Flarum 到 Discourse 迁移脚本

Lecter · 2021 年5 月 24 日 20:52

Hey All,

Just figured I’d make a quick post with a little bit on how I migrated our 25,000+ member, 250,000+ post forum from Flarum to Discourse.

As I’m sure you know if you’re reading this, there’s no official import script for Flarum → Discourse, however @koen360 was kind enough to share his work with getting the FluxBB importer modified to import users. However, we needed to also import posts as a large part of our forums success rides on users searching for very specific terms that appear in posts. So that’s what we did…with several hours of failed migrations, headaches, and some bloodshed.

I’m by no means an expert in writing migration scripts, but this script works well enough for the current version of Flarum at the time of writing (V0.1.0-beta.16). The script (attached below) will need access to your MySQL/MariaDB database, preferably a copy of it so you don’t wreck your production site if something goes wrong. Just replace the dummy values in the MySQL connection and you should be set.

Just make sure you have a full backup of your Flarum database before you start this process, if something goes wrong it’s likely irreversible.

If you need assistance with your migration from Flarum → Discourse feel free to reply to this thread, I’m by no means an expert, but I’ll try to help out however I can.

You can get the importer here, apparently I can’t upload a file since this is my first post

justin · 2021 年5 月 25 日 12:29

Thanks for making the script @Lecter! Can you submit it as a PR to discourse/discourse? We don’t have a Flarum script yet, so this would be helpful to have as a base.

Lecter · 2021 年5 月 25 日 13:40

Absolutely! PR Incoming…

oshyan · 2021 年8 月 13 日 20:50

This is great, thank you for taking this importer a step further! I do hope in time it can also be expanded to include Tags, if not Attachments.

How much work might it be to add Tag support? I see vBulletin 5 and maybe a couple others have possible models of how it works, but I have no idea how much that would need to be adjusted for Flarum. Thanks for any insight anyone can provide, and no worries if it’s not something that can really be answered without doing it.

kovalr · 2022 年6 月 13 日 20:19

你好 @Lecter ！

你的脚本还可用吗？

可以再分享一次吗？因为你的链接失效了。

感谢你考虑我的请求。

Falco · 2022 年6 月 13 日 20:46

由 @Lecter 编写的脚本现已位于

github.com/discourse/discourse

script/import_scripts/flarum_import.rb

main

# frozen_string_literal: true

require "mysql2"
require "time"
require "date"

require_relative "base"

class ImportScripts::FLARUM < ImportScripts::Base
  #SET THE APPROPRIATE VALUES FOR YOUR MYSQL CONNECTION
  FLARUM_HOST = ENV["FLARUM_HOST"] || "db_host"
  FLARUM_DB = ENV["FLARUM_DB"] || "db_name"
  BATCH_SIZE = 1000
  FLARUM_USER = ENV["FLARUM_USER"] || "db_user"
  FLARUM_PW = ENV["FLARUM_PW"] || "db_user_pass"

  def initialize
    super

    @client =

This file has been truncated. show original

kovalr · 2022 年6 月 14 日 15:42

有人能帮我迁移一下吗？

我的 Discourse 帖子是空的，只有 3 个默认分类。
当我尝试将 Flarum 的 SQL 导入 Discourse 时，我收到了这个错误：

su discourse -c 'bundle exec ruby script/import_scripts/flarum_import.rb'
Loading existing groups...
Loading existing users...
Loading existing categories...
Loading existing posts...
Loading existing topics...

