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# frozen_string_literal: true
module Gitlab
module BackgroundMigration
# Fixes notes with NULL discussion_ids due to a bug when importing from GitHub
# Bug was fixed in https://gitlab.com/gitlab-org/gitlab/-/merge_requests/76517
class BackfillNoteDiscussionId
SUB_BATCH_SIZE = 300
# Migration only version of notes model
class Note < ApplicationRecord
include EachBatch
self.table_name = 'notes'
# Based on https://gitlab.com/gitlab-org/gitlab/blob/117c14d0c79403e169cf52922b48f69d1dcf6a85/app/models/discussion.rb#L62-74
def generate_discussion_id
Digest::SHA1.hexdigest(
[:discussion, noteable_type.try(:underscore), noteable_id || commit_id, SecureRandom.hex].join('-')
)
end
end
def perform(start_id, stop_id)
notes = Note.select(:id, :noteable_type, :noteable_id, :commit_id)
.where(discussion_id: nil, id: start_id..stop_id)
notes.each_batch(of: SUB_BATCH_SIZE) do |relation|
update_discussion_ids(relation)
end
end
private
def update_discussion_ids(notes)
mapping = notes.each_with_object({}) do |note, hash|
hash[note] = { discussion_id: note.generate_discussion_id }
end
Gitlab::Database::BulkUpdate.execute(%i(discussion_id), mapping)
end
end
end
end
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