Question

请帮忙

我正在使用django 2.1.4设计博客应用程序。实际上，我遵循的是使用django 1.8的安东尼奥·梅尔（antonio mele）的“ Django示例”一书中的说明。但是，在创建应用程序并添加博客模型之后，我尝试为新模型应用迁移，但收到此错误消息。

Traceback (most recent call last):
  File "manage.py", line 15, in <module>
    execute_from_command_line(sys.argv)
  File "C:\Users\public\django\my_env\lib\site-packages\django\core\management\__init__.py", line 381, in execute_from_c
ommand_line
    utility.execute()
  File "C:\Users\public\django\my_env\lib\site-packages\django\core\management\__init__.py", line 357, in execute
    django.setup()
  File "C:\Users\public\django\my_env\lib\site-packages\django\__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "C:\Users\public\django\my_env\lib\site-packages\django\apps\registry.py", line 112, in populate
    app_config.import_models()
  File "C:\Users\public\django\my_env\lib\site-packages\django\apps\config.py", line 198, in import_models
    self.models_module = import_module(models_module_name)
  File "C:\Users\public\django\my_env\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "C:\Users\public\django\mysite\blog\models.py", line 14, in <module>
    related_name='blog_posts')
TypeError: __init__() missing 1 required positional argument: 'on_delete'

@伊曼纽尔..这是models.py文件上的完整代码

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

class Post(models.Model):
    STATUS_CHOICES = (
        ('draft', 'Draft'),
        ('published', 'Published'),
)
title = models.CharField(max_length=250)
slug = models.SlugField(max_length=250,
                        unique_for_date='publish')
author = models.ForeignKey(User,
                           related_name='blog_posts')
body = models.TextField()
publish = models.DateTimeField(default=timezone.now)
created = models.DateTimeField(auto_now_add=True)
updated = models.DateTimeField(auto_now=True)
status = models.CharField(max_length=10,
                        choices=STATUS_CHOICES,
                        default='draft')
class Meta:
    ordering = ('-publish',)

def __str__(self):
    return self.title

我无法在Django 2.1.4中进行应用程序的迁移

0 个答案: