Question

我对Django ORM有一个奇怪的问题。这里的Action对象的ID为1和6，但不能先获取id。它们都存在于数据库中。

In [17]: Action.objects.get(code='check_email').pk
Out[17]: 6L

In [18]: Action.objects.get(code='periodic_order_check').pk
Out[18]: 1L

In [19]: Action.objects.get(pk='6')
Out[19]: <Action: Check Email>

In [20]: Action.objects.get(pk='1')
---------------------------------------------------------------------------
DoesNotExist                              Traceback (most recent call last)
<ipython-input-20-728196789a45> in <module>()
----> 1 Action.objects.get(pk='1')

/home/vagrant/.pyenv/versions/vagrant/lib/python2.7/site-packages/django/db/models/manager.pyc in manager_method(self, *args, **kwargs)
    120         def create_method(name, method):
    121             def manager_method(self, *args, **kwargs):
--> 122                 return getattr(self.get_queryset(), name)(*args, **kwargs)
    123             manager_method.__name__ = method.__name__
    124             manager_method.__doc__ = method.__doc__

/home/vagrant/.pyenv/versions/vagrant/lib/python2.7/site-packages/cacheops/query.pyc in get(self, *args, **kwargs)
    351             qs = self
    352 
--> 353         return qs._no_monkey.get(qs, *args, **kwargs)
    354 
    355     def exists(self):

/home/vagrant/.pyenv/versions/vagrant/lib/python2.7/site-packages/django/db/models/query.pyc in get(self, *args, **kwargs)
    385             raise self.model.DoesNotExist(
    386                 "%s matching query does not exist." %
--> 387                 self.model._meta.object_name
    388             )
    389         raise self.model.MultipleObjectsReturned(

DoesNotExist: Action matching query does not exist.

Answer 1

我建议您使用

Action.objects.all().values()

检查所有值，看看你的get查询是否正确。由于您使用的字段是pk（前提是它是主键，而您尚未重新定义它），因此传递字符串＆＃39; 1＆＃39;反正不应该工作。检查模型和字段类型以及所有字段的值。

Django，匹配查询与现有数据库行不存在

1 个答案: