ValueError: localtime() cannot be applied to a naive datetime問題

 

在用python的django框架進行web開發的時候，出現了一個錯誤：

 

Traceback (most recent call last):
  File "D:\Python27\lib\site-packages\django\core\handlers\exception.py", line 41, in inner
    response = get_response(request)
  File "D:\Python27\lib\site-packages\django\core\handlers\base.py", line 187, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "D:\Python27\lib\site-packages\django\core\handlers\base.py", line 185, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "D:\pythonWork\workSpace\isms\spm\spm\server\core\view\proxysView.py", line 37, in proxys_list
    return JsonResponse(content)
  File "D:\pythonWork\workSpace\isms\spm\spm\server\core\response.py", line 32, in __init__
    data = json.dumps(data, cls=encoder, **json_dumps_params)
  File "D:\Python27\lib\json\__init__.py", line 250, in dumps
    sort_keys=sort_keys, **kw).encode(obj)
  File "D:\Python27\lib\json\encoder.py", line 207, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "D:\Python27\lib\json\encoder.py", line 270, in iterencode
    return _iterencode(o, 0)
  File "D:\pythonWork\workSpace\isms\spm\spm\server\core\encoder.py", line 25, in default
    return timezone.localtime(o).strftime(DATE_TIME_FORMAT)
  File "D:\Python27\lib\site-packages\django\utils\timezone.py", line 216, in localtime
    raise ValueError("localtime() cannot be applied to a naive datetime")
ValueError: localtime() cannot be applied to a naive datetime

 

 

在這里找到了解決方案：https://github.com/django-tastypie/django-tastypie/pull/561

django中的時區設置TIME_ZONE,USE_TZ

在settings.py中設置：

 

1.  
   TIME_ZONE = 'Asia/Shanghai'
2.  
   USE_TZ = True

 

分析原因：

 啟用 USE_TZ = True 后，處理時間方面，有兩條 “黃金法則”：
保證存儲到數據庫中的是 UTC 時間；
在函數之間傳遞時間參數時，確保時間已經轉換成 UTC 時間；