fixed 删除用户时保留项目动态数据

app/views/project_trends/_detail.json.jbuilder

@@ -2,8 +2,8 @@ json.id trend.id
 json.trend_type trend.trend_type
 json.action_type l("trend.#{trend.action_type}") + l("trend.#{trend.trend_type}")
 json.trend_id trend.trend_id
-json.user_name trend.user.try(:show_real_name)
-json.user_login trend.user.blank?? "已注销": trend.user.login
+json.user_name trend.user.blank?? "已注销": trend.user.show_real_name
+json.user_login trend.user&.login
 json.user_avatar trend.user.blank?? User::Avatar.get_letter_avatar_url("D") : url_to_avatar(trend.user)
 json.action_time time_from_now(trend.created_at)
 json.project do