database cleaner multiple connections single orm outside of rails

gistfile1.rb

RSpec.configure do |config|
  
  config.before(:suite) do
    ActiveRecord::Base.establish_connection database['one']
    DatabaseCleaner.strategy = :deletion
    ActiveRecord::Base.establish_connection config.database['two']
    DatabaseCleaner.strategy = :deletion
  end

  config.before(:each) do
    ActiveRecord::Base.establish_connection database['one']
    DatabaseCleaner.start
    ActiveRecord::Base.establish_connection database['two']
    DatabaseCleaner.start
  end

  config.after(:each) do
    ActiveRecord::Base.establish_connection database['one']
    DatabaseCleaner.clean
    ActiveRecord::Base.establish_connection database['two']
    DatabaseCleaner.clean
 end

Thanks you so much! It didn't work out of the box for me, but it did after a bit of tweaking. BTW, this still works in recent (4.2.5.1) versions of Rails/DBCleaner.

# Double db config
other_db = Rails.configuration.database_configuration["other_#{Rails.env}"]
current_db = Rails.configuration.database_configuration[Rails.env]

# Truncate the db, track the transaction for the current test
config.before(:suite) do
  ActiveRecord::Base.establish_connection other_db
  DatabaseCleaner.strategy = :deletion
  ActiveRecord::Base.establish_connection current_db
  DatabaseCleaner.strategy = :deletion
end

config.before(:each) do
  ActiveRecord::Base.establish_connection other_db
  DatabaseCleaner.start
  ActiveRecord::Base.establish_connection current_db
  DatabaseCleaner.start
end

config.after(:each) do
  ActiveRecord::Base.establish_connection other_db
  DatabaseCleaner.clean_with(:deletion)
  ActiveRecord::Base.establish_connection current_db
  DatabaseCleaner.clean_with(:deletion)
end

@ggalindezb Works for me!

this does not work for me (version 1.5.0). I have to do the following

DatabaseCleaner.add_cleaner :active_record, model: ActiveRecord::Base
DatabaseCleaner.add_cleaner :active_record, model: Notification

ActiveRecord::Base is using the default database.yml while Notification is connecting to a different database

@mgreenly it works for me. Stack:
rails 5.2.1
database_cleaner 1.7.0
rspec 3.7.1

Thank you! 👍

@luongm Worked like a charm!!!

@luongm solution is what worked for me, as well:
rails 6.0.2.1
database_cleaner 1.8.3
rspec 3.9.0

Worth mentioning:

Calling `DatabaseCleaner.add_cleaner` is deprecated, and will be removed in database_cleaner 2.0. Use `DatabaseCleaner.[]`, instead.

So, I did:

    DatabaseCleaner.[] :active_record, model: ActiveRecord::Base
    DatabaseCleaner.[] :active_record, model: SomeSpecificModel