def field(self):
if not self.__field:<EOL><INDENT>default_field = inflection.underscore(self.__name)<EOL>if isinstance(self, orb.ReferenceColumn):<EOL><INDENT>default_field += '<STR_LIT>'<EOL><DEDENT>self.__field = default_field<EOL><DEDENT>return self.__field or default_field<EOL>
Returns the field name that this column will have inside the database.

:return     <str>