通过 SSO 登录创建新用户时出现 Discourse DB 错误

Eingang · 2019 年9 月 2 日 22:14

摘要

由于没有账户的用户尝试通过 SSO 登录时生成了重复的键值，导致 Discourse 数据库约束错误。这会导致外部代理看到内部服务器错误（500）。

讨论

在 8 月 28 日或 29 日，我将 Discourse 更新到了最新的测试版（v2.4.0.beta2），并同时更新了所有已安装的 Discourse 插件。几乎在同一时间，我还更新了 SeAT，并重新配置 Discourse 以使用 UNIX socket，外部 Apache 可以代理/反向代理到该 socket。在此之前，人们可以通过 SeAT 的 EVE Online SSO 登录，如果他们没有账户，Discourse 会自动为他们创建新用户账户。

此后，没有任何新用户账户成功创建。相反，尝试登录的三个人都生成了如下错误：Failed to create or lookup user: ERROR: duplicate key value violates constraint "idx_category_users_user_id_category_id" DETAIL: Key (user_id, category_id)=(36, 6) already exists.。category_id 始终为 6，但 user_id 在 33 到 44 之间变化，甚至出现重复的数字。

假设 category_id 指的是 categories 表中的条目，那么 6 似乎对应的是“Grass Clippings”（草屑）。假设 user_id 指的是 users 表中的条目，那么我们没有任何 ID 大于 32 的条目。

“Grass Clippings”这一类别至少对 2GTHRDiscourse、2GTHRHighCouncil 和 GRoLLake 组中的成员限制了阅读权限。至少有一位尝试连接的人的 add_groups 命令中包含了这三个组。第一个人尚未拥有这三个组中的任何一个，而中间的那个人至少拥有其中之一。他们都生成了相同类型的数据库错误，详细信息完全相同，除了 user_id 不同。

在升级之前通过 SSO 登录并创建 Discourse 账户的用户似乎没有遇到登录问题。

已尝试或查看的事项

关闭 force https 并恢复为外部 Apache 代理到 nginx 端口。
不出所料，这没有任何效果。
调试和修复常见的 SSO 问题
注意 SSO 负载的双重 URL 编码
跟踪了回溯信息，看到 Discourse 执行到了 models/discourse_single_sign_on.rb 第 203 行的 match_email_or_create_user() 函数，该函数调用了 User.create!()。遗憾的是，参数等的日志记录发生在那之后，但由于处理停止并返回 HTTP 500 错误，代码从未到达那里。我检查了 shared/log/rails/production.log.* 以防万一。

其他评论

SeAT：虽然 SeAT Discourse 插件没有更新，但 SeAT 的许多组件已更新。其中可能发生了变化。然而，错误显然发生在 Discourse 端，当尝试创建或查找不存在的用户时，因此我对问题出在 SeAT 端表示怀疑。
Discourse：我不记得升级前运行的是哪个 Discourse 测试版。我猜距离上次升级可能已经有一两个月了。

