复制/克隆一条查询结果，并将它插入到数据库中：
将 pk 值设为 None 即可：
blog = Blog(name='My blog', tagline='Blogging is easy') blog.save() # post.pk == 1 blog.pk = None blog.save() # post.pk == 2
如果该 model 继承于另一个 model 的话，必须将 pk 和 id 的值都设为 None:
class ThemeBlog(Blog): theme = models.CharField(max_length=200) django_blog ...
本文假设读者已经知道如何编写基本的装饰器代码，否则请自行 google：“python 装饰器”and/or “python decorator”。
from functools import wraps def object_does_not_exist(func): @wraps(func) def returned_wrapper(request, *args, **kwargs): try: return func(request, *args, **kwargs) except ObjectDoesNotExist: raise Http404() return returned_wrapper
用法：
@object_does_not_exist def detail(request): pass
第一种写法：
def object_does_not_exist(redirect=None): def decorator ...
错误详情：
# m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf *** ERROR: FEATURE() should be before MAILER() *** MAILER(`local') must appear after FEATURE(`always_add_domain')*** ERROR: FEATURE() should be before MAILER() *** MAILER(`local') must appear after FEATURE(`allmasquerade')*** ERROR: FEATURE() should be before MAILER()
解决办法：
按照提示，编辑 /etc/mail/sendmail.mc 文件 ...
more ...将 django 项目部署到服务器后，访问 admin 时出现如下错误：
DoesNotExist at /admin/ Site matching query does not exist.
上网搜索后，参考 http://stackoverflow.com/questions/9736975/django-admin-doesnotexist-at-admin 修复了该问题，下面记录一下解决过程。
两种解决办法：
第一种办法是：编辑 settings.py 文件，从 INSTALLED_APPS 配置项中移除 'django.contrib.sites',。
第二种办法：通过 python manage.py shell 为 Site model 添加一条记录（将网站的域名添加进去）：
$ python manage ...错误信息如下：
You just installed Django's auth system, which means you don't have any superusers defined. Would you like to create one now? (yes/no): yes Traceback (most recent call last): File "manage.py", line 10, in <module> execute_from_command_line(sys.argv) File "/usr/local/lib/python2.7/dist-packages/django ...