.

app/controllers/wechats_controller.rb

@@ -6,7 +6,6 @@ class WechatsController < ActionController::Base
 
   # default text responder when no other match
   on :text do |request, content|
-    if content.size == 6
       #邀请码
       if join_class(content)
         root_url = "http://wechat.trustie.net"
@@ -20,13 +19,11 @@ class WechatsController < ActionController::Base
                        description: n[:content],
                        pic_url: pic_url,
                        url: url
-        end and return
-      else
-        request.reply.text "课程邀请码不正确" and return
-      end
         end
+      else
         request.reply.text "您的意见已收到，感谢您的反馈！" # Just echo
       end
+  end
 
   # When receive 'help', will trigger this responder
   on :text, with: 'help' do |request|