After spending way too many hours I thought I was close but then… $ bundle exec ruby script/import_scripts/mybb.rb Loading existing groups... Loading existing users... Loading existing categories... Loading existing posts... Loading existing topics... creating users script/import_scripts/mybb.rb:96:in `block (3 levels) in import_users': undefined method `exists?' for File:Class (NoMethodError) @uploader.create_avatar(newuser, filename) if File.exists?(filename) ^^^^^^^^ Did you mean? exist? still no cigar :frowning:

Summing up the (much longer than this post) :wink: journey: NOTE: I used a Kubuntu distribution running in virtual machine for the process so please have in mind that it may not be the same on different OS or even distribution 0. installing Discourse dev environment Following this post and running this script linked to in the post using `bash mybb_dump.sql and copy/move it over to the newly set development environment. Install MySQL server $ sudo apt-get install mysql-server Authentication for mysql changed in more recent versions. You have to be root on the host if you want to be root on mysql these days so $ sudo mysql instead of $mysql -u root Of course you have to be a “sudoer” (administrator) first $ sudo mysql mysql> CREATE DATABASE mybb; mysql> SHOW DATABASES; mysql> CREATE USER 'nonrootuser'@'localhost' IDENTIFIED BY 'password'; mysql> GRANT ALL PRIVILEGES ON mybb.* TO 'nonrootuser'@'localhost'; mysql> quit $ mysql -unonrootuser -ppassword mybb $ sudo mysql mysql> USE mybb; mysql> SHOW TABLES; mysql> quit 2. Install Ruby gems Checking the Gemfile in the current sources reveals that $ echo "gem 'mysql2', require: false" >> Gemfile is not really needed. It is enough to set the environment variable IMPORT to 1. What is needed though are development files for MySQL clients, which is what the first line below is about $ sudo apt-get install libmysqlclient-dev $ cd ~/discourse $ IMPORT=1 bundle install 2. Prepare Discourse (PostgreSQL database) $ bundle exec rails db:drop $ bundle exec rails db:create $ bundle exec rails db:migrate $ export DB_PW="password" $ export DB_USER="nonrootuser" 3. Execute the actual import The next line fixes a long deprecated and currently already removed method call in mybb.rb import script, which is still there at the time of writing and won’t change anything if this is already fixed $ sed -i.original 's/File.exists?/File.exist?/' script/import_scripts/mybb.rb Now check if Redis is still running. The Rails install script starts it but does not enable it as a permanent service so it doesn’t survive reboots, crashes, whatever, etc. $ ps -aux |grep redis silverdr 2808 0.3 0.3 89972 14512 ? Ssl 05:25 2:04 redis-server *:6379 […] If you don’t see anything like the line above run $ redis-server --daemonize yes which is the very same command the above Rails installation script used the first time when installing. Finally :pray: and $ IMPORT=1 bundle exec ruby script/import_scripts/mybb.rb If at this time the script didn’t stop with YAE (Yet Another Error) than it’s time to pop open that bottle :champagne: A few things remain OK - so the one obvious missing part are users’ passwords. Apparently, even though both applications store hash’n salt, judging by those hashes length “mybb” uses an older hashing algorithm. Therefore this is understandable and not a show-stopper. Everyone should be able to reset her password the first time. Some bbcode stuff does not get converted. I have for example problem with code blocks, which have some tags around them setting monospaced Courier font and whatnot. I have no more stamina to try to automate this thing further. If you manage to do something about it please let me / us here know! :man_bowing:

[image] Silver Dream !: undefined method exists?'` If I understand well, the method was deprecated then removed from current versions of Ruby: https://github.com/ruby/ruby/commit/bf97415c02b11a8949f715431aca9eeb6311add2 The import script should be updated to reflect this change. Maybe try replacing exists with exist without “s” here: script/import_scripts/mybb.rb main admin: user["group"] == "Administrators", avatar_url: avatar_url, post_create_action: proc do |newuser| if user["avatar"].present? avatar = user["avatar"].gsub(/\?.*/, "") if avatar.match(/^http.*/) UserAvatar.import_url_for_user(avatar, newuser) else filename = File.join(UPLOADS_DIR, avatar) @uploader.create_avatar(newuser, filename) if File.exist?(filename) end end end, } end end end def import_categories results = :slight_smile: Ruby doc: https://ruby-doc.org/3.2.2/File.html#method-c-exist-3F

Yeah - it’s been deprecated for ages before that. I’ll try to grep relevant occurrences out and change them but I need to take a break out of this lengthy and so far not highly rewarding exercise :wink:

Well… $ bundle exec ruby script/import_scripts/mybb.rb Loading existing groups... Loading existing users... Loading existing categories... Loading existing posts... Loading existing topics... /home/silverdr/sources/discourse/lib/site_setting_extension.rb:444:in `get': No setting named 'email_domains_blacklist' exists (Discourse::InvalidParameters)

Thank you. $ grep -R email_domains_blocklist ./ doesn’t return anything $ grep -R email_domains_blacklist ./ ./script/import_scripts/base.rb: email_domains_blacklist: '', ./app/models/site_setting.rb: email_domains_blacklist: "blocked_email_domains", returns as above. Meaning it’s most probably blocked_email_domains. OTOH I noticed that in previous attempts I replaced the original script/import_scripts/base.rb with the gist based one linked to above by @Paul_King: [image] Migrate a MyBB forum to Discourse Sysadmins In case it helps anyone, the developer @rahilqf I engaged completed the project including translation of custom MyBB user fields into Discourse custom user fields (which depends on having the multi-select-user-field plugin installed), MyBB post prefixes translated into Discourse tags, and stripping out of nearly all redundant MyCode tags from MyBB post text. His customized import script version is shared here - Custom MyBB to Discourse Import Script. He also successfully merged in a Yahoo Gro… I restored the original one back and it seems to have gone through this time. Too good to be true. I/It must have missed something :wink: Going to find out now

Migrating a myBB forum to Discourse using Kubuntu in a VM

Product Support Migration

pfaffman (Jay Pfaffman) April 8, 2023, 11:48am 5

You can find the new name in site settings. I think it’s email_domains_blocklist

Topic		Replies	Views
Mybb.rb imports nothing Migration mybb	26	4757	August 9, 2017
MyBB importer script failing at creating users stage Migration mybb	2	1687	September 29, 2015
How to use mybb.ru 2 import script? Migration mybb	6	1548	January 25, 2020
Need Help Merging MyBB Data into Discourse (Step-by-Step Process) Product Support	3	254	April 3, 2025
Members problem on importing Mybb to Discourse Migration mybb	25	3748	September 4, 2017

Migrating a myBB forum to Discourse using Kubuntu in a VM

Related topics