code: def verify_existence_and_get(id, table, name=None, get_id=False):
      
  
      where_clause = table.c.id == id
      if name:
          where_clause = table.c.name == name
  
      if 'state' in table.columns:
          where_clause = sql.and_(table.c.state != 'archived', where_clause)
  
      query = sql.select([table]).where(where_clause)
      result = flask.g.db_conn.execute(query).fetchone()
  
      if result is None:
          raise dci_exc.DCIException('Resource "%s" not found.' % id,
                                     status_code=404)
      if get_id:
          return result.id
      return result
docs: Verify the existence of a resource in the database and then
      return it if it exists, according to the condition, or raise an
      exception.
  
      :param id: id of the resource
      :param table: the table object
      :param name: the name of the row to look for
      :param get_id: if True, return only the ID
      :return: