Question

我想设置个人资料的头像，但在更新对象时出错： '个人资料'对象没有属性'个人资料'

我创建了一个模型：

models.py

class Profile(models.Model):
   user = models.OneToOneField(User, on_delete=models.CASCADE, primary_key=True, related_name='profile')
   slug = models.SlugField(editable=False, unique=True)
   avatar = models.ImageField(upload_to=get_upload_avatar, null=True, blank=True)

模型表格：

froms.py

from PIL import Image

class AvatarForm(ModelForm):

    class Meta:
        model = Profile
        fields = ['avatar',]

    def save(self):
        avatar = super(AvatarForm, self).save()
        im = Image.open(avatar.avatar)
        resized_image = im.thumbnail(64, 64)
        resized_image.save(avatar.avatar.path)

        return avatar

照常模板渲染：

template.html

<form action="{% url 'avatar_add' me.slug %}" enctype="multipart/form-data" method="POST">
    {% csrf_token %}
    {% render_field avatar_form.avatar class="form-control form-control-sm" accept="image/*" onchange="this.form.submit()"%}
</form>

并且网址收件人：

urls.py

url(r'^profile/(?P<slug>[-\w]+)/avatar_add$', AddAvatar, name='avatar_add'),

处理视图：

@login_required
def AddAvatar(request, slug):
    if request.method == 'POST' and request.FILES['avatar'] and request.user.profile.slug == slug:
        form_avatar = AvatarForm(request.POST, request.FILES)
        if form_avatar.is_valid():
            profile = Profile.objects.get(slug=slug)
            profile.avatar = form_avatar.cleaned_data['avatar']
            profile.save()   #  <--get err here
            return HttpResponse(form_avatar.cleaned_data['avatar'])

在保存profie的同时，我得到了如上所述的错误。另一个问题是def save()函数永远不会被调用，因为我没有保存ModalForm（）实例，只是用它来更新其他东西。我是Django的新手，请帮忙。

回溯：

File "C:\Python36-32\lib\site-packages\django\core\handlers\exception.py" in inner
  41.             response = get_response(request)

File "C:\Python36-32\lib\site-packages\django\core\handlers\base.py" in _get_response
  187.                 response = self.process_exception_by_middleware(e, request)

File "C:\Python36-32\lib\site-packages\django\core\handlers\base.py" in _get_response
  185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "C:\Python36-32\lib\site-packages\django\contrib\auth\decorators.py" in _wrapped_view
  23.                 return view_func(request, *args, **kwargs)

File "C:\Users\BA\DjangoProjects\szmatkaPL\core\views.py" in AddAvatar
  209.             profile.save()

File "C:\Python36-32\lib\site-packages\django\db\models\base.py" in save
  806.                        force_update=force_update, update_fields=update_fields)

File "C:\Python36-32\lib\site-packages\django\db\models\base.py" in save_base
  836.             updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)

File "C:\Python36-32\lib\site-packages\django\db\models\base.py" in _save_table
  900.                       for f in non_pks]

File "C:\Python36-32\lib\site-packages\django\db\models\base.py" in <listcomp>
  900.                       for f in non_pks]

File "C:\Python36-32\lib\site-packages\django\db\models\fields\files.py" in pre_save
  296.             file.save(file.name, file.file, save=False)

File "C:\Python36-32\lib\site-packages\django\db\models\fields\files.py" in save
  93.         name = self.field.generate_filename(self.instance, name)

File "C:\Python36-32\lib\site-packages\django\db\models\fields\files.py" in generate_filename
  327.             filename = self.upload_to(instance, filename)

    File "C:\Users\BA\DjangoProjects\szmatkaPL\core\misc.py" in get_upload_avatar
  12.     return os.path.join('profile', 'images', 'avatar', instance.profile.user.username, filename)

Exception Type: AttributeError at /profile/xruchawicax/avatar_add
Exception Value: 'Profile' object has no attribute 'profile'

Answer 1

错误最有可能出现在模型定义中的upload_to函数“get_upload_avatar”中。它应该是instance.user而不是instance.profile.user。

Django Model在设置实例值时表示AttributeError

1 个答案: