diff --git a/app/controllers/weapps/code_sessions_controller.rb b/app/controllers/weapps/code_sessions_controller.rb
index c92c3cb70..887e97eed 100644
--- a/app/controllers/weapps/code_sessions_controller.rb
+++ b/app/controllers/weapps/code_sessions_controller.rb
@@ -25,6 +25,8 @@ class Weapps::CodeSessionsController < Weapps::BaseController
       end
 
       set_session_unionid(user_info['unionId'])
+      user_info['nickname'] = user_info['nickName']
+      session[:wechat_user_extra] = user_info
     end
 
     set_session_openid(result['openid'])
diff --git a/app/controllers/weapps/sessions_controller.rb b/app/controllers/weapps/sessions_controller.rb
index 371a3f7d3..8c7c57a7f 100644
--- a/app/controllers/weapps/sessions_controller.rb
+++ b/app/controllers/weapps/sessions_controller.rb
@@ -16,7 +16,7 @@ class Weapps::SessionsController < Weapps::BaseController
     end
 
     # 绑定微信号
-    OpenUsers::Wechat.create!(user: user, uid: session_unionid) if user.wechat_open_user.blank?
+    OpenUsers::Wechat.create!(user: user, uid: session_unionid, extra: session[:wechat_user_extra]) if user.wechat_open_user.blank?
 
     successful_authentication(user)
   end
diff --git a/app/services/competitions/join_team_service.rb b/app/services/competitions/join_team_service.rb
index cb0253fa2..7ec453013 100644
--- a/app/services/competitions/join_team_service.rb
+++ b/app/services/competitions/join_team_service.rb
@@ -24,7 +24,7 @@ class Competitions::JoinTeamService < ApplicationService
     raise Error, '您已加入该战队' if team.team_members.exists?(user_id: user.id)
 
     enrolled = competition.team_members.exists?(user_id: user.id)
-    if enrolled && (is_teacher && competition.teacher_multiple_limited?) || (!is_teacher && competition.member_multiple_limited?)
+    if enrolled && ((is_teacher && competition.teacher_multiple_limited?) || (!is_teacher && competition.member_multiple_limited?))
       raise Error, '您已加入其它战队'
     end