def get_relation_cols(self):
retlst = []<EOL>for flt, value in zip(self.filters, self.values):<EOL><INDENT>if isinstance(flt, FilterRelation) and value:<EOL><INDENT>retlst.append(flt.column_name)<EOL><DEDENT><DEDENT>return retlst<EOL>
Returns the filter active FilterRelation cols