Django:将数据从 CBV 表单 View 传递到表单 CBV

Question

我有 Form与 ModelChoiceField ，用作 form_class在 FormView .

必须使用绑定(bind)到 request 的信息填充选择字段。目的。

让我们总结一下:

class MyFormView(FormView):
    # I need to pass `request.user` and a value 
    # derived from `request.GET['pk']` to the form
    form_class = MyForm

class MyForm(Form):
    choices = ModelChoiceField(queryset=MyChoice.objects.none())

    def __init__(self, user, number, *args, **kwargs):
        super(MyForm, self).__init__(*args, **kwargs)
        self.fields['choices'] = MyChoice.objects(number=number, owner=user)

创建实例时，我需要做什么才能将该数据传递给表单？

我尝试覆盖 get_form但我不确定这是这样做的正确方法:

 def get_form(self, form_class):
        user = self.request.user
        number = SomeModel.objects.get(self.GET['pk']).number
        return form_class(user, number, **self.get_form_kwargs())

Answer 1

覆盖 get_form会起作用，但更好的方法是覆盖 get_form_kwargs ，这样您就不必复制 get_form 中的代码方法。

class MyFormView(FormView):
    form_class = MyForm

    def get_form_kwargs(self):
        kwargs = super(MyFormView, self).get_form_kwargs()
        kwargs['user'] = self.request.user
        kwargs['number'] = SomeModel.objects.get(self.GET['pk']).number
        return kwargs