alter_table(:metadata_rights_declaration) do
      add_foreign_key([:accession_id], :accession, :key => :id)
      add_foreign_key([:resource_id], :resource, :key => :id)
      add_foreign_key([:digital_object_id], :digital_object, :key => :id)
      add_foreign_key([:agent_person_id], :agent_person, :key => :id)