apps.py 文件源码

def ready(self):
        query.QuerySet.format = format
        query.QuerySet.update = update
        query.QuerySet._update = _update
        if getattr(settings, 'ENABLE_ARRAY_M2M', False):
            datastructures.Join.as_sql = as_sql
            query.prefetch_one_level = prefetch_one_level
            pre_delete.connect(delete_reverse_related)