Migrar um fórum do plugin bbPress do WordPress para o Discourse

Recentemente, realizei com sucesso uma migração de banco de dados bbPress usando o script de migração integrado do Discourse. Agora, vou compartilhá-lo como um tutorial passo a passo.

Nota: Este tutorial é para o plugin bbPress, não para a versão autônoma legada do bbPress.

Quais dados podem ser importados?

• Usuários (incluindo usuários anônimos)
• Categorias
• Tópicos
• Publicações
• Mensagens privadas (via BuddyPress)
• Anexos
• Links permanentes (Permalinks)

Antes de iniciar a migração, configure um ambiente de desenvolvimento em sua máquina (ou dentro de uma máquina virtual) e execute a importação ali, em vez de dentro do contêiner Docker. Quando tentei fazer isso dentro do contêiner Docker, obtive o erro peer authentication failed. Portanto, recomendo fortemente que você use uma máquina de desenvolvimento. Consulte o guia de instalação para desenvolvimento no macOS ou Ubuntu / Debian.

O Discourse requer Ruby 3.4+. Você pode verificar sua versão do Ruby com:

ruby -v

Agora, precisamos instalar a dependência libmysqlclient-dev para poder usar o gem mysql2.

sudo apt-get install libmysqlclient-dev

Após a instalação bem-sucedida, vá para o caminho da sua instalação de desenvolvimento do Discourse (geralmente ~/discourse).

cd ~/discourse

Configurando a conexão com o banco de dados

O script de importação do bbPress lê todas as configurações de conexão do banco de dados a partir de variáveis de ambiente. Você não precisa editar o arquivo do script. As seguintes variáveis de ambiente são suportadas:

Se você estiver migrando seu banco de dados do localhost, geralmente só precisa definir o nome do banco de dados:

IMPORT=1 bundle && IMPORT=1 BBPRESS_DB="meu_bbpress" bundle exec ruby script/import_scripts/bbpress.rb

Se você estiver migrando seu banco de dados de um servidor externo, também precisará definir o host, o nome de usuário e a senha:

IMPORT=1 bundle && IMPORT=1 BBPRESS_HOST="NOME_DO_SERVIDOR_REMOTO" BBPRESS_USER="NOME_USUARIO_BD" BBPRESS_PW="MINHA_SENHA_SEGURA" BBPRESS_DB="NOME_BD" bundle exec ruby script/import_scripts/bbpress.rb

Parabéns! Seu banco de dados foi migrado com sucesso do bbPress para o Discourse

Agora, faça um backup na página de administração /admin/backups e importe-o no seu site Discourse ao vivo.

Após mover seu fórum bbPress para o Discourse, se você ainda for usar seu site WordPress como site principal e quiser conectá-lo ao Discourse, instale o plugin oficial do WordPress para Discourse.

Just wanted to thank you for providing this step-by-step guide. We migrated our site from bbpress to Discourse with minimal headache thanks to you. Since we’re running multisite wordpress there were a few tweaks to make to the importer, but other than that it went very smoothly. Thanks!

If you can share your tweaks then it will be helpful to other multisite owners.

Admittedly I didn’t take very good notes, and have since killed the VM it
was on (sorry!) but the basic gist is that if your bbpress install is not
on the primary site of the Multisite setup you’ll need to a) set the
environmental variable for BBPRESS_PREFIX to include your site’s ID number
(e.g. wp_6_ ) and then edit the migration script to use wp_users rather
than #{BBPRESS_PREFIX} for the Users sql. This is because on Multisite
installations the wp_users table is shared across sites and then each site
has its own tables for posts, postmeta, etc.

thanks for the details

I recently posted on how to import bbpress into discourse

Great job on the tutorial! But it’s confusing to have two different guides on this. Do they serve different purposes? Otherwise we should figure out how to merge them.

That guide is about how to import bbpress inside of a development environment, mine is how to import bbpress using the docker container. It’s just 2 different ways to go. I’d recommend importing via docker container since it doesn’t ask for the additional step of setting up a development environment, which can be cumbersome.

Hello I am stuck trying to import successfully after all users are done importing.

As soon it begins to import anonymous users it cancels with an error of “Invalid Email… and Validation failed: Username can’t be blank (ActiveRecord::RecordInvalid)”.

I added the error below, does anyone encountered this before or have any ideas on what I should do?

