fields.py 文件源码

def _check_columns_attribute(self, textual_columns):
        if not self.columns:
            return
        if not textual_columns:
            yield checks.Error(
                "No textual columns available in this model for search vector indexing.",
                obj=self, id='postgres.E100',
            )
        elif not is_iterable(self.columns) or \
                not all(isinstance(wc, WeightedColumn) for wc in self.columns):
            yield checks.Error(
                "'columns' must be an iterable containing WeightedColumn instances",
                obj=self, id='postgres.E101',
            )
        else:
            for column in self.columns:
                for error in column.check(self, textual_columns):
                    yield error