bbPress WordPress プラグインのフォーラムを Discourse へ移行する

Discourse · 2016 年 8 月 19 日午後 2:24

最近、Discourse に内蔵されているマイグレーションスクリプトを使用して、bbPress のデータベースマイグレーションに成功しました。そこで、その手順をステップバイステップのチュートリアルとして共有します。

注意: このチュートリアルは、bbPress プラグイン（レガシーなスタンドアロン版 bbPress ではありません）向けです。

どのデータをインポートできますか？

ユーザー（匿名ユーザーを含む）
カテゴリ
トピック
投稿
プライベートメッセージ（BuddyPress を経由）
アタッチメント
パーマリンク

マイグレーションを開始する前に、マシン（または仮想マシン内）に開発環境を設定し、Docker コンテナ内ではなく、そこでインポートを実行してください。Docker コンテナ内で試したところ、peer authentication failed というエラーが発生しました。そのため、開発用マシンを使用することを強くお勧めします。開発環境のインストールについては、macOS または Ubuntu / Debian のインストールガイドをご覧ください。

Discourse には Ruby 3.4 以上が必要です。Ruby のバージョンは以下のコマンドで確認できます。

ruby -v

次に、mysql2 gem を使用できるようにするため、libmysqlclient-dev 依存関係をインストールする必要があります。

sudo apt-get install libmysqlclient-dev

インストールが正常に完了したら、Discourse の開発環境のインストールパス（通常は ~/discourse）に移動します。

cd ~/discourse

データベース接続の設定

bbPress のインポートスクリプトは、すべてのデータベース接続設定を環境変数から読み取ります。スクリプトファイルを編集する必要はありません。以下の環境変数がサポートされています。

変数	デフォルト	説明
`BBPRESS_HOST`	`localhost`	MySQL データベースホスト
`BBPRESS_USER`	`root`	MySQL ユーザー名
`BBPRESS_PW`	(空)	MySQL パスワード
`BBPRESS_DB`	`bbpress`	MySQL データベース名
`BBPRESS_PREFIX`	`wp_`	WordPress テーブルプレフィックス
`BBPRESS_ATTACHMENTS_DIR`	`/path/to/attachments`	bbPress のアタッチメントディレクトリへのパス

ローカルホストからデータベースをマイグレーションする場合、通常はデータベース名を設定するだけで十分です。

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

外部サーバーからデータベースをマイグレーションする場合、ホスト、ユーザー名、パスワードも設定する必要があります。

IMPORT=1 bundle && IMPORT=1 BBPRESS_HOST="REMOTE_HOST_NAME" BBPRESS_USER="DB_USERNAME" BBPRESS_PW="MY_SECURE_PASSWORD" BBPRESS_DB="DB_NAME" bundle exec ruby script/import_scripts/bbpress.rb

おめでとうございます！ bbPress から Discourse へのデータベースマイグレーションが正常に完了しました

次に、管理画面 /admin/backups からバックアップを取得し、ライブの Discourse ウェブサイトにインポートしてください。

bbPress フォーラムを Discourse へ移行した後、WordPress ウェブサイトをメインサイトとして引き続き使用し、Discourse と連携させたい場合は、Discourse の公式 WordPress プラグインをインストールしてください。

kellbot · 2017 年 2 月 14 日午後 2:16

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!

vinothkannans · 2017 年 2 月 14 日午後 3:43

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

kellbot · 2017 年 2 月 14 日午後 3:57

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.

vinothkannans · 2017 年 2 月 14 日午後 6:27

thanks for the details

lead4good · 2017 年 5 月 25 日午前 11:26

I recently posted on how to import bbpress into discourse

erlend_sh · 2017 年 6 月 5 日午後 3:21

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.

lead4good · 2017 年 6 月 12 日午後 2:57

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.

lcestou · 2019 年 6 月 4 日午後 4:46

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)

RCheesley · 2019 年 8 月 13 日午後 5:09

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

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!
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?

Stephen · 2019 年 8 月 13 日午後 5:46

Are you using SSO from WordPress?

michaeld · 2019 年 8 月 13 日午後 8:42

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

RCheesley · 2019 年 8 月 13 日午後 9:19

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

p0fi · 2019 年 9 月 23 日午後 2:45

Hi

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

Cheers

pfaffman · 2019 年 9 月 23 日午後 4:46

The script appears to import attachments.

github.com/discourse/discourse

script/import_scripts/bbpress.rb

main


      
           FROM #{BB_PRESS_PREFIX}postmeta pm
           JOIN #{BB_PRESS_PREFIX}posts p ON p.id = pm.post_id
          WHERE pm.meta_key = '_wp_attached_file'
            AND p.post_parent > 0

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

p0fi · 2019 年 9 月 29 日午後 12:11

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?

pfaffman · 2019 年 9 月 29 日午後 2:07

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.

p0fi · 2019 年 9 月 30 日午後 4:03

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

pfaffman · 2019 年 9 月 30 日午後 4:05

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.

p0fi · 2019 年 9 月 30 日午後 4:12

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?

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bbPress WordPress プラグインのフォーラムを Discourse へ移行する

どのデータをインポートできますか？

データベース接続の設定

関連トピック