.

app/controllers/wechats_controller.rb

@@ -128,9 +128,14 @@ class WechatsController < ActionController::Base
     default_msg(request)
   end
 
-  on :click, with: 'JOIN_CLASS' do |reques, key|
+  on :click, with: 'JOIN_CLASS' do |request, key|
+    uw = user_binded?(request[:FromUserName])
+    unless uw
+      sendBind(request)
+    else
       request.reply.text "请直接回复班级邀请码 (不区分大小写):"
     end
+  end
 
   def default_msg(request)
     uw = user_binded?(request[:FromUserName])