On 22 touko, 18:57, Michael <mich...@d3i.com> wrote:
> I've got an odd situation here, any idea why the delete SQL for the
> `myapp_entry_tag` table is being performed twice?
>
> >>> 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)
The answer is: this should not happen, and I wasn't able to reproduce
this using Django master.
What version of Django is this? Could it be that you have some custom
code running (signal handlers for example)? Can you produce a small
self-contained Django project where this happens?
- Anssi
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