Django 表单和缓存控制问题
我正在 django 中填充表单选择字段的选择，这是一个年份选择字段。我从数据库中获取年份并将它们放入该字段的元组列表中。我的代码如下所示
def get_years():
choices = []
years = []
for poll in Poll.objects.all().order_by('created'):
years.append(poll.created.year)
for year in list(set(years)):
choices.append((year, year))
return choices
，我的表单字段如下所示
year = forms.ChoiceField(choices=get_years())
问题是，当我在浏览器中看到它时，根据数据库，年份列表很好，但是当我更改数据库中的某些日期时，年份选择列表不会更新。我尝试过 width @cache_control(no_cache=True) 装饰器，但不起作用。有什么想法吗？
提前致谢！
I'm populating the choices of a form choicefield in django, it's a year select field. I get the years from the database and put them in a list of tuples in the field. My code looks like this
def get_years():
choices = []
years = []
for poll in Poll.objects.all().order_by('created'):
years.append(poll.created.year)
for year in list(set(years)):
choices.append((year, year))
return choices
and my form field looks like this
year = forms.ChoiceField(choices=get_years())
The problem is that when I see it in the browser, the year list is fine according to the database, but when I change some date in database, the year select list doesn't update. I've tried width @cache_control(no_cache=True) decorator, but doesn't work. Any ideas?
Thanks in advance!
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初始化表单实例时更新年份。
Update the years when you initialize a form instance.