Question

首先，英语不是我的主要语言，所以请不要对我大喊;）

我有ManyToManyField的模型。我为这个表单做了，但我不能用这个表单添加新项目。我的kode看起来像那样：

forms.py

class NoteForm(forms.Form):
    title = forms.CharField(max_length = 100)
    author = forms.CharField(max_length = 100)
    description = forms.TexField()
    type = forms.CharField(max_length = 10)
    disciple = forms.ManyToManyField(queryset=Disciple.objects.all())

views.py

def new_note(request):
    note = Diary.objects.all()
    disc = Disciple.objects.all()
    form = NoteForm(request.POST)
    if form.is_valid():
        note_form = form.save(commit=False)
        data = request.POST.copy()
        note_form.title = form.cleaned_data['title']
        note_form.author = form.cleaned_data['author']
        note_form.description = form.cleaned_data['description']
        note_form.type = form.cleaned_data['type']
        note_form.disciple = form.cleaned_data['disciple']
        for item in  note_form.disciple:
            note_form.disciple.add(item)
        note_form.save()
        form = NoteForm()
        return render_to_response('dziennik/users.html', {'note': note, 'form': form},
                    context_instance=RequestContext(request))
    else:
            return render_to_response('dziennik/new_note.html', {'note': note, 'form': form},
                    context_instance=RequestContext(request))

当我尝试添加新对象时，我会在此行中收到错误：

note_form.disciple = form.cleaned_data ['disciple']

错误是：

"Diary: Diary object" needs to have a value for field "diary" before this many-to-many relationship can be used.

我不知道如何解决这个问题，如果没有它我就无法继续下去。

Answer 1

在添加note_form.save()对象之前，您需要先致电ManyToMany。

note_form.save()
for item in  note_form.disciple:
    note_form.disciple.add(item)

DJANGO在Form中发布ManyToManyField问题

1 个答案: