似乎Django默认情况下会向查询添加ORDER BY
。我可以清除吗?
from slowstagram.models import InstagramMedia
print InstagramMedia.objects.filter().query
SELECT
`slowstagram_instagrammedia`.`id`,
`slowstagram_instagrammedia`.`user_id`,
`slowstagram_instagrammedia`.`image_url`,
`slowstagram_instagrammedia`.`video_url`,
`slowstagram_instagrammedia`.`created_time`,
`slowstagram_instagrammedia`.`caption`,
`slowstagram_instagrammedia`.`filter`,
`slowstagram_instagrammedia`.`link`,
`slowstagram_instagrammedia`.`attribution_id`,
`slowstagram_instagrammedia`.`likes_count`,
`slowstagram_instagrammedia`.`type`
FROM
`slowstagram_instagrammedia`
ORDER BY
`slowstagram_instagrammedia`.`id`
ASC
```
答案 0 :(得分:23)
实际上,只需query.order_by()
即可。
以下是order_by
的实施,供您参考 -
def order_by(self, *field_names):
"""
Returns a new QuerySet instance with the ordering changed.
"""
assert self.query.can_filter(), \
"Cannot reorder a query once a slice has been taken."
obj = self._clone()
obj.query.clear_ordering(force_empty=False)
obj.query.add_ordering(*field_names)
return obj
答案 1 :(得分:5)
您可以使用查询
中的clear_ordering
方法
"""Removes any ordering settings.
If 'force_empty' is True, there will be no ordering in the resulting
query (not even the model's default).
"""
示例:
>>> from products.models import Product
>>> products = Product.objects.filter(shortdesc='falda').order_by('id')
>>> print products.query
SELECT "products_product"."id", "products_product"."shortdesc"
WHERE "products_product"."shortdesc" = falda
ORDER BY "products_product"."id" ASC
>>> products.query.clear_ordering()
>>> print products.query
SELECT "products_product"."id", "products_product"."shortdesc"
WHERE "products_product"."shortdesc" = falda
答案 2 :(得分:0)
尝试在查询集末尾使用.order_by('?')
。