我在这里有一个奇怪的情况,知道为什么myapp_entry_tag
表的删除SQL正在执行两次?
>>> from myapp.models import Tag
>>> from django.db import connection
>>> from pprint import pprint
>>> Tag.objects.only('pk').get(pk=1).delete()
>>> pprint(connection.queries)
[{u'sql': u'SELECT `myapp_tag`.`id` FROM `myapp_tag` ''WHERE `myapp_tag`.`id` = 1 ',
u'time': u'0.000'},
{u'sql': u'DELETE FROM `myapp_entry_tag` WHERE `myapp_entry_tag`.`tag_id` IN (1)',
u'time': u'0.000'},
{u'sql': u'DELETE FROM `myapp_entry_tag` WHERE `myapp_entry_tag`.`tag_id` IN (1)',
u'time': u'0.000'},
{u'sql': u'DELETE FROM `myapp_tag` WHERE `id` IN (1)', u'time': u'0.000'}]
models.py:
class Tag(models.Model):
...
class EntryTag(models.Model):
...
tag = models.ForeignKey(Tag)
答案 0 :(得分:0)
(抱歉回答,但我无法评论你的问题)
使用django-toolbar获取查询执行的上下文。找到bug可能更容易。