详细信息

错误

Failed to create or lookup user: ERROR:  duplicate key value violates unique constraint "idx_category_users_user_id_category_id"
DETAIL:  Key (user_id, category_id)=(36, 6) already exists.
.    add_groups: CORPBLUEP,2GTHRAllianceMember,2GTHRALL,2GTHRHighCouncil,2GTHRCorpDirector,2GTHROfficer,DoWCitadelGunner,HCDIM,CORPDIRBLUEP,2GTHRCorpRecruiter,CORPDIRLAWNS,CORPDIR123HC,GRoLLake,DoWCapital,DoWFax,User,CORPHRBLUEP,2GTHRDiscourse
admin: 
moderator: 
avatar_force_update: 
avatar_url: http://image.eveonline.com/Character/740426190_128.jpg
bio: 
card_background_url: 
email: something@somewhere.com
external_id: 740426190
groups: 
locale: 
locale_force_update: 
name: Mindframe
nonce: e6f9da9e62b720a1efd97348ca20f101
profile_background_url: 
remove_groups: Superuser,SPRKYAllianceMember,DoWFieldMarshall,DoWScoutCoordinator,DoWFCGang,DoWFCAlliance,DoWFCSenior,DoWScout,DoWSuper,DoWTitan,DoWFC,2GTHRCorpCEO,DoWTitanBridging,DoLLogisticsSov,DoLLogisticsShipping,HCDoW,HCDoL,HCDoC,HCDoF,DoCDoIT,DoCTechnoMage,DoCDiplomat,DoCDepartmentLead,DoCRecruiterPilots,DoCRecruiterCorporations,DoCDiplomatLead,DoWBLOP,ViewGroups,CORPAIEU,CORPDIRAIEU,CORPZBMC,CORPC.R.Y,CORP123HC,CORPALTBH,CORPLAWNS,CORPDIRZBMC,CORPDIRC.R.Y,CORPDIRALTBH,CORPF3R4L,CORPDIRF3R4L,CORPSPRKY,CORPDIRSPRKY,CORPRMKR,CORPDIRRMKR,CORPHR123HC,CORPHRAIEU,CORPHRZBMC,CORPHRC.R.Y,CORPHRF3R4L,SPRKYDiscourse,CORPHRLAWNS,CORPDIROUSYN,CORPHROUSYN,CORPOUSYN,DoWReimbursementTeam,DoWCarrier,DoWDread,WCMember,WCALL,WCMindframesMarketVisitors
require_activation: 
return_sso_url: 
suppress_welcome_message: 
title: 
username: Mindframe
website:     /var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-1.0.2/lib/patches/db/pg.rb:110:in `async_exec'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-1.0.2/lib/patches/db/pg.rb:110:in `async_exec'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/mini_sql-0.2.2/lib/mini_sql/postgres/connection.rb:118:in `run'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/mini_sql-0.2.2/lib/mini_sql/postgres/connection.rb:90:in `exec'
/var/www/discourse/app/models/user.rb:1403:in `set_default_categories_preferences'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/callbacks.rb:426:in `block in make_lambda'
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/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/callbacks.rb:816:in `_run_create_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/callbacks.rb:346:in `_create_record'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/timestamp.rb:102:in `_create_record'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/persistence.rb:705:in `create_or_update'
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/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/callbacks.rb:132:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/callbacks.rb:816:in `_run_save_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/callbacks.rb:342:in `create_or_update'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/persistence.rb:308:in `save!'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/validations.rb:52:in `save!'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/transactions.rb:315:in `block in save!'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/transactions.rb:387:in `block in with_transaction_returning_status'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/database_statements.rb:267:in `block in transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/transaction.rb:239:in `block in within_new_transaction'
/usr/local/lib/ruby/2.6.0/monitor.rb:230:in `mon_synchronize'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/transaction.rb:236:in `within_new_transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/database_statements.rb:267:in `transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/transactions.rb:212:in `transaction'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/transactions.rb:385:in `with_transaction_returning_status'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/transactions.rb:315:in `save!'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/suppressor.rb:48:in `save!'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/persistence.rb:53:in `create!'
/var/www/discourse/app/models/discourse_single_sign_on.rb:203:in `block in match_email_or_create_user'
/var/www/discourse/lib/distributed_mutex.rb:31:in `block in synchronize'
/var/www/discourse/lib/distributed_mutex.rb:27:in `synchronize'
/var/www/discourse/lib/distributed_mutex.rb:27:in `synchronize'
/var/www/discourse/lib/distributed_mutex.rb:12:in `synchronize'
/var/www/discourse/app/models/discourse_single_sign_on.rb:186:in `match_email_or_create_user'
/var/www/discourse/app/models/discourse_single_sign_on.rb:74:in `lookup_or_create_user'
