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class AddLatestMergeRequestDiffIdToMergeRequests < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
disable_ddl_transaction!
def up
add_column :merge_requests, :latest_merge_request_diff_id, :integer
add_concurrent_index :merge_requests, :latest_merge_request_diff_id
add_concurrent_foreign_key :merge_requests, :merge_request_diffs,
column: :latest_merge_request_diff_id,
on_delete: :nullify
end
def down
remove_foreign_key :merge_requests, column: :latest_merge_request_diff_id
if index_exists?(:merge_requests, :latest_merge_request_diff_id)
remove_concurrent_index :merge_requests, :latest_merge_request_diff_id
end
remove_column :merge_requests, :latest_merge_request_diff_id
end
end
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