Question

在我的last question中，我在选择小部件中显示导入的选择时遇到了麻烦，因为我缺少了（应该是）明显的一些代码。现在，我的GET（似乎可以正常工作）。问题是我在POST中做错了事。

我不知道如何在POST中处理kwarg。如果我在行的post方法中加入了kwargs

form = Enter_SW_Room(request.POST, **kwargs)

我收到错误__init__() got multiple values for argument 'data'。环顾堆栈溢出，我发现此错误的大多数问题源于在super中调用self（或其他调用错误）。例如。 problem / solution。如果我尝试通过不传递kwargs来解决此问题，则验证失败。（我认为是因为适当的字段现在有一个值，但是选择已经消失了。）

所以，我认为是我正在做一些简单但又很重要的错误，或者我需要修改表单验证。（或???）

这里是所有代码（为简洁起见，已删除）：

''' views.py '''
class DockingBay(FormMixin, TemplateView):
    form_class = Enter_SW_Room

    def get_form_kwargs(self):
        kwargs = super().get_form_kwargs()
        # snip; create my_avatar_choices, which is more than just a queryset
        kwargs['avatar_list'] = my_avatars_choices
        return kwargs

    def get(self, request, *args, **kwargs):
        kwargs = self.get_form_kwargs()
        # snip
        my_rooms_list = []  # used in the template
        form = Enter_SW_Room(**kwargs)
        args = {'form': form, 'my_rooms_list': my_rooms_list}

        return render(request, self.template_name, args)

    def post(self, request, **kwargs):
        print(request.POST)
        kwargs = self.get_form_kwargs()
        form = Enter_SW_Room(request.POST, **kwargs)
        if form.is_valid():
            # snip - logic to enter the room with correct passcode
            return redirect('swdice:swroom', swroom_id)
        else:
            # snip - error handling will go here


'''forms.py'''
class Enter_SW_Room(forms.ModelForm):
    class Meta:
        model = EnterSWroom
        widgets = {'default_avatar': forms.Select()}
        fields = ('room_number', 'passcode', 'default_avatar')

    def __init__(self, *args, **kwargs):
        imported_list = kwargs.pop('avatar_list')
        super().__init__(*args, **kwargs) 
        self.fields['default_avatar'].choices = imported_list

    default_avatar = forms.ChoiceField(choices=[])


'''template'''
<h4>Enter a room using passcode</h4>
    <form method="post">
        {% csrf_token %}
        <table>
            <col width="240">
            <col width="120">
            <tr>
                <td><strong>Room ID:</strong>
                <br>This will be a number.</td>
                <td>{{form.room_number}} <br>
                    <strong>{{ form.room_number.errors }}</strong>
                </td>
            </tr>
            <tr>
                <td><strong>Passcode:</strong>
                <br>If the room is open, or you have been in it before, leave this  blank.</td>
                <td>{{form.passcode}} <br>
                    <strong>{{ form.passcode.errors }}</strong>
                </td>
            </tr>
            <tr>
                <td><strong>Avatar:</strong>
                <br>Select your avatar.</td>
                <td>{{form.default_avatar}} <br>
                    <strong>{{ form.default_avatar.errors }}</strong>
                </td>
            </tr>
        </table>
        <button type="submit">Enter Room</button>
    </form>
    <hr>

Answer 1

您可以通过将代码更改为以下内容来防止错误发生：

form = Enter_SW_Room(**kwargs)

您当前的代码等同于

form = Enter_SW_Room(data=request.POST, **kwargs)

由于kwargs已包含'data'，因此您会收到多参数错误。

在POST和CBV中处理变态

1 个答案: