Django:CommentForm工作不正常，没有错误？

Question

正在尝试创建注释窗体，如下所示：

class CommentCreationForm(forms.Form):
    body = forms.CharField(widget=forms.Textarea)
    author = forms.CharField()

    def __init__(self, *args, **kwargs):
        super(CommmentCreationForm, self).__init__(*args, **kwargs)
        self.user = kwargs.pop('user', None)

    def save(self):
        data = self.cleaned_data
        comment = Comment(body=data['body'], author=data['author'], user=self.user)
        comment.save()

    def clean(self):
        return self.cleaned_data

你知道吗视图.py你知道吗

@login_required
def create(request):
    try:
        if is_post(request):
            form = CommentCreationForm(request.user)
            if form.is_valid():
                print 'valid'
                form.save()
                return render_to_response("login.html", context_instance = RequestContext(request))
            return render_to_response("login.html", context_instance = RequestContext(request))
        return render_to_response("create.html", {'form':CommentCreationForm()}, context_instance = RequestContext(request))
    except Exception as e:
        print str(e)

如果我提交表单，它将返回：“User”对象没有“get”属性。我肯定我做错了什么，但我不知道是什么。你知道吗

Answer 1

首先，表单初始化不正确，Form.__init__的签名如下所示：

Form.__init__(data=None, files=None, ...)

# When you put
form = CommentCreationForm(request.user)
# The data is feed w/ request.user ...

其次，self.user = kwargs.pop('user', None)总是将self.user设置为None，除非调用代码是：

form = CommentCreationForm(request.POST, user=request.user) 

最后，更好的方法是在某些范围内直接引用request.user，例如：

def make_commment_form_cls(user):

    class CommentCreationForm(forms.Form):
        body = forms.CharField(widget=forms.Textarea)
        author = forms.CharField()

        def save(self):
            data = self.cleaned_data
            # HERE
            comment = Comment(body=data['body'], author=data['author'], user=user)
            comment.save()

    return CommentCreationForm

在创建视图中

# replace 
form = CommentCreationForm(request.user)
# with
form = make_comment_form_cls(request.user)(request.POST)