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# frozen_string_literal: true
class AddParentLinkUniqueWorkItemIndex < Gitlab::Database::Migration[2.0]
INDEX_NAME = 'index_work_item_parent_links_on_work_item_id'
OLD_INDEX_NAME = 'index_parent_links_on_work_item_id_and_work_item_parent_id'
disable_ddl_transaction!
def up
add_concurrent_index :work_item_parent_links, :work_item_id, unique: true, name: INDEX_NAME
remove_concurrent_index_by_name :work_item_parent_links, OLD_INDEX_NAME
end
def down
add_concurrent_index :work_item_parent_links, [:work_item_id, :work_item_parent_id],
unique: true, name: OLD_INDEX_NAME
remove_concurrent_index_by_name :work_item_parent_links, INDEX_NAME
end
end
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