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# frozen_string_literal: true
module Database
module MultipleDatabases
def skip_if_multiple_databases_not_setup
skip 'Skipping because multiple databases not set up' unless Gitlab::Database.has_config?(:ci)
end
# The usage of this method switches temporarily used `connection_handler`
# allowing full manipulation of ActiveRecord::Base connections without
# having side effects like:
# - misaligned transactions since this is managed by `BeforeAllAdapter`
# - removal of primary connections
#
# The execution within a block ensures safe cleanup of all allocated resources.
#
# rubocop:disable Database/MultipleDatabases
def with_reestablished_active_record_base(reconnect: true)
connection_classes = ActiveRecord::Base.connection_handler.connection_pool_names.map(&:constantize).to_h do |klass|
[klass, klass.connection_db_config]
end
original_handler = ActiveRecord::Base.connection_handler
new_handler = ActiveRecord::ConnectionAdapters::ConnectionHandler.new
ActiveRecord::Base.connection_handler = new_handler
if reconnect
connection_classes.each { |klass, db_config| klass.establish_connection(db_config) }
end
yield
ensure
ActiveRecord::Base.connection_handler = original_handler
new_handler&.clear_all_connections!
end
# rubocop:enable Database/MultipleDatabases
end
module ActiveRecordBaseEstablishConnection
def establish_connection(*args)
# rubocop:disable Database/MultipleDatabases
if connected? && connection&.transaction_open? && ActiveRecord::Base.connection_handler == ActiveRecord::Base.default_connection_handler
raise "Cannot re-establish '#{self}.establish_connection' within an open transaction (#{connection&.open_transactions.to_i}). " \
"Use `with_reestablished_active_record_base` instead or add `:reestablished_active_record_base` to rspec context."
end
# rubocop:enable Database/MultipleDatabases
super
end
end
end
RSpec.configure do |config|
config.around(:each, :reestablished_active_record_base) do |example|
with_reestablished_active_record_base(reconnect: example.metadata.fetch(:reconnect, true)) do
example.run
end
end
end
ActiveRecord::Base.singleton_class.prepend(::Database::ActiveRecordBaseEstablishConnection) # rubocop:disable Database/MultipleDatabases
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