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# frozen_string_literal: true
module Gitlab
module BackgroundMigration
# Iterates through the Projects table and attempts to set the
# opposite of the value of the column "emails_disabled" to a new
# column in project_settings called emails_enabled
class AddProjectsEmailsEnabledColumnData < BatchedMigrationJob
feature_category :database
operation_name :add_projects_emails_enabled_column_data
# Targeted table
class ProjectSetting < ApplicationRecord
self.table_name = 'project_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 project_settings
SET emails_enabled=NOT subquery.emails_enabled
FROM (SELECT * FROM (#{Arel::Nodes::ValuesList.new(plucked_list).to_sql}) AS updates(project_id, emails_enabled)) AS subquery
WHERE project_settings.project_id=subquery.project_id
SQL
end
end
end
end
end
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