def _add_fluent_indexes(self):
        """
        Add the index commands fluently specified on columns:
        """
        for column in self._columns:
            for index in ['primary', 'unique', 'index']:
                column_index = column.get(index)

                if column_index is True:
                    getattr(self, index)(column.name)

                    break
                elif column_index:
                    getattr(self, index)(column.name, column_index)

                    break
Add the index commands fluently specified on columns: