题，于是把 nginx 配置里的upload_store /tmp/upload_tmp改成了upload_store /home/terry/RubymineProjects/EIMV6/public/uploaded，但是不行；

又把upload_store_access user:rw;改成了upload_store_access user:rw group:rw all:rw;，还是不行。

我的 Rails 里用了一个 carrierwave，这个不重要吧？nginx 配置的接管文件处理的代码长这样：

def self.save_uploaded_file(params)
  z = self.new
  z.name = params[:pdf_file_name]
  z.save!
  byebug
end

断点断住之后报这个错

(byebug) File.read params[:pdf_file_path]
*** Errno::EACCES Exception: Permission denied @ rb_sysopen - /home/terry/RubymineProjects/EIMV6/public/uploaded/0042681049

而且我试了下，直接从 irb 访问，也是报没权限：

terry@TerryUbuntu:~/RubymineProjects/EIMV6$ irb
2.3.0 :001 >  File.read '/home/terry/RubymineProjects/EIMV6/public/uploaded/0000000001'
Errno::EACCES: Permission denied @ rb_sysopen - /home/terry/RubymineProjects/EIMV6/public/uploaded/0000000001
    from (irb):1:in `read'
    from (irb):1
    from /home/terry/.rvm/rubies/ruby-2.3.0/bin/irb:11:in `<main>'
2.3.0 :002 > File.stat '/home/terry/RubymineProjects/EIMV6/public/uploaded/0000000001'
Errno::EACCES: Permission denied @ rb_file_s_stat - /home/terry/RubymineProjects/EIMV6/public/uploaded/0000000001
    from (irb):2:in `stat'
    from (irb):2
    from /home/terry/.rvm/rubies/ruby-2.3.0/bin/irb:11:in `<main>'
2.3.0 :003 > File.file? '/home/terry/RubymineProjects/EIMV6/public/uploaded/0000000001'
 => false 

请各位不吝赐教！谢谢！