code: def _create_relationship(manager, handle_id, other_handle_id, rel_type, legacy=True):
      
  
      q = """
          MATCH (a:Node {handle_id: {start}}),(b:Node {handle_id: {end}})
          CREATE (a)-[r:%s]->(b)
          RETURN r
          """ % rel_type
  
      with manager.session as s:
          if legacy:
              return s.run(q, {'start': handle_id, 'end': other_handle_id}).single()['r'].id
          return s.run(q, {'start': handle_id, 'end': other_handle_id}).single()['r']
docs: :param manager: Context manager to handle transactions
      :param handle_id: Node handle id
      :param other_handle_id: Other node handle id
      :param rel_type: Relationship type
      :param legacy: Backwards compatibility
  
      :type manager: Neo4jDBSessionManager
      :type handle_id: str|unicode
      :type other_handle_id: str|unicode
      :type rel_type: str|unicode
      :type legacy: Boolean
  
      :rtype: int|neo4j.v1.types.Relationship