我有一个模型以及基于该模型的ModelForm. ModelForm包含一个ModelMultipleChoice字段,我在ModelForm的子类中指定:
class TransactionForm(ModelForm):
class Meta:
model = Transaction
def __init__(self, *args, **kwargs):
super(TransactionForm, self).__init__(*args, **kwargs)
self.fields['category'] = forms.ModelChoiceField(queryset=Category.objects.filter(user=user))
如您所见,我需要按用户过滤类别查询集.换句话说,用户应该只在下拉列表中看到自己的类别.但是,当用户,或者更具体地说,request.user在Model实例中不可用时,我该怎么做呢?
编辑:添加我的CBV子类:
class TransUpdateView(UpdateView):
form_class = TransactionForm
model = Transaction
template_name = 'trans_form.html'
success_url='/view_trans/'
def get_context_data(self, **kwargs):
context = super(TransUpdateView, self).get_context_data(**kwargs)
context['action'] = 'update'
return context
我试过form_class = TransactionForm(user = request.user),我得到一个NameError,说找不到请求.
最佳答案 您可以将request.user传递给视图中的init:
def some_view(request):
form = TransactionForm(user=request.user)
并添加用户参数以形成__init__方法(或从表格中的kwargs弹出):
class TransactionForm(ModelForm):
class Meta:
model = Transaction
# def __init__(self, *args, **kwargs):
# user = kwargs.pop('user', User.objects.get(pk_of_default_user))
def __init__(self, user, *args, **kwargs):
super(TransactionForm, self).__init__(*args, **kwargs)
self.fields['category'] = forms.ModelChoiceField(
queryset=Category.objects.filter(user=user))
update:在基于类的视图中,您可以在get_form_kwargs中添加额外的参数以形成init:
class TransUpdateView(UpdateView):
#...
def get_form_kwargs(self):
kwargs = super(YourView, self).get_form_kwargs()
kwargs.update({'user': self.request.user})
return kwargs