models.py 文件源码

def annotate_most_recent_scan_error_count(self) -> 'ScanListQuerySet':
        return self.annotate(
            last_scan__error_count=RawSQL('''
                SELECT COUNT("id")
                FROM "{ScanError}"
                WHERE
                    "{ScanError}"."scan_id" = "{Site}"."last_scan_id"
                '''.format(
                    Scan=Scan._meta.db_table,
                    Site=Site._meta.db_table,
                    ScanError=ScanError._meta.db_table), ()))