如何从视图将值传递给 Django Form init 方法？

【问题标题】：How can I pass a value to Django Form's init method from a view?如何从视图将值传递给 Django Form init 方法？
【发布时间】：2015-03-28 01:42:35
【问题描述】：

forms.py

class AddDuration(forms.Form):

    def __init__(self, *args, **kwargs): 
        super(AddDuration, self).__init__(*args, **kwargs)
        // set value to relates_to_choices
        relates_to_choices = ????????????? // Something like self.choices
        self.fields['duration'].choices = relates_to_choices

    duration = forms.ChoiceField(required=True)

现在，我有一个包含类的 views.py 文件

class AddDurationView(FormView):
    template_name = 'physician/add_duration.html'
    form_class = AddDurationForm

【问题讨论】：

标签： django forms views init choicefield

【解决方案1】：

覆盖视图上的get_form_kwargs() 方法。

views.py

class AddDurationView(FormView):
    template_name = 'physician/add_duration.html'
    form_class = AddDurationForm

    def get_form_kwargs(self):
        kwargs = super(AddDurationView, self).get_form_kwargs()
        kwargs['duration_choices'] = (
            ('key1', 'display value 1'),
            ('key2', 'display value 2'),
        )
        return kwargs

forms.py

class AddDurationForm(forms.Form):
    duration = forms.ChoiceField(required=True)

    def __init__(self, duration_choices, *args, **kwargs): 
        super(AddDurationForm, self).__init__(*args, **kwargs)
        // set value to duration_choices
        self.fields['duration'].choices = duration_choices

【讨论】：