20170703102400_add_stage_id_foreign_key_to_builds.rb 711 Bytes
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class AddStageIdForeignKeyToBuilds < ActiveRecord::Migration[4.2]
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  include Gitlab::Database::MigrationHelpers

  DOWNTIME = false

  disable_ddl_transaction!

  def up
    unless index_exists?(:ci_builds, :stage_id)
      add_concurrent_index(:ci_builds, :stage_id)
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    end

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    unless foreign_key_exists?(:ci_builds, :ci_stages, column: :stage_id)
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      add_concurrent_foreign_key(:ci_builds, :ci_stages, column: :stage_id, on_delete: :cascade)
    end
  end

  def down
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    if foreign_key_exists?(:ci_builds, column: :stage_id)
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      remove_foreign_key(:ci_builds, column: :stage_id)
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    end

    if index_exists?(:ci_builds, :stage_id)
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      remove_concurrent_index(:ci_builds, :stage_id)
    end
  end
end