Thanks,

importing anonymous users...
Invalid email '' for ''. Using '6be92499a6f885cb271d94bffd5e667b@email.invalid'
Error on record: {:id=>"", :email=>"", :name=>"", :website=>nil}
Traceback (most recent call last):
	23: from script/import_scripts/bbpress.rb:512:in `<main>'
	22: from /home/lutechi/discourse/script/import_scripts/base.rb:49:in `perform'
	21: from script/import_scripts/bbpress.rb:31:in `execute'
	20: from script/import_scripts/bbpress.rb:153:in `import_anonymous_users'
	19: from /home/lutechi/discourse/script/import_scripts/base.rb:249:in `create_users'
	18: from /home/lutechi/discourse/script/import_scripts/base.rb:249:in `each'
	17: from /home/lutechi/discourse/script/import_scripts/base.rb:261:in `block in create_users'
	16: from /home/lutechi/discourse/script/import_scripts/base.rb:337:in `create_user'
	15: from /home/lutechi/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/activerecord-5.2.3/lib/active_record/transactions.rb:212:in `transaction'
	14: from /home/lutechi/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/database_statements.rb:267:in `transaction'
	13: from /home/lutechi/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/transaction.rb:236:in `within_new_transaction'
	12: from /home/lutechi/.rbenv/versions/2.6.2/lib/ruby/2.6.0/monitor.rb:230:in `mon_synchronize'
	11: from /home/lutechi/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/transaction.rb:239:in `block in within_new_transaction'
	10: from /home/lutechi/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/database_statements.rb:267:in `block in transaction'
	 9: from /home/lutechi/discourse/script/import_scripts/base.rb:338:in `block in create_user'
	 8: from /home/lutechi/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/activerecord-5.2.3/lib/active_record/suppressor.rb:48:in `save!'
	 7: from /home/lutechi/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/activerecord-5.2.3/lib/active_record/transactions.rb:315:in `save!'
	 6: from /home/lutechi/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/activerecord-5.2.3/lib/active_record/transactions.rb:385:in `with_transaction_returning_status'
	 5: from /home/lutechi/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/activerecord-5.2.3/lib/active_record/transactions.rb:212:in `transaction'
	 4: from /home/lutechi/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/activerecord-5.2.3/lib/active_record/connection_adapters/abstract/database_statements.rb:265:in `transaction'
	 3: from /home/lutechi/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/activerecord-5.2.3/lib/active_record/transactions.rb:387:in `block in with_transaction_returning_status'
	 2: from /home/lutechi/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/activerecord-5.2.3/lib/active_record/transactions.rb:315:in `block in save!'
	 1: from /home/lutechi/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/activerecord-5.2.3/lib/active_record/validations.rb:52:in `save!'
/home/lutechi/.rbenv/versions/2.6.2/lib/ruby/gems/2.6.0/gems/activerecord-5.2.3/lib/active_record/validations.rb:80:in `raise_validation_error': Validation failed: Username can't be blank (ActiveRecord::RecordInvalid)

Thanks for this useful tutorial - worked for me although I have a couple of small issues:

1. The install process seemed to install postgres 11 and Discourse hosted version support postgres 10, so that’s giving them a bit of a headache!

2. My imported users don’t seem to be able to log into Discourse with their WordPress credentials - I tried it with my own user account, both with the username and the email address, but neither work. I can log into WordPress fine and the user account is present in Discourse, with the associated forum threads. Something changed with passwords/auth maybe?

Are you using SSO from WordPress?

This requires the migrate password plugin. Did you install that?

Hi Michael,

No, that is the first reference I’ve found to the plugin, so thank you for highlighting it - maybe I missed a step somewhere! Thanks for sharing I will take a closer look tomorrow when my eyes aren’t quite so tired!

Ruth

Hi

Can user uploaded pictures also be migrated?
The plugin for the user uploads was GD bbPress Attachments

Cheers

The script appears to import attachments.

You need to set a BB_PRESS_ATTACHMENTS_DIR ENV variable with the path to the attachments.

The uploads of the bbPress plugin appear to be stored in the /uploads folder of the WordPress installation. The GD bbPress Attachments was used for this. Im not sure which kind of path I should put in the BB_PRESS_ATTACHMENTS_DIR variable. Could you help me here a bit? Should I put the full URL path to the uploads e.g. http://www.example.com/httpdocs/wp-content/uploads/2018/02/picture.png or what else?

I saw that the import script didn’t finish successfully since the import_private_messages step failed. Private messages were not activated in the forum. I removed that step form the script and it fails with the message: table wp_bb_attachments doesn't exist which is true. I can’t find any table for attachments in the database tho. How could that attachments have worked in the first place?

The attachments need to be in a directory on the server where you run the import.

If you don’t see the attachment table that the script is looking for It may be that you have used some different means of handling attachments than the script expects. My guess is that they are either in a different table that you haven’t found or that the relative filename is in the posts themselves.

It sounds like you need to another function to import them. If you have a budget I can help. Discourse Migration — Literate Computing, LLC has information about imports. You don’t need full service, it seems, so your cost would be less than suggested there.

Since Discourse always runs in a docker container should this directory be linked into the import container?

Correct. If you’re running the import from a container then you need to put those images somewhere that the can be seen from the container and use that path.

One last question. Since you mentioned your import service I checked the site and did some more digging into my database and found where the attachments are stored. One sentence on your page made me worry a bit:

For example, some forums can attach files to a post without mentioning them in the body of the message, the import script identifies attachments by replacing references to them in the message body; when this happens, those un-linked attachments are omitted.

I found that my attachments where stored in the wp_postsmeta table as _wp_attached_file. The post itself which had this attachment linked however does not have a mention of this in the post body. It seems the only link here is the post_id and its meta_id. Does this mean that this is an “un-linked attachment” and will be omitted?