類型'LazySettings'的django參數不可迭代;那麼如何檢查一個設置是否存在？

Question

from django.conf import settings 

def my_view(self, request, *args, **kwargs): 
    if 'LOCAL' in settings and settings.LOCAL: 
     # do something 

TypeError at ... argument of type 'LazySettings' is not iterable

然後如何檢查設置是否存在？否則，我會收到屬性錯誤。

Answer 1

可以使用hasattr功能：

if hasattr(settings, 'name_of_setting'): 
    # the setting exists 
else: 
    # the setting does not exist