28 lines
792 B
Ruby
28 lines
792 B
Ruby
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# frozen_string_literal: true
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class AddDuplicatedToToIssue < ActiveRecord::Migration[5.2]
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = false
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disable_ddl_transaction!
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def up
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add_column :issues, :duplicated_to_id, :integer unless duplicated_to_id_exists?
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add_concurrent_foreign_key :issues, :issues, column: :duplicated_to_id, on_delete: :nullify
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add_concurrent_index :issues, :duplicated_to_id, where: 'duplicated_to_id IS NOT NULL'
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end
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def down
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remove_foreign_key_without_error(:issues, column: :duplicated_to_id)
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remove_concurrent_index(:issues, :duplicated_to_id)
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remove_column(:issues, :duplicated_to_id) if duplicated_to_id_exists?
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end
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private
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def duplicated_to_id_exists?
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column_exists?(:issues, :duplicated_to_id)
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end
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end
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