应用错误收集

我是RoR的初学者我使用Android应用将文件上传到服务器（rails）上传适用于单个文件，有时适用于多个文件。
我跟踪了堆栈跟踪并显示了一些变量，但我不明白为什么会发生错误。
在错误期间，第二个文件在名称中无法识别，但它正在根据文件类型进行识别。我不明白为什么它对下面的那些特定文件起作用。
请帮我理解。

什么时候不起作用：

tag_multipart_encoding（filename，content_type，name）中的数据：

Floyd.txt
text / plain的
文件上传[]

图像/ JPEG

日志：

[2015-11-15 07:52:29] ERROR NoMethodError：未定义的方法force_encoding' for nil:NilClass /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/multipart/parser.rb:197:in tag_multipart_encoding＆＃39; /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/multipart/parser.rb:76:in block (2 levels) in parse' /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/multipart/parser.rb:252:in get_data＆＃39; /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/multipart/parser.rb:75:in block in parse' /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/multipart/parser.rb:56:in循环＆＃39; /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/multipart/parser.rb:56:in parse' /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/multipart.rb:25:in parse_multipart＆＃39; /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/request.rb:376:in parse_multipart' /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/request.rb:208:in POST＆＃39; /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/methodoverride.rb:39:in method_override_param' /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/methodoverride.rb:27:in method_override＆＃39; /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/methodoverride.rb:15:in call' /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/runtime.rb:18:in来电＆＃39; /home/pi/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.3/lib/active_support/cache/strategy/local_cache_middleware.rb:28:in call' /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/lock.rb:17:in来电＆＃39; /home/pi/.rvm/gems/ruby-2.2.1/gems/actionpack-4.2.3/lib/action_dispatch/middleware/static.rb:116:in call' /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/sendfile.rb:113:in来电＆＃39; /home/pi/.rvm/gems/ruby-2.2.1/gems/railties-4.2.3/lib/rails/engine.rb:518:in call' /home/pi/.rvm/gems/ruby-2.2.1/gems/railties-4.2.3/lib/rails/application.rb:165:in来电＆＃39; /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/lock.rb:17:in call' /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/content_length.rb:15:in来电＆＃39; /home/pi/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/handler/webrick.rb:88:in service' /home/pi/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/httpserver.rb:138:in service＆＃39; /home/pi/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/httpserver.rb:94:in run' /home/pi/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/server.rb:294:in阻止在start_thread＆＃39;

什么时候有效：

tag_multipart_encoding（filename，content_type，name）中的数据：

Megadeth Set.png
图像/ PNG
文件上传[]
tmp1.txt
text / plain的
文件上传[]

日志：

开始发布＆＃34; /上传＆＃34; for 2015.1-15 08:12:58 +0530的192.168.1.2 无法从192.168.1.2渲染控制台！允许的网络：127.0.0.1，:: 1,127.0.0.0/127.255.255.255 由HomeController处理＃上传为HTML 参数：{＆＃34; fileUpload＆＃34; =＆gt; [＃，@ original_filename =＆＃34; Megadeth Set.png＆＃34;，@ content_type =＆＃34; image / png＆＃34;，@ headers =＆＃34;内容 - 处置：表格数据;命名= \＆＃34;文件上传[] \＆＃34 ;; filename = \＆＃34; Megadeth Set.png \＆＃34; \ r \ nConContent-Type：image / png \ r \ nContent-Transfer-Encoding：binary \ r \ n＆＃34;＆gt;，＃，@ original_filename =＆＃34; tmp1.txt＆＃34;，@ content_type =＆＃34; text / plain＆＃34;，@ header =＆＃34; Content-Disposition：form-data;命名= \＆＃34;文件上传[] \＆＃34 ;; filename = \＆＃34; tmp1.txt \＆＃34; \ r \ nConContent-Type：text / plain \ r \ nContent-Transfer-Encoding：binary \ r \ n＆＃34;＆gt;]}

Ruby on Rails：ERROR NoMethodError：未定义的方法`force_encoding＆＃39; for nil：`tag_multipart_encoding＆＃39;

0 个答案: