在 Django ModelForm 中保存自定义字段

Question

我无法在 ModelForm 中保存自定义字段。有问题的字段是 ModelChoiceField。

我添加了 save() 方法，如 this 问题所示。但是，当我使用它时出现错误：

ImproperlyConfigured
No URL to redirect to. Either provide a url or define a get_absolute_url method on the Model.

当我删除我的自定义 save() 方法时，它工作正常但不保存自定义字段。我错过了什么？

class NewStoryForm(forms.ModelForm):
    class Meta:
        model = Story
        fields = ['title', 'story_text']

    #custom field
    about = forms.ModelChoiceField(queryset=None)

    #initialise custom field
    def __init__(self, user, *args, **kwargs):
        super(NewStoryForm, self).__init__(*args, **kwargs)
        self.fields['about'] = forms.ModelChoiceField(queryset=Experience.objects.filter(user=user))

    #save custom field
    def save(self, commit=True):
        self.instance.about  = self.cleaned_data['about']
        super(NewStoryForm, self).save(commit=commit)

class NewStoryView(CreateView):
    form_class = NewStoryForm
    template_name = 'story/story_form.html'

    #Send user to NewStoryForm to initialise custom field
    def get_form_kwargs(self):
        kwargs = super(NewStoryView, self).get_form_kwargs()
        kwargs['user'] = self.request.user
        return kwargs

    #save author as current user
    def form_valid(self, form):
        form.instance.author = self.request.user
        return super(NewStoryView, self).form_valid(form)

Answer 1

您应该 return 从 save() 方法保存的对象：

return super(NewStoryForm, self).save(commit=commit)

在 Django ModelForm 中保存自定义字段

Save custom field in Django ModelForm

django

modelform