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# frozen_string_literal: true
class MigrateCommitNotesMentionsToDb < ActiveRecord::Migration[5.2]
include Gitlab::Database::MigrationHelpers
disable_ddl_transaction!
DOWNTIME = false
DELAY = 3.minutes.to_i
BATCH_SIZE = 1_000
MIGRATION = 'UserMentions::CreateResourceUserMention'
QUERY_CONDITIONS = "note LIKE '%@%'::text AND notes.noteable_type = 'Commit' AND commit_user_mentions.commit_id IS NULL"
JOIN = 'LEFT JOIN commit_user_mentions ON notes.id = commit_user_mentions.note_id'
class Note < ActiveRecord::Base
include EachBatch
self.table_name = 'notes'
end
def up
Note
.joins(JOIN)
.where(QUERY_CONDITIONS)
.each_batch(of: BATCH_SIZE) do |batch, index|
range = batch.pluck(Arel.sql('MIN(notes.id)'), Arel.sql('MAX(notes.id)')).first
migrate_in(index * DELAY, MIGRATION, ['Commit', JOIN, QUERY_CONDITIONS, true, *range])
end
end
def down
# no-op
# temporary index is to be dropped in a different migration in an upcoming release:
# https://gitlab.com/gitlab-org/gitlab/issues/196842
end
end
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