TypeError：__init__（）缺少1个必需的位置参数：'on_delete'我该如何解决这个问题

Question

Python 3.8.1 django 版本 3.0.3 当我运行此代码时，我收到此错误 TypeError: __init__() 缺少 1 个必需的位置参数：'on_delete'

Models.py

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

# Create your models here.

class UserProfileInfo(models.Model):

    user = models.OneToOneField(User)

    #additional
    profile_site = models.URLField(blank = True)

    profile_pic = models.ImageField(upload_to = 'profile_pics', blank = True)

    def __str__(self):
        return self.user.username

forms.py

from django import forms
from django.contrib.auth.models import User
from basic_app.models import UserProfileInfo

class UserForm(forms.ModelForm):
    password = forms.CharField(widget = forms.PasswordInput())

    class meta():
        model = User
        fields = ('username', 'email', 'password')

class UserProfileInfo(forms.ModelForm):
    class meta():
        model = UserProfileInfo
        fields = ('profile_site', 'profile_pic')

Answer 1

您为OneToOneField 的on_delete=… parameter [Django-doc] 添加一个值。这指定了当目标对象（这里是User）被删除时要做什么。例如，我们可以指定一个CASCADE：

class UserProfileInfo(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    profile_site = models.URLField(blank = True)
    profile_pic = models.ImageField(upload_to='profile_pics', blank=True)

    def __str__(self):
        return self.user.username

请阅读文档以确定您要使用的触发器。