creating users
       13 / 13 (100.0%)  [281 items/min]  n]  
importing top level categories...
       39 / 39 (100.0%)  [420 items/min]  n]  
importing children categories...
       39 / 39 (100.0%)  [290 items/min]  
creating topics and posts
Traceback (most recent call last):
	19: from script/import_scripts/flarum_import.rb:162:in `<main>'
	18: from /var/www/discourse/script/import_scripts/base.rb:47:in `perform'
	17: from script/import_scripts/flarum_import.rb:32:in `execute'
	16: from script/import_scripts/flarum_import.rb:101:in `import_posts'
	15: from /var/www/discourse/script/import_scripts/base.rb:916:in `batches'
	14: from /var/www/discourse/script/import_scripts/base.rb:916:in `loop'
	13: from /var/www/discourse/script/import_scripts/base.rb:917:in `block in batches'
	12: from script/import_scripts/flarum_import.rb:122:in `block in import_posts'
	11: from /var/www/discourse/script/import_scripts/base.rb:224:in `all_records_exist?'
	10: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/activerecord-7.0.3/lib/active_record/transactions.rb:209:in `transaction'
	 9: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/activerecord-7.0.3/lib/active_record/connection_adapters/abstract/database_statements.rb:316:in `transaction'
	 8: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/activerecord-7.0.3/lib/active_record/connection_adapters/abstract/transaction.rb:317:in `within_new_transaction'
	 7: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/activesupport-7.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:21:in `synchronize'
	 6: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/activesupport-7.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:21:in `handle_interrupt'
	 5: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/activesupport-7.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `block in synchronize'
	 4: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/activesupport-7.0.3/lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `handle_interrupt'
	 3: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/activerecord-7.0.3/lib/active_record/connection_adapters/abstract/transaction.rb:319:in `block in within_new_transaction'
	 2: from /var/www/discourse/script/import_scripts/base.rb:231:in `block in all_records_exist?'
	 1: from /var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rack-mini-profiler-3.0.0/lib/patches/db/pg.rb:56:in `exec'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rack-mini-profiler-3.0.0/lib/patches/db/pg.rb:56:in `exec': ERROR:  current transaction is aborted, commands ignored until end of transaction block (PG::InFailedSqlTransaction)

问题出在 Key (val)=(7) already exists.

`exec': ERROR:  duplicate key value violates unique constraint "import_ids_pkey" (PG::UniqueViolation)
DETAIL:  Key (val)=(7) already exists.

root@raspberrypi-app:/var/www/discourse# rake db:validate_indexes
Starting postgres on port: 11000
Waiting for PG server to start...
PG server is ready and DB is loaded
Running migrations on blank database!

Testing indexes on the default database

No missing indexes

No extra indexes

我该如何解决这个问题？

kovalr · 2022 年6 月 14 日 22:18

此 SQL 代码会破坏脚本

 SELECT p.id id,
               d.id topic_id,
               d.title title,
               d.first_post_id first_post_id,
               p.user_id user_id,
               p.content raw,
               p.created_at created_at,
               t.tag_id category_id
        FROM posts p,
             discussions d,
             discussion_tag t
        WHERE p.discussion_id = d.id
          AND t.discussion_id = d.id
        ORDER BY p.created_at

kovalr · 2022 年6 月 15 日 16:56

我找到了问题。在我的例子中，一个帖子有多个标签。删除这些帖子后，导入脚本就能正常处理了。

Bishwas_Bhandari · 2022 年11 月 22 日 06:19

我遇到了这个错误

ubuntu@ip-172-26-1-78:~/discourse$ bundle exec ruby script/import_scripts/flarum_import.rb
Loading existing groups...
Loading existing users...
Loading existing categories...
Loading existing posts...
Loading existing topics...

creating users
Skipping 1000 already imported users
Skipping 826 already imported users

