我想缓存一些视图直到月底。
例如
@cache_page_expire_at_end_of_month
def some_view(request):
...
我发现了这个老问题Django 每个视图缓存:设置过期时间而不是缓存超时? 但我无法让它工作。
要将 Django 视图缓存到月底,您需要创建一个自定义装饰器来计算到当前月底为止的剩余时间,然后使用具有特定超时值的 Django 缓存机制。 Django 没有内置的装饰器来将缓存过期设置为月底,因此您必须自己实现此功能。
以下是有关如何操作的分步指南:
从 django.utils.decorators 导入 method_decorator
from django.utils.decorators import method_decorator
from django.views.decorators.cache import cache_page
from datetime import datetime, timedelta
import calendar
def cache_page_expire_at_end_of_month(timeout_default=86400):
def decorator(view_func):
def _wrapped_view_func(*args, **kwargs):
# Calculate the current time and find the last day of the month
now = datetime.now()
_, last_day = calendar.monthrange(now.year, now.month)
end_of_month = datetime(now.year, now.month, last_day, 23, 59, 59)
# Calculate remaining seconds until the end of the month
delta = end_of_month - now
timeout = max(delta.total_seconds(), timeout_default)
# Apply the cache_page decorator with the calculated timeout
return cache_page(timeout)(view_func)(*args, **kwargs)
return _wrapped_view_func
return decorator
# Usage example
@cache_page_expire_at_end_of_month()
def some_view(request):
# Your view logic here
...
要将此装饰器应用于基于类的视图,您需要使用 method_decorator,如下所示:
from django.utils.decorators import method_decorator
@method_decorator(cache_page_expire_at_end_of_month(), name='dispatch')
class SomeClassBasedView(View):
def get(self, request, *args, **kwargs):
# Your view logic here
...