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# frozen_string_literal: true
module Gitlab
module BackgroundMigration
# Iterates through the namespaces table and attempts to set the
# opposite of the value of the column "emails_disabled" to a new
# column in namespace_settings called emails_enabled
class AddNamespacesEmailsEnabledColumnData < BatchedMigrationJob
feature_category :database
operation_name :add_namespaces_emails_enabled_column_data
# Targeted table
class NamespaceSetting < ApplicationRecord
self.table_name = 'namespace_settings'
end
def perform
each_sub_batch do |sub_batch|
plucked_list = sub_batch.where('NOT emails_disabled IS NULL').pluck(:id, :emails_disabled)
next if plucked_list.empty?
ApplicationRecord.connection.execute <<~SQL
UPDATE namespace_settings
SET emails_enabled= NOT subquery.emails_enabled
FROM (SELECT * FROM (#{Arel::Nodes::ValuesList.new(plucked_list).to_sql}) AS updates(namespace_id, emails_enabled)) AS subquery
WHERE namespace_settings.namespace_id=subquery.namespace_id
SQL
end
end
end
end
end
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