Django 与用户的一对一关系不使用查询

Question

My model is like this

class Profile(models.Model):
    user = models.OneToOneField(User,default=None,null=True,on_delete=models.CASCADE)
    name = models.CharField(max_length=50,null=True)

i am trying to get through models using shell but getting the empty query. I tried this

>>> u1=User.objects.get(username='gautam')
>>>u1
<User: gautam> 
>>> Profile.objects.get(user=u1)
Traceback (most recent call last):
File "/usr/lib/python3.6/code.py", line 91, in runcode
exec(code, self.locals)
File "<console>", line 1, in <module>
File "/home/gautam/.local/lib/python3.6/site- 
packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/home/gautam/.local/lib/python3.6/site- 
packages/django/db/models/query.py", line 399, in get
self.model._meta.object_name
homes_login.models.DoesNotExist: Profile matching query does not 
exist.

I am tring to get the user for that profile.

Answer 1

This profile is simply not created. Setting an OneToOne relation doesn't guarantee that profile will exist for each user. To overcome that, you should simply create new profile, like this:

>>> Profile.objects.create(user=u1)

To automate process of getting existing profile or creating new one, you can use get_or_create method.