weapp: fix

app/controllers/weapps/code_sessions_controller.rb

@@ -5,14 +5,11 @@ class Weapps::CodeSessionsController < Weapps::BaseController
 
     result = Wechat::Weapp.jscode2session(params[:code])
 
-    set_session_openid(result['openid'])
-    set_weapp_session_key(result['session_key']) # weapp session_key写入缓存 后续解密需要
-
     # 已授权，绑定过账号
     open_user = OpenUsers::Wechat.find_by(uid: result['unionid'])
     if open_user.present? && open_user.user
-      set_session_unionid(result['unionid'])
       successful_authentication(open_user.user)
+      set_session_unionid(result['unionid'])
       logged = true
     else
       # 新用户
@@ -21,6 +18,9 @@ class Weapps::CodeSessionsController < Weapps::BaseController
       set_session_unionid(user_info['unionId'])
     end
 
+    set_session_openid(result['openid'])
+    set_weapp_session_key(result['session_key']) # weapp session_key写入缓存 后续解密需要
+
     render_ok(openid: result['openid'], logged: logged)
   end
 end