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# frozen_string_literal: true
module Gitlab
module BackgroundMigration
# It seeks duplicate npm packages and mark them for destruction
class MarkDuplicateNpmPackagesForDestruction < BatchedMigrationJob
NPM_PACKAGE_TYPE = 2
PENDING_DESTRUCTION_STATUS = 4
operation_name :update_all
feature_category :package_registry
# Temporary class to link AR model to the `packages_packages` table
class Package < ::ApplicationRecord
include EachBatch
self.table_name = 'packages_packages'
end
def perform
distinct_each_batch do |batch|
project_ids = batch.pluck(:project_id)
subquery = Package
.where(project_id: project_ids, package_type: NPM_PACKAGE_TYPE)
.where.not(status: PENDING_DESTRUCTION_STATUS)
.select('project_id, name, version, MAX(id) AS max_id')
.group(:project_id, :name, :version)
.having('COUNT(*) > 1')
join_query = <<~SQL.squish
INNER JOIN (#{subquery.to_sql}) AS duplicates
ON packages_packages.project_id = duplicates.project_id
AND packages_packages.name = duplicates.name
AND packages_packages.version = duplicates.version
SQL
Package
.joins(join_query)
.where.not('packages_packages.id = duplicates.max_id')
.each_batch do |batch_to_update|
batch_to_update.update_all(status: PENDING_DESTRUCTION_STATUS)
end
end
end
end
end
end
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