如何访问 ModelForm 中的请求以添加 request.user 作为外键

Question

我试图覆盖模型表单中的保存以将当前用户添加为车辆的所有者。但我收到“NoneType”对象没有属性“user” 我忘记了什么？

forms.py：

class VehicleForm(ModelForm):
    class Meta:
        model = Vehicle
        exclude = ('slug', 'owner', )

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

    def save(self, *args, **kwargs):
        kwargs['commit']=False
        obj = super(VehicleForm, self).save(*args, **kwargs)
        obj.owner = self.request.user
        obj.save()
        return obj

我的模型：

class VehicleBase(models.Model):

    owner           = models.ForeignKey(User)

    vehicle_type    = models.SmallIntegerField(_('kind'),
                  choices=vehicle_types, default=1,)

    make            = models.CharField(_('make'), max_length=31,
                  help_text=_('Maximum is 31 characters.'), )

    model           = models.CharField(_('model'), max_length=31,
                  help_text=_('Maximum is 31 characters.'), )

    class Meta:
        abstract = True


class Vehicle(VehicleBase):
    name        = models.CharField(_('fun name'), max_length=31,
                  help_text=_('Maximum is 31 characters.'), )

    slug            = models.SlugField(_('slug'), )

    def save(self, *args, **kwargs):
        is_new = self.pk is None
        if is_new:
            self.slug = slugify("%s %s %s" %(self.make, self.model, self.name, ))
        super(Vehicle, self).save(*args, **kwargs) # Call the "real" save() method.

        if is_new:
            Calendar.objects.get_or_create_calendar_for_object(self, name = "%s's schedule" %self.name)

    class Meta:
        unique_together = (("name", "owner", ), )

def __unicode__(self):
    return u'%s: %s\'s %s %s' %(self.name, self.owner, self.make, self.model, )

def __str__(self):
    return self.__unicode__()

def get_absolute_url(self):
    return reverse('vehicle_view', kwargs={'object_id':self.id, 'slug':self.slug, }, )

我正在使用通用视图：

url(r'^create/$',
    'create_update.create_object',
    dict(template_name='vehicles/vehicle_create.html',
         form_class=VehicleForm,
         post_save_redirect="/vehicles/"),
    name='vehicle_create'),

Answer 1

这是我最近如何编写视图的简短版本，仅供将来查看。
不需要任何 __init__ 子类化，也不需要重复表单构造函数：

@login_required
def create_vehicle(request):
    form = forms.VehicleForm(data=request.POST or None)
    if form.is_valid():
        form.instance.owner = request.user
        form.save()
        return redirect('vehicles')
    return render(request, 'vehicles/vehicle_create.html', {'form': form})

Answer 2

我想在 Manoj 和 Daniel 的回复中添加更多信息。基本上我需要一个自定义视图才能在保存时传递用户

urls.py:views.py:forms.py

url(r'^create/
 :
@login_required
def create_vehicle(request):
    if request.method == 'POST':
        form = VehicleForm(request.POST)
        if form.is_valid():
            vehicle = form.save(commit=False)
            vehicle.owner = request.user
            vehicle.save()
        return HttpResponseRedirect('/vehicles/')
    else:
        form = VehicleForm()
    return render_to_response('vehicles/vehicle_create.html', {'form': form},     context_instance=RequestContext(request))

：
class VehicleForm(ModelForm):
    class Meta:
        model = Vehicle
        exclude = ('slug', 'owner', )

,
    'create_vehicle',
    name='vehicle_create'),

:

：

Answer 3

您没有显示如何在视图中实例化表单。当您这样做时，您需要记住实际传递请求：

def myview(request):
    form = VehicleForm(instance=whatever, request=request)