表单不接受额外参数

发布于 2024-09-29 00:51:10 字数 892 浏览 2 评论 0原文

我试图向我的表单传递一个附加参数，这是一个对象到外键的关系。但不知道为什么表单返回 __init__() 得到了一个意外的关键字参数 'parent' 当我非常确定可以向表单的 __init__ 发送额外的参数时（即这里：简单表单未验证）。我错了吗？

def add_video(request):
    parent = ParentObject.objects.all()[0]
    if request.method == 'POST':
        form = VideoForm(data=request.POST, parent=parent)
        if form.is_valid():
            form.save()            
            next = reverse('manage_playforward',)
            return HttpResponseRedirect(next)
    else:
        form = VideoForm()

class VideoForm(forms.ModelForm):       

    def __init__(self, *args, **kwargs):
        try:
            self.parent = kwargs.pop['parent']
            logging.debug(self.parent)
        except:
            pass    
        super(VideoForm, self).__init__(*args, **kwargs)

原文

I was trying to pass an additional parameter to my form, which is anObject to ForeignKey relation. But dunno why form returns __init__() got an unexpected keyword argument 'parent' when I'm pretty sure that it is possible to send additional parameters to form's __init__ (ie here : Simple form not validating). Am I wrong ?

def add_video(request):
    parent = ParentObject.objects.all()[0]
    if request.method == 'POST':
        form = VideoForm(data=request.POST, parent=parent)
        if form.is_valid():
            form.save()            
            next = reverse('manage_playforward',)
            return HttpResponseRedirect(next)
    else:
        form = VideoForm()

class VideoForm(forms.ModelForm):       

    def __init__(self, *args, **kwargs):
        try:
            self.parent = kwargs.pop['parent']
            logging.debug(self.parent)
        except:
            pass    
        super(VideoForm, self).__init__(*args, **kwargs)

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

清风挽心 2024-10-06 00:51:10

kwargs.pop['parent'] 抛出 TypeError: 'builtin_function_or_method' object is unsubscriptable，因为您尝试对函数方法进行键查找 ({}.pop）。然后，该错误将被异常处理程序吞掉。

为此，请执行 kwargs.pop('parent', None)。对于您的情况：

class VideoForm(forms.ModelForm):       
    def __init__(self, *args, **kwargs):
        self.parent = kwargs.pop('parent', None)
        super(VideoForm, self).__init__(*args, **kwargs)

顺便说一句，99% 的情况下最好只捕获 except 块中的特定异常。这样做将有助于避免像这样的错误/混乱。另外，我强烈建议为这个自定义构造添加单元测试（或者只是 TDDing 你的其他代码，但这是一个单独的问题）

kwargs.pop['parent'] is throwing TypeError: 'builtin_function_or_method' object is unsubscriptable, because you're trying to do a key lookup on a function method ({}.pop). This error is then being swallowed by your exception handler.

For this to work do kwargs.pop('parent', None). In your case:

class VideoForm(forms.ModelForm):       
    def __init__(self, *args, **kwargs):
        self.parent = kwargs.pop('parent', None)
        super(VideoForm, self).__init__(*args, **kwargs)

As a side note, 99% of time its best to only catch specific Exceptions in your except blocks. Doing so will help dodge bugs/confusion like this. Also, I would highly suggest adding unit tests for this custom construction (or just TDDing your other code, but that's a separate issue)

回复收藏 0 原文

~没有更多了~