Django + Forms：ChoiceField的动态选择 [英] Django + Forms: Dynamic choices for ChoiceField

问题描述

我正在尝试为ChoiceField创建一个动态列表，但我似乎无法调用请求。以下是代码：

I'm trying to create a dynamic list of choices for the ChoiceField but I can't seem to call request. Here's the code:

错误：

AttributeError: 'CreationForm' object has no attribute 'request'

strong>

Forms

class FooForm(forms.Form):

    def __init__(self, *args, **kwargs):
        super(FooForm, self).__init__(*args, **kwargs)
        bars = self.request.session['bars']
        foo_list = []
        for bar in bars:
            foo_list.append((bar['id'], bar['name']),)
        self.fields['foo'].choices = foo_list
    foo = forms.ChoiceField(choices=foo_list, required=True)

推荐答案

当您实例化表单时，为什么不从视图中传递选项？

Why not pass the choices in from the view when you instantiate the form?

例如

Form：

class FooForm(forms.Form):
    def __init__(self, foo_choices, *args, **kwargs):
        super(FooForm, self).__init__(*args, **kwargs)
        self.fields['foo'].choices = foo_choices

    foo = forms.ChoiceField(choices=(), required=True)

查看：

... 
bars = request.session['bars']
foo_list = []
for bar in bars:
    foo_list.append((bar['id'], bar['name']),)
form = FooForm(foo_list)
...

这篇关于Django + Forms：ChoiceField的动态选择的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！