/var/www/discourse/app/controllers/session_controller.rb:169:in `sso_login'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/abstract_controller/base.rb:194:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_controller/metal/rendering.rb:30:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/abstract_controller/callbacks.rb:42:in `block in process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/callbacks.rb:132:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/abstract_controller/callbacks.rb:41:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_controller/metal/rescue.rb:22:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_controller/metal/instrumentation.rb:34:in `block in process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/notifications.rb:168:in `block in instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/notifications/instrumenter.rb:23:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/notifications.rb:168:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_controller/metal/instrumentation.rb:32:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_controller/metal/params_wrapper.rb:256:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-5.2.3/lib/active_record/railties/controller_runtime.rb:24:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/abstract_controller/base.rb:134:in `process'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionview-5.2.3/lib/action_view/rendering.rb:32:in `process'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-1.0.2/lib/mini_profiler/profiling_methods.rb:78:in `block in profile_method'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_controller/metal.rb:191:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_controller/metal.rb:252:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/routing/route_set.rb:52:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/routing/route_set.rb:34:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/journey/router.rb:52:in `block in serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/journey/router.rb:35:in `each'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/journey/router.rb:35:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/routing/route_set.rb:840:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-protection-2.0.7/lib/rack/protection/frame_options.rb:31:in `call'
/var/www/discourse/lib/middleware/omniauth_bypass_middleware.rb:68:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/tempfile_reaper.rb:15:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/conditional_get.rb:25:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/head.rb:12:in `call'
/var/www/discourse/lib/content_security_policy/middleware.rb:12:in `call'
/var/www/discourse/lib/middleware/anonymous_cache.rb:219:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/session/abstract/id.rb:232:in `context'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/session/abstract/id.rb:226:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/cookies.rb:670:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/callbacks.rb:98:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/callbacks.rb:26:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/debug_exceptions.rb:61:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/logster-2.3.2/lib/logster/middleware/reporter.rb:43:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/rack/logger.rb:38:in `call_app'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/rack/logger.rb:28:in `call'
/var/www/discourse/config/initializers/100-quiet_logger.rb:18:in `call'
/var/www/discourse/config/initializers/100-silence_logger.rb:31:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/request_id.rb:27:in `call'
/var/www/discourse/lib/middleware/enforce_hostname.rb:17:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/method_override.rb:22:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/executor.rb:14:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/sendfile.rb:111:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-1.0.2/lib/mini_profiler/profiler.rb:171:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/message_bus-2.2.2/lib/message_bus/rack/middleware.rb:57:in `call'
/var/www/discourse/lib/middleware/request_tracker.rb:169:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/engine.rb:524:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/railtie.rb:190:in `public_send'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/railtie.rb:190:in `method_missing'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/urlmap.rb:68:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/urlmap.rb:53:in `each'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.0.7/lib/rack/urlmap.rb:53:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.5.1/lib/unicorn/http_server.rb:605:in `process_client'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.5.1/lib/unicorn/http_server.rb:700:in `worker_loop'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.5.1/lib/unicorn/http_server.rb:548:in `spawn_missing_workers'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.5.1/lib/unicorn/http_server.rb:144:in `start'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.5.1/bin/unicorn:128:in `<top (required)>'
/var/www/discourse/vendor/bundle/ruby/2.6.0/bin/unicorn:23:in `load'
/var/www/discourse/vendor/bundle/ruby/2.6.0/bin/unicorn:23:in `<main>'

