数据库在 QuerySet.dates() 中返回了无效值

Database returned an invalid value in QuerySet.dates()(数据库在 QuerySet.dates() 中返回了无效值)

问题描述

在我将一些 Wordpress 内容导入 Mezzanine 的 blog_blogpost 后，我​​在装有 mysql 5.5 的 Ubuntu 12.04 机器上收到此错误.

I get this error on my Ubuntu 12.04 machine with mysql 5.5 after I imported some Wordpress content to Mezzanine's blog_blogpost.

ValueError at /admin/blog/blogpost/
Database returned an invalid value in QuerySet.dates(). Are time zone definitions and pytz installed?

Request Method: GET
Request URL:    http://127.0.0.1:8000/admin/blog/blogpost/
Django Version: 1.6.1
Exception Type: ValueError
Exception Value:    
Database returned an invalid value in QuerySet.dates(). Are time zone definitions and pytz installed?
Exception Location: /home/me/.mezenv/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py in results_iter, line 1107
Python Executable:  /home/me/.mezenv/bin/python
Python Version: 2.7.3
Python Path:    
[u'/home/me',
 '/home/me/sai',
 '/home/me/.mezenv/local/lib/python2.7/site-packages/distribute-0.6.24-py2.7.egg',
 '/home/me/.mezenv/local/lib/python2.7/site-packages/pip-1.1-py2.7.egg',
 '/home/me/.mezenv/lib/python2.7',
 '/home/me/.mezenv/lib/python2.7/plat-linux2',
 '/home/me/.mezenv/lib/python2.7/lib-tk',
 '/home/me/.mezenv/lib/python2.7/lib-old',
 '/home/me/.mezenv/lib/python2.7/lib-dynload',
 '/usr/lib/python2.7',
 '/usr/lib/python2.7/plat-linux2',
 '/usr/lib/python2.7/lib-tk',
 '/home/me/.mezenv/local/lib/python2.7/site-packages']
Server time:    Sat, 25 Jan 2014 13:44:11 +0100


Error during template rendering

In template /home/me/.mezenv/local/lib/python2.7/site-packages/grappelli_safe/templates/admin/change_list.html, error at line 140

我添加到我的 local_settings.py

I added to my local_settings.py

import pytz
from pytz import *

并且还在 my.cnf [mysqld] 中定义了时区

and also defined timezone in my.cnf [mysqld]

default-time-zone = "+01:00"

但我仍然得到错误单元我在模板中得到了这一行:

but I still get the error unitl I get the line in template:

标签是:

140 {% block date_hierarchy %}{% date_hierarchy cl %}{% endblock %}

140 {% block date_hierarchy %}{% date_hierarchy cl %}{% endblock %}

感谢您帮助解决问题.

推荐答案

看起来是错误引起的 Django 1.6 时区功能变化.文档现在特别提到了这个错误(错误报告，链接到文档).

Looks like error caused Django's 1.6 timezone functionality changes. The docs now mention this error specifically (bug report, link to docs).

您必须将时区表加载到 mysql (http://dev.mysql.com/doc/refman/5.6/en/mysql-tzinfo-to-sql.html).尝试在您的数据库服务器上执行:

You have to load timezone tables into mysql (http://dev.mysql.com/doc/refman/5.6/en/mysql-tzinfo-to-sql.html). Try execute on your database server:

mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -D mysql -u root -p 

然后运行刷新表"或刷新查询缓存"，否则即使加载了正确的时区数据，问题也可能不会消失:

And then run "flush tables" or "flush query cache", otherwise the problem may not disappear even though you've loaded the correct timezone data:

mysql -u root -p -e "flush tables;" mysql 

由@qris 更新

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