Django无法保存与User表相关的数据。 它说它没有`mymodel_set`属性

Question

I have a model linked to Django User model but when I try saving to that model using User instance, it says 'User' object has no attribute 'mymodel_set'

My models.py:

from django.contrib.auth.models import User
from django.db import models

class MyModel(models.Model):
    user = models.OneToOneField(User, blank=True, null=True, related_name='mymodel')
    name = models.CharField(max_length=14, blank=True, null=True)

My views.py:

from django.contrib.auth.models import User
from myapp.models import mymodel

def register(request):
    #gets data here from template
    user = User(username=reg_username, password=reg_password)
    user.save()
    user.mymodel_set.create(name= display_name)
    return HttpResponse('Success')

Answer 1

If the related object existed, you would use mymodel , but it does not exist and the relationship is void, so it cannot be accessed via the user . Create it first and set the relationship to that user:

mymodel = MyModel.objects.create(name=display_name, user=user)
#                                                   ^^^^ set related user

The _set suffix is usually used for reverse ForeignKey relationships and not for OneToOne relationships.

Also note that the related_name on the user field was already specified as mymodel , and the related field can now be accessed from the User model via user.mymodel