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# frozen_string_literal: true
module Gitlab
module BackgroundMigration
# The class to extract the project topics into a separate `topics` table
class ExtractProjectTopicsIntoSeparateTable
# Temporary AR table for tags
class Tag < ActiveRecord::Base
self.table_name = 'tags'
end
# Temporary AR table for taggings
class Tagging < ActiveRecord::Base
self.table_name = 'taggings'
belongs_to :tag
end
# Temporary AR table for topics
class Topic < ActiveRecord::Base
self.table_name = 'topics'
end
# Temporary AR table for project topics
class ProjectTopic < ActiveRecord::Base
self.table_name = 'project_topics'
belongs_to :topic
end
# Temporary AR table for projects
class Project < ActiveRecord::Base
self.table_name = 'projects'
end
def perform(start_id, stop_id)
Tagging.includes(:tag).where(taggable_type: 'Project', id: start_id..stop_id).each do |tagging|
if Project.exists?(id: tagging.taggable_id) && tagging.tag
begin
topic = Topic.find_or_create_by(name: tagging.tag.name)
project_topic = ProjectTopic.find_or_create_by(project_id: tagging.taggable_id, topic: topic)
tagging.delete if project_topic.persisted?
rescue StandardError => e
Gitlab::ErrorTracking.log_exception(e, tagging_id: tagging.id)
end
else
tagging.delete
end
end
mark_job_as_succeeded(start_id, stop_id)
end
private
def mark_job_as_succeeded(*arguments)
Gitlab::Database::BackgroundMigrationJob.mark_all_as_succeeded(
self.class.name.demodulize,
arguments
)
end
end
end
end
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