Erro de migração em 'rename_discourse_rewind_disabled_to_enabled'

Don · Janeiro 10, 2026, 8:12pm

Olá

Eu também encontrei esse problema durante a reconstrução. A única maneira de colocar o site de volta no ar foi reverter para um commit anterior. Depois de reverter para um commit funcional, encontrei este tópico e executei as consultas. Espero que os resultados ainda sejam úteis para identificar a causa raiz.

Consulta #1

 table_schema |        column_name        | column_default 
--------------+---------------------------+----------------
 backup       | discourse_rewind_disabled | false
 public       | discourse_rewind_disabled | false
(2 rows)

Consulta #2

 nspname |  oid  
---------+-------
 public  |  2200
 backup  | 22997
(2 rows)

Consulta #3

 table_schema | has_default 
--------------+-------------
 backup       | t
 public       | t
(2 rows)

Consulta #4

       nspname       |  oid  
---------------------+-------
 discourse_functions | 19411
 backup              | 22997
(2 rows)

zogstrip · Janeiro 10, 2026, 8:59pm

Obrigado por executar essas consultas, @Don - você confirmou a causa raiz

Seus resultados mostram exatamente o que suspeitávamos

Você tem um esquema backup com uma cópia de user_options
Essa tabela ainda tem o padrão antigo (column_default = false)
A linha backup apareceu antes de public nos resultados da consulta

Quando a migração removeu o padrão de public.user_options, ela não tocou em backup.user_options. Então, mark_readonly consultou information_schema.columns sem filtrar por esquema, obteve a linha backup primeiro (que ainda tinha o padrão) e falhou

A correção é simplesmente adicionar table_schema = 'public' à consulta para que ela verifique apenas o esquema em que as migrações realmente operam.

github.com/discourse/discourse

FIX: Add `table_schema` filter to `mark_readonly` default check (#37037)

committed 08:57PM - 10 Jan 26 UTC

ZogStriP

+29 -1

## Problem `Migration::ColumnDropper.mark_readonly` could incorrectly detect a …default value from a non-public schema table. The query checking for column defaults did not filter by `table_schema`: ```sql SELECT column_default IS NOT NULL FROM information_schema.columns WHERE table_name = :table_name AND column_name = :column_name ``` When multiple schemas contain tables with the same name (e.g., from backup/restore operations), this query returns multiple rows. The code uses `.first`, making behavior dependent on PostgreSQL's row ordering. ## Root Cause Don's diagnostic queries on an affected instance confirmed the issue: ```plain table_schema | column_name | column_default --------------+---------------------------+---------------- backup | discourse_rewind_disabled | false ← returned first public | discourse_rewind_disabled | false ``` The `backup` schema (from a previous `pg_dump`) contained a copy of `user_options` with the old default. PostgreSQL returned this row first, causing `mark_readonly` to fail with "You must drop a column's default value before marking it as readonly". ## Fix Just a oneline -> adding `table_schema = 'public'` to the `WHERE` clause to ensure only the `public` schema is considered. ## Why it couldn't be reproduced locally? - Fresh dev databases don't have `backup` schemas - CI environments use clean databases - Row ordering depends on database history (OIDs, backup/restore cycles) Ref - https://meta.discourse.org/t/393049

Don · Janeiro 10, 2026, 10:06pm

Obrigado pela correção! Tudo funciona perfeitamente agora para mim

sniper756 · Janeiro 11, 2026, 3:34am

Sinto muito, tive um problema antes de entrar no banco de dados e não consegui fornecer os resultados da consulta, mas felizmente o Don já deu um retorno.

discourse@jerry-app:/var/www/discourse$ bin/rails db
/usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/runtime.rb:71:in `rescue in block (2 levels) in require': There was an error while trying to load the gem 'debug/prelude'. (Bundler::GemRequireError)
Gem Load Error is: cannot load such file -- debug/prelude
Backtrace for gem load error is:
<internal:/usr/local/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:37:in `require'
<internal:/usr/local/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:37:in `require'
/usr/local/lib/ruby/3.3.0/bundled_gems.rb:69:in `block (2 levels) in replace_require'
/usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/runtime.rb:63:in `block (2 levels) in require'
/usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/runtime.rb:58:in `each'
/usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/runtime.rb:58:in `block in require'
/usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/runtime.rb:52:in `each'
/usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/runtime.rb:52:in `require'
/usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler.rb:215:in `require'
/var/www/discourse/config/application.rb:55:in `<main>'
/usr/local/lib/ruby/3.3.0/bundled_gems.rb:69:in `require'
/usr/local/lib/ruby/3.3.0/bundled_gems.rb:69:in `block (2 levels) in replace_require'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/bootsnap-1.19.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/actions.rb:15:in `require_application!'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/environment_argument.rb:31:in `require_application!'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/actions.rb:19:in `boot_application!'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/commands/dbconsole/dbconsole_command.rb:83:in `perform'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/thor-1.4.0/lib/thor/command.rb:28:in `run'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/thor-1.4.0/lib/thor/invocation.rb:127:in `invoke_command'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/base.rb:178:in `invoke_command'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/thor-1.4.0/lib/thor.rb:538:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/base.rb:73:in `perform'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command.rb:65:in `block in invoke'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command.rb:143:in `with_argv'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command.rb:63:in `invoke'
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/commands.rb:18:in `<main>'
Bundler Error Backtrace:

        from /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/runtime.rb:62:in `block (2 levels) in require'
        from /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/runtime.rb:58:in `each'
        from /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/runtime.rb:58:in `block in require'
        from /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/runtime.rb:52:in `each'
        from /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/runtime.rb:52:in `require'
        from /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler.rb:215:in `require'
        from /var/www/discourse/config/application.rb:55:in `<main>'
        from /usr/local/lib/ruby/3.3.0/bundled_gems.rb:69:in `require'
        from /usr/local/lib/ruby/3.3.0/bundled_gems.rb:69:in `block (2 levels) in replace_require'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/bootsnap-1.19.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/actions.rb:15:in `require_application!'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/environment_argument.rb:31:in `require_application!'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/actions.rb:19:in `boot_application!'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/commands/dbconsole/dbconsole_command.rb:83:in `perform'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/thor-1.4.0/lib/thor/command.rb:28:in `run'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/thor-1.4.0/lib/thor/invocation.rb:127:in `invoke_command'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/base.rb:178:in `invoke_command'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/thor-1.4.0/lib/thor.rb:538:in `dispatch'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/base.rb:73:in `perform'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command.rb:65:in `block in invoke'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command.rb:143:in `with_argv'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command.rb:63:in `invoke'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/commands.rb:18:in `<main>'
        from /usr/local/lib/ruby/3.3.0/bundled_gems.rb:69:in `require'
        from /usr/local/lib/ruby/3.3.0/bundled_gems.rb:69:in `block (2 levels) in replace_require'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/bootsnap-1.19.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
        from bin/rails:18:in `<main>'
<internal:/usr/local/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:37:in `require': cannot load such file -- debug/prelude (LoadError)
        from <internal:/usr/local/lib/ruby/3.3.0/rubygems/core_ext/kernel_require.rb>:37:in `require'
        from /usr/local/lib/ruby/3.3.0/bundled_gems.rb:69:in `block (2 levels) in replace_require'
        from /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/runtime.rb:63:in `block (2 levels) in require'
        from /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/runtime.rb:58:in `each'
        from /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/runtime.rb:58:in `block in require'
        from /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/runtime.rb:52:in `each'
        from /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler/runtime.rb:52:in `require'
        from /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.6.4/lib/bundler.rb:215:in `require'
        from /var/www/discourse/config/application.rb:55:in `<main>'
        from /usr/local/lib/ruby/3.3.0/bundled_gems.rb:69:in `require'
        from /usr/local/lib/ruby/3.3.0/bundled_gems.rb:69:in `block (2 levels) in replace_require'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/bootsnap-1.19.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/actions.rb:15:in `require_application!'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/environment_argument.rb:31:in `require_application!'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/actions.rb:19:in `boot_application!'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/commands/dbconsole/dbconsole_command.rb:83:in `perform'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/thor-1.4.0/lib/thor/command.rb:28:in `run'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/thor-1.4.0/lib/thor/invocation.rb:127:in `invoke_command'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/base.rb:178:in `invoke_command'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/thor-1.4.0/lib/thor.rb:538:in `dispatch'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/base.rb:73:in `perform'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command.rb:65:in `block in invoke'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command.rb:143:in `with_argv'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command.rb:63:in `invoke'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/commands.rb:18:in `<main>'
        from /usr/local/lib/ruby/3.3.0/bundled_gems.rb:69:in `require'
        from /usr/local/lib/ruby/3.3.0/bundled_gems.rb:69:in `block (2 levels) in replace_require'
        from /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/bootsnap-1.19.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
        from bin/rails:18:in `<main>'
discourse@jerry-app:/var/www/discourse$

Mas como devo resolver esse problema de entrar no banco de dados?

sniper756 · Janeiro 11, 2026, 4:14am

Eu verifiquei seguindo o processo abaixo:

# 1. Ver a localização de debug no Gemfile
grep -n debug /var/www/discourse/Gemfile

# 2. Ver se application.rb requer diretamente
grep -n debug /var/www/discourse/config/application.rb

# 3. Ver se foi introduzido por um plugin
find /var/www/discourse/plugins -name '*.rb' -exec grep -l debug {} \;

Os resultados retornados são:

discourse@jerry-app:~$ grep -n debug /var/www/discourse/Gemfile
147:  gem "debug", ">= 1.0.0", require: "debug/prelude"
discourse@jerry-app:~$ grep -n debug /var/www/discourse/config/application.rb
discourse@jerry-app:~$ find /var/www/discourse/plugins -name '*.rb' -exec grep -l debug {} \;
/var/www/discourse/plugins/chat/app/controllers/chat/incoming_webhooks_controller.rb
/var/www/discourse/plugins/chat/app/jobs/regular/chat/channel_delete.rb
/var/www/discourse/plugins/chat/spec/requests/chat/incoming_webhooks_controller_spec.rb
/var/www/discourse/plugins/automation/lib/discourse_automation/triggers/recurring.rb
/var/www/discourse/plugins/discourse-oauth2-basic/lib/oauth2_basic_authenticator.rb
/var/www/discourse/plugins/discourse-ai/app/controllers/discourse_ai/admin/ai_llms_controller.rb
/var/www/discourse/plugins/discourse-ai/app/controllers/discourse_ai/ai_bot/bot_controller.rb
/var/www/discourse/plugins/discourse-ai/evals/lib/recorder.rb
/var/www/discourse/plugins/discourse-ai/evals/lib/prompts/single_test_runner.rb
/var/www/discourse/plugins/discourse-ai/discourse_automation/llm_report.rb
/var/www/discourse/plugins/discourse-ai/lib/automation/llm_tagger.rb
/var/www/discourse/plugins/discourse-ai/lib/automation/report_runner.rb
/var/www/discourse/plugins/discourse-ai/lib/ai_bot/response_http_streamer.rb
/var/www/discourse/plugins/discourse-ai/lib/ai_bot/entry_point.rb
/var/www/discourse/plugins/discourse-ai/lib/guardian_extensions.rb
/var/www/discourse/plugins/discourse-ai/config/routes.rb
/var/www/discourse/plugins/discourse-ai/spec/requests/ai_bot/bot_controller_spec.rb
/var/www/discourse/plugins/discourse-ai/spec/lib/modules/automation/report_runner_spec.rb
/var/www/discourse/plugins/discourse-ai/spec/lib/modules/ai_bot/entry_point_spec.rb
/var/www/discourse/plugins/docker_manager/app/controllers/docker_manager/admin_controller.rb

Eu usei a instalação do discourse via docker (sem instalar nenhum plugin), instalei o mysql no contêiner, importei o banco de dados do xenforo e usei o script de migração para migrar do xenforo para o discourse. Durante esse processo, devo ter modificado a configuração do Gemfile no contêiner. Após a migração ser bem-sucedida, realizei várias reconstruções (rebuilds) para atualização.

Minha dúvida é: por que ainda tenho problemas ao executar bin/rails db mesmo depois de ter feito várias reconstruções e atualizações no discourse?

Obrigado.

sniper756 · Janeiro 11, 2026, 6:49pm

Feedback mais recente: reinstalei o sistema operacional, reimplantei o Discourse e importei o backup. O erro ainda está ocorrendo.

system · Fevereiro 10, 2026, 9:01pm

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.

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Erro de migração em 'rename_discourse_rewind_disabled_to_enabled'

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