Django MultipleChoice 条目未刷新

发布于 2024-11-06 13:52:29 字数 494 浏览 0 评论 0原文

我有一个多选小部件，它从 mysql 数据库获取数据并向用户显示。

 list = [(x.pk, x.parameter) for x in Parameter.objects.all()]
 parameters = forms.CharField(label=("Available parameters"),widget=forms.SelectMultiple(choices=list)

例如，目前它的选择会显示为[A,B,C]。

如果我直接从数据库中删除“B”，我应该只能在 selectmultiple 小部件中看到 [A，C]（最初我以为会重新加载并再次从数据库获取数据），但这似乎不是如果是这样的话，它仍然会显示[A,B,C]。我希望 selectmultiplet 小部件在运行时实际显示当前数据库，或者至少刷新（F5）页面{似乎也不刷新小部件}。如果我重新启动网络服务器，它只会获取新的数据集。

我想这可能是我需要清除的一些缓存？感谢任何建议。谢谢

原文

I have a selectmultiple choice widget that gets data from mysql database and displays to the user.

 list = [(x.pk, x.parameter) for x in Parameter.objects.all()]
 parameters = forms.CharField(label=("Available parameters"),widget=forms.SelectMultiple(choices=list)

For example, currently it will show like [A,B,C] in its choices.

If I delete 'B' directly from the database, I should be able to see only [A,C] in the selectmultiple widget(initially I thought there will be a reload and get data from database again), but that doesn't seem to be the case, it will still display [A,B,C]. I want the selectmultiplet widget to actually show the current database at runtime, or refresh(F5) the page at least {seems to not refresh the widget too}. It will only get the new set of data if I restart the web server.

I think it might be some cache that I need to clear? Appreciate any suggestions.
Thanks

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情丝乱 2024-11-13 13:52:29

您需要将代码放入表单的 init 方法中，或者在创建表单时将选项传递给表单：

def SomeForm(forms.Form):
    def __init__(self, *args, **kwargs):
        choices = [(x.pk, x.parameter) for x in Parameter.objects.all()]
        self.fields['parameters'] = forms.CharField(label="Available parameters", widget=forms.SelectMultiple(choices=choices)

You need to put your code in the init method of the form, or pass the choices to the form on form creation:

def SomeForm(forms.Form):
    def __init__(self, *args, **kwargs):
        choices = [(x.pk, x.parameter) for x in Parameter.objects.all()]
        self.fields['parameters'] = forms.CharField(label="Available parameters", widget=forms.SelectMultiple(choices=choices)

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