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# frozen_string_literal: true
# rubocop:disable Style/Documentation
module Gitlab
module BackgroundMigration
module UserMentions
class CreateResourceUserMention
# Resources that have mentions to be migrated:
# issue, merge_request, epic, commit, snippet, design
BULK_INSERT_SIZE = 1_000
ISOLATION_MODULE = 'Gitlab::BackgroundMigration::UserMentions::Models'
def perform(resource_model, join, conditions, with_notes, start_id, end_id)
return unless Feature.enabled?(:migrate_user_mentions, default_enabled: true)
resource_model = "#{ISOLATION_MODULE}::#{resource_model}".constantize if resource_model.is_a?(String)
model = with_notes ? Gitlab::BackgroundMigration::UserMentions::Models::Note : resource_model
resource_user_mention_model = resource_model.user_mention_model
records = model.joins(join).where(conditions).where(id: start_id..end_id)
records.each_batch(of: BULK_INSERT_SIZE) do |records|
mentions = []
records.each do |record|
mention_record = record.build_mention_values(resource_user_mention_model.resource_foreign_key)
mentions << mention_record unless mention_record.blank?
end
resource_user_mention_model.insert_all(mentions) unless mentions.empty?
end
end
end
end
end
end
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