具有动态form_class的Updateview [英] Updateview with dynamic form_class

问题描述

我想在Django 1.6中动态更改 UpdateView CBV的 form_class .

I would like to dynamically change the form_class of an UpdateView CBV in Django 1.6.

我尝试使用get_context_data()进行此操作，但这没有帮助，因为表单已经初始化.我想这将需要在 __ init __ 期间发生.这是我在 __ init __ 上尝试过的方法:

I've tried to do this using the get_context_data(), but that didn't help since the form is already initialized. So it will need to happen during __init__, I guess. Here's what I've tried on __init__:

class UpdatePersonView(generic.UpdateView):

    model = Person
    form_class = ""

    def __init__(self, *args, **kwargs):
        super(UpdatePersonView, self).__init__(*args, **kwargs)
        person = Person.objects.get(id=self.get_object().id)
        if not person.somefield:
            self.form_class = OneFormClass
        elif person.somefield:
            self.form_class = SomeOtherFormClass

当执行 person = Person.objects.get(id = self.get_object().id)时，我陷入了'UpdatePersonView'对象没有属性'kwargs'错误消息的问题).

I'm stuck with a 'UpdatePersonView' object has no attribute 'kwargs' error message when executing person = Person.objects.get(id=self.get_object().id).

手动指定ID(例如 id = 9 )时，设置即可正常工作.

When manually specifying the id (e.g. id=9), then the setup works.

如何在要覆盖的 init 方法中获取args/kwargs?特别是我需要访问 pk .

How can I get the args/kwargs inside the init method that I'm overriding? Particularly I would need access to the pk.

推荐答案

您应该简单地覆盖

You should simply override get_form_class.

(而且我不确定为什么要查询 person :那个对象已经是 self.get_object()了，所以毫无意义的ID，然后再次查询.)

(Also I'm not sure why you're querying for person: that object is the same is self.get_object() already, so there's no point getting the ID of that then querying again.)

def get_form_class(self):
    if self.object.somefield:
        return OneFormClass
    else:
        return SomeOtherFormClass

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