diff --git a/app/controllers/wechats_controller.rb b/app/controllers/wechats_controller.rb
index 3a8b80883..f49398ff7 100644
--- a/app/controllers/wechats_controller.rb
+++ b/app/controllers/wechats_controller.rb
@@ -148,7 +148,7 @@ class WechatsController < ActionController::Base
 
   def join_request(request)
     openid = request[:FromUserName]
-    wl = WechatLog.where(openid: openid).order('id desc').first
+    wl = WechatLog.where("openid = '#{openid}' and request_raw like '%\"Event\":\"click\"%'").order('id desc').first
     wl && JSON(wl.request_raw)["EventKey"] == 'JOIN_CLASS'
   end