1
我最近使用Jython啓動了一個Django項目。我創建了一個virtualenv並使用SQLite的JDBC文件（sqlite-jdbc-3.8.11.2）成功創建了一個Django 1.8.6項目。Django unicode問題Jython中的datetime與SQLite JDBC
我可以創建一個超級用戶jython manage.py createsuperuser，加載管理網址併成功登錄。我甚至可以從管理員創建另一個用戶。我試圖編輯用戶時出現問題。服務器無法呈現用戶模型的詳細實例的模板。
我沒有安裝任何外部應用程序，也沒有在項目中創建應用程序。我爲用戶模型和Django管理員默認界面使用django.contrib.auth。
最初的錯誤，我得到當我加載/admin/auth/user/1/是'unicode' object has no attribute 'tzinfo'：
AttributeError at /admin/auth/user/1/
'unicode' object has no attribute 'tzinfo'
Request Method: GET
Request URL: http://localhost:8000/admin/auth/user/1/
Django Version: 1.8.6
Exception Type: AttributeError
Exception Value:
'unicode' object has no attribute 'tzinfo'
Exception Location: /home/dmunoz/jsnmp/Lib/site-packages/django/utils/timezone.py in is_aware, line 337
Python Executable: /home/dmunoz/jsnmp/bin/jython
Python Version: 2.7.0
Python Path:
['/home/dmunoz/snmp/webswitcher',
'/home/dmunoz/jsnmp/Lib/site-packages/django_jython-1.8.0b3-py2.7.egg',
'/home/dmunoz/jsnmp/Lib/site-packages',
'/home/dmunoz/jsnmp/Lib',
'/home/dmunoz/opt/jython2.7.0/Lib',
'__classpath__',
'__pyclasspath__/']
Server time: Tue, 10 Nov 2015 12:31:09 -0300
Error during template rendering
In template /home/dmunoz/jsnmp/Lib/site-packages/django/contrib/admin/templates/admin/includes/fieldset.html, error at line 19
正因爲如此，我試圖在settings.py文件設置USE_TZ = False。然後，我得到'unicode' object has no attribute 'date'：
AttributeError at /admin/auth/user/1/
'unicode' object has no attribute 'date'
Request Method: GET
Request URL: http://localhost:8000/admin/auth/user/1/
Django Version: 1.8.6
Exception Type: AttributeError
Exception Value:
'unicode' object has no attribute 'date'
Exception Location: /home/dmunoz/jsnmp/Lib/site-packages/django/forms/widgets.py in decompress, line 888
Python Executable: /home/dmunoz/jsnmp/bin/jython
Python Version: 2.7.0
Python Path:
['/home/dmunoz/snmp/webswitcher',
'/home/dmunoz/jsnmp/Lib/site-packages/django_jython-1.8.0b3-py2.7.egg',
'/home/dmunoz/jsnmp/Lib/site-packages',
'/home/dmunoz/jsnmp/Lib',
'/home/dmunoz/opt/jython2.7.0/Lib',
'__classpath__',
'__pyclasspath__/']
Server time: Tue, 10 Nov 2015 12:28:18 -0300
Error during template rendering
In template /home/dmunoz/jsnmp/Lib/site-packages/django/contrib/admin/templates/admin/includes/fieldset.html, error at line 19
最後的錯誤，我已經得到的是，當我試圖用jython manage.py dumpdata auth.User --indent=4 --traceback轉儲從auth.User模型中的數據：
[Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/home/dmunoz/jsnmp/Lib/site-packages/django/core/management/__init__.py", line 354, in execute_from_command_line
utility.execute()
File "/home/dmunoz/jsnmp/Lib/site-packages/django/core/management/__init__.py", line 346, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/dmunoz/jsnmp/Lib/site-packages/django/core/management/base.py", line 394, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/dmunoz/jsnmp/Lib/site-packages/django/core/management/base.py", line 445, in execute
output = self.handle(*args, **options)
File "/home/dmunoz/jsnmp/Lib/site-packages/django/core/management/commands/dumpdata.py", line 159, in handle
serializers.serialize(format, get_objects(), indent=indent,
File "/home/dmunoz/jsnmp/Lib/site-packages/django/core/serializers/__init__.py", line 129, in serialize
s.serialize(queryset, **options)
File "/home/dmunoz/jsnmp/Lib/site-packages/django/core/serializers/base.py", line 61, in serialize
self.handle_field(obj, field)
File "/home/dmunoz/jsnmp/Lib/site-packages/django/core/serializers/python.py", line 55, in handle_field
self._current[field.name] = field.value_to_string(obj)
File "/home/dmunoz/jsnmp/Lib/site-packages/django/db/models/fields/__init__.py", line 1487, in value_to_string
return '' if val is None else val.isoformat()
AttributeError: 'unicode' object has no attribute 'isoformat'
Python版本：2.7.0， Jython的版本：2.7.0， Django的版本：1.8.6， Django的Jython的版本：1.8.0b3， SQLITE JDBC版本：3.8.11.2
編輯：
我創建了一個Django應用程序，用一個簡單的模型：
from django.db import models
class PMV(models.Model):
creation_date = models.DateField()
我在管理網頁=今天創建一個實例，與日期。當我試圖編輯它，我得到這個：
在此之後，我添加了一個models.DateTimeField()到PMV模型，創建一個實例，並試圖對其進行編輯。我再次得到了'unicode' object has no attribute 'tzinfo'錯誤。
看起來你有一個字符串（'unicode'）對象，其中'datetime.datetime'對象是預期的。 –
你建議我做什麼？因爲這個錯誤發生在默認的Django管理模型中。我應該嘗試使用另一個JDBC，重寫auth.User模型還是嘗試其他方法？ – DMunoz
它聽起來像數據訪問層中的某種錯誤，可能與SQLite實際上沒有本地日期時間存儲類型的方式有關。 – bobince