importing top level categories...
       34 / 34 (100.0%)  [5728165 items/min]  
importing children categories...
       34 / 34 (100.0%)  [3194 items/min]  
creating topics and posts
Traceback (most recent call last):
	19: from script/import_scripts/flarum_import.rb:162:in `<main>'
	18: from /home/ubuntu/discourse/script/import_scripts/base.rb:47:in `perform'
	17: from script/import_scripts/flarum_import.rb:32:in `execute'
	16: from script/import_scripts/flarum_import.rb:101:in `import_posts'
	15: from /home/ubuntu/discourse/script/import_scripts/base.rb:916:in `batches'
	14: from /home/ubuntu/discourse/script/import_scripts/base.rb:916:in `loop'
	13: from /home/ubuntu/discourse/script/import_scripts/base.rb:917:in `block in batches'
	12: from script/import_scripts/flarum_import.rb:122:in `block in import_posts'
	11: from /home/ubuntu/discourse/script/import_scripts/base.rb:224:in `all_records_exist?'
	10: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/activerecord-7.0.3.1/lib/active_record/transactions.rb:209:in `transaction'
	 9: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/activerecord-7.0.3.1/lib/active_record/connection_adapters/abstract/database_statements.rb:316:in `transaction'
	 8: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/activerecord-7.0.3.1/lib/active_record/connection_adapters/abstract/transaction.rb:317:in `within_new_transaction'
	 7: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/activesupport-7.0.3.1/lib/active_support/concurrency/load_interlock_aware_monitor.rb:21:in `synchronize'
	 6: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/activesupport-7.0.3.1/lib/active_support/concurrency/load_interlock_aware_monitor.rb:21:in `handle_interrupt'
	 5: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/activesupport-7.0.3.1/lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `block in synchronize'
	 4: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/activesupport-7.0.3.1/lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `handle_interrupt'
	 3: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/activerecord-7.0.3.1/lib/active_record/connection_adapters/abstract/transaction.rb:319:in `block in within_new_transaction'
	 2: from /home/ubuntu/discourse/script/import_scripts/base.rb:243:in `block in all_records_exist?'
	 1: from /home/ubuntu/discourse/script/import_scripts/base.rb:243:in `ensure in block in all_records_exist?'
	 1: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/rack-mini-profiler-3.0.0/lib/patches/db/pg.rb:56:in `exec'
/home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/rack-mini-profiler-3.0.0/lib/patches/db/pg.rb:56:in `exec': ERROR:  duplicate key value violates unique constraint "import_ids_pkey" (PG::UniqueViolation)
DETAIL:  Key (val)=(53) already exists.
	20: from script/import_scripts/flarum_import.rb:162:in `<main>'
	19: from /home/ubuntu/discourse/script/import_scripts/base.rb:47:in `perform'
	18: from script/import_scripts/flarum_import.rb:32:in `execute'
	17: from script/import_scripts/flarum_import.rb:101:in `import_posts'
	16: from /home/ubuntu/discourse/script/import_scripts/base.rb:916:in `batches'
	15: from /home/ubuntu/discourse/script/import_scripts/base.rb:916:in `loop'
	14: from /home/ubuntu/discourse/script/import_scripts/base.rb:917:in `block in batches'
	13: from script/import_scripts/flarum_import.rb:122:in `block in import_posts'
	12: from /home/ubuntu/discourse/script/import_scripts/base.rb:224:in `all_records_exist?'
	11: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/activerecord-7.0.3.1/lib/active_record/transactions.rb:209:in `transaction'
	10: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/activerecord-7.0.3.1/lib/active_record/connection_adapters/abstract/database_statements.rb:316:in `transaction'
	 9: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/activerecord-7.0.3.1/lib/active_record/connection_adapters/abstract/transaction.rb:317:in `within_new_transaction'
	 8: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/activesupport-7.0.3.1/lib/active_support/concurrency/load_interlock_aware_monitor.rb:21:in `synchronize'
	 7: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/activesupport-7.0.3.1/lib/active_support/concurrency/load_interlock_aware_monitor.rb:21:in `handle_interrupt'
	 6: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/activesupport-7.0.3.1/lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `block in synchronize'
	 5: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/activesupport-7.0.3.1/lib/active_support/concurrency/load_interlock_aware_monitor.rb:25:in `handle_interrupt'
	 4: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/activerecord-7.0.3.1/lib/active_record/connection_adapters/abstract/transaction.rb:319:in `block in within_new_transaction'
	 3: from /home/ubuntu/discourse/script/import_scripts/base.rb:243:in `block in all_records_exist?'
	 2: from /home/ubuntu/discourse/script/import_scripts/base.rb:243:in `ensure in block in all_records_exist?'
	 1: from /home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/rack-mini-profiler-3.0.0/lib/patches/db/pg.rb:56:in `exec'
/home/ubuntu/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0/gems/rack-mini-profiler-3.0.0/lib/patches/db/pg.rb:56:in `exec': ERROR:  current transaction is aborted, commands ignored until end of transaction block (PG::InFailedSqlTransaction)

mambonr5 · 2024 年2 月 21 日 23:37

你好，

你能解释一下你是怎么做到的吗？因为我遇到了和你一样的错误，但是不是（val)=(7)，而是：

`exec’: ERROR: duplicate key value violates unique constraint "import_ids_pkey" (PG::UniqueViolation)
DETAIL: Key (val)=(1) already exists.

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