sam · 2019 年9 月 3 日 04:35

这与以下代码有关：

github.com/discourse/discourse

app/models/user.rb

b9954b53b


      
          def set_default_categories_preferences
            return if self.staged?
          
            values = []
          
            %w{watching watching_first_post tracking muted}.each do |s|
              category_ids = SiteSetting.get("default_categories_#{s}").split("|").map(&:to_i)
              category_ids.each do |category_id|
                next if category_id == 0
                values << "(#{self.id}, #{category_id}, #{CategoryUser.notification_levels[s.to_sym]})"
              end
            end
          
            if values.present?
              DB.exec("INSERT INTO category_users (user_id, category_id, notification_level) VALUES #{values.join(",")}")
            end
          end

这里发生的情况是，我们按如下方式修改了 category_user 的索引：

github.com/discourse/discourse

app/models/category_user.rb

b9954b53b


      
          #  idx_category_users_category_id_user_id  (category_id,user_id) UNIQUE
          #  idx_category_users_user_id_category_id  (user_id,category_id) UNIQUE

您的站点设置中是否存在一个同时被设置为“默认关注”和“默认追踪”的群组？

请查看：default categories watching、default categories tracking、default categories muted 以及 default categories watching first post。

以下修复可以解决问题：

diff --git a/app/models/user.rb b/app/models/user.rb
index c1a94949a6..85b2ca9244 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1390,10 +1390,15 @@ class User < ActiveRecord::Base
     return if self.staged?
 
     values = []
+    # 稍后分配集合
+    seen = nil
 
     %w{watching watching_first_post tracking muted}.each do |s|
       category_ids = SiteSetting.get("default_categories_#{s}").split("|").map(&:to_i)
       category_ids.each do |category_id|
+        seen ||= Set.new
+        next if seen.include?(category_id)
+        seen << category_id
         next if category_id == 0
         values << "(#{self.id}, #{category_id}, #{CategoryUser.notification_levels[s.to_sym]})"
       end
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index cc50d88b2e..4075ee6194 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -1603,8 +1603,12 @@ describe User do
 
       SiteSetting.default_categories_watching = category0.id.to_s
       SiteSetting.default_categories_tracking = category1.id.to_s
-      SiteSetting.default_categories_muted = category2.id.to_s
+
+      # 这是无效的，但我们不进行验证，因此确保不会导致任何故障
+      SiteSetting.default_categories_muted = "#{category2.id}|#{category0.id}"
+
       SiteSetting.default_categories_watching_first_post = category3.id.to_s
+
     end
 
     it "has overriden preferences" do

但我并不喜欢这个修复方案。站点设置应在保存时验证是否存在重叠，并且我们应该迁移掉错误的数据。

@Daniel 我认为你在这里引入了新的约束，也许可以在用户设置站点设置时跟进添加一个验证？

Eingang · 2019 年9 月 3 日 17:58

我有被跟踪的分类和被关注的分类，但它们之间没有重叠。它们都是顶级分类。不过，我在“默认关注分类”和“默认关注首帖分类”之间存在重叠。某个分类同时出现在这两者中，而该分类的 ID 与我数据库中约束错误所提及的分类 ID 一致。这会不会是问题的一部分？

Eingang · 2019 年9 月 3 日 18:11

回复自己：将该分类从“默认关注首帖分类”中移除，使其仅存在于“默认关注分类”中，问题得以解决；此前无法登录的未注册用户现在可以正常登录了。

debryc · 2021 年10 月 5 日 23:48

我刚刚遇到了这个错误。

用户无法登录，因为“招聘备注”和“合作伙伴备注”在 default categories regular 中重复了。

sam · 2021 年10 月 6 日 01:58

在保存设置时，应非常容易防止重复。不过，修复历史记录的问题还不确定。

@vinothkannans 能否确保在保存时，这些默认设置能清理以下内容？

移除重复项
如果您正在为类别 A 保存“默认观看”设置，而类别 A 的“默认追踪”已设置，则报错并说明问题

debryc · 2021 年10 月 6 日 15:31

我对这种情况发生的原因的最佳推测是：

创建了“合作伙伴备注”作为独立类别，并将其设置为“默认类别常规”。
创建了“招聘备注”作为独立类别，并将其设置为“默认类别常规”。
创建了“组织者”作为独立类别，并将其设置为“默认类别常规”。
更改了“合作伙伴备注”和“招聘备注”的设置，将其父类别设为“组织者”，并且（我认为）没有对“默认类别常规”设置进行任何更改。

我完全支持修复此错误，因为新用户无法注册将导致灾难性后果，且难以察觉，因为新用户很可能会直接放弃，而不会联系任何人寻求帮助。

在此期间，或许错误消息中可以包含：“如果您在注册过程中继续遇到问题，请联系 site email 寻求支持？”

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通过 SSO 登录创建新用户时出现 Discourse DB 错误

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