竞赛接口

app/views/competitions/competition_teams/index.json.jbuilder

@@ -29,6 +29,7 @@ json.my_teams @teams.each do |team|
   json.extract! team, :id, :name, :invite_code
   json.team_type team.en_team_type
   json.school_name team.user.school_name
+  json.created_at team.created_at.strftime("%Y-%m-%d %H:%M")
 
   json.manage_permission current_user.id == team.user_id