重新填充 Django ChoiceField 而不重新启动服务器

发布于 2024-12-11 16:53:26 字数 306 浏览 0 评论 0原文

我有一个简单的表单，用户可以从选择字段中选择一个部门。

这是我的表单：

class NewDealForm1(forms.Form):
        department = forms.ChoiceField(choices = map(lambda x:('%s'% x.id, '%s' % x.title),Department.objects.all()))

每当我从管理员添加新部门时，除非重新启动服务器，否则我的选择字段不会显示新部门。

如何在不重新启动服务器的情况下显示所有部门？

原文

I have a simple form where users can select a department from a choicefield.

This is my form :

class NewDealForm1(forms.Form):
        department = forms.ChoiceField(choices = map(lambda x:('%s'% x.id, '%s' % x.title),Department.objects.all()))

Whenever I add a new department from admin, my choicefield doesn't display new department unless I restart my server.

How can i display all departments without restarting the server ?

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时光与爱终年不遇 2024-12-18 16:53:26

您应该尝试使用直接接受查询集的 forms.ModelChoiceField，而不是使用 forms.ChoiceField。

文档： https://docs.djangoproject.com/en/dev/ ref/forms/fields/#modelchoicefield

示例

class NewDealForm1(forms.Form):
    department = forms.ModelChoiceField(queryset=Department.objects.all()))

Instead of using a forms.ChoiceField you should try a forms.ModelChoiceField which takes a queryset directly.

Docs: https://docs.djangoproject.com/en/dev/ref/forms/fields/#modelchoicefield

Example

class NewDealForm1(forms.Form):
    department = forms.ModelChoiceField(queryset=Department.objects.all()))

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铃予 2024-12-18 16:53:26

沃尔夫的回答是正确的。

但要直接回答您的问题（“在不重新启动服务器的情况下重新填充 Django ChoiceField”），您需要在表单构造函数中设置选择。以下是动态信用卡年份选择的示例。

class NewDealForm1(forms.Form):
    year = forms.ChoiceField(choices=[]))

    def __init__(self, *args, **kwargs):
        super(NewDealForm, self).__init__(*args, **kwargs)
        year = datetime.date.today().year
        self.fields['year'].choices = [(x, x) for x in range(year, year+10)]

Wolph's answer is correct.

But to answer your question directly ("Repopulating Django ChoiceField Without Restarting Server"), you'd need to set the choices in your form constructor. Here's an example for a dynamic credit card year choice.

class NewDealForm1(forms.Form):
    year = forms.ChoiceField(choices=[]))

    def __init__(self, *args, **kwargs):
        super(NewDealForm, self).__init__(*args, **kwargs)
        year = datetime.date.today().year
        self.fields['year'].choices = [(x, x) for x in range(year, year+10)]

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