Django. Loading images. MultiValueDictKeyError. What to do?

Question

Django

I'm trying to do an image upload in Django.
I create a class in the model with the FileField field:

class UserProfile(models.Model):
  user = models.OneToOneField(User, unique=False)
  picture = models.FileField(upload_to='media/images/', blank=True, null=True)

  def __unicode__(self):
    return unicode(self.picture.name)

in forms.py:

class ProfileForm(forms.ModelForm):
  class Meta:
    model = UserProfile
    fields = ['picture']

in view.py:

def signup(request, user_id=None, template_name='signup.html'):
     ...
     if request.method == 'POST':
          ...
          profileForm = ProfileForm(request.POST, request.FILES)
    if profileForm.is_valid():
    print("profileForm is valid!")
    print(request.POST)
    pic = UserProfile(picture=request.FILES['picture'])
    pic = profileForm.save(commit=False)
    pic.user = request.user
    pic.save()
    message = "File %s is uploaded" % pic
    print(message)
   else:
    print("NOT VALID!")

and template:

<form action="" method="POST" enctype="multi-part/formdata">
        <table>
            {{ profileForm.as_table }}
        </table>
        {% csrf_token %}
        <input type="submit" name="submit" value="Submit">
    </form>

swears at: request.FILES['picture']
Traceback:

Environment:
Request Method: POST
Request URL: http://127.0.0.1:8000/user/1/edit/

Django Version: 1.6.1
Python Version: 3.3.3
Installed Applications:
('django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'blog')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware')

Traceback:
File "C:\Python33\lib\site-packages\django\core\handlers\base.py" in get_response
  114.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Django\sandpit\blog\views.py" in signup
  147. 			pic = UserProfile(picture=request.FILES['picture'])
File "C:\Python33\lib\site-packages\django\utils\datastructures.py" in __getitem__
  301.             raise MultiValueDictKeyError(repr(key))

Exception Type: MultiValueDictKeyError at /user/1/edit/
Exception Value: "'picture'"

Although in QueryDict it shows the file name: Tell me <QueryDict: ... , 'picture': ['2.jpeg'], ... >
, please, what is wrong?

Answer 1

I'll duplicate it just in case:
Precisely, the opposite is true. This type is called multipart/form-data

Answer 2

You don't have the picture key in your request.FILES dictionary. Try like this:

value = request.FILES.get('picture')
if value:
    pic = UserProfile(picture=value)
    # ...
             
else:
    # ...

And also read the documentation , there is a slightly different approach.

Answer 3

how difficult it is for you

class UserProfile(models.Model):
    user = models.ForeignKey(User)
    picture = models.ImageField(upload_to='images', blank=True, null=True)

    def __unicode__(self):
        return unicode(self.picture.name)

class ViewSuccess(TemplateView):
     template_name = 'view_success.html'

class ViewSignup(CreateView):
     template_name = 'view_signup.html'
     success_url = reverse_lazy('view_success')
     model = UserProfile

urls.py

url(r'^$', 
    url(r'^signup/$', ViewSignup.as_view(), name='view_signup'),
    url(r'^success/$', ViewSuccess.as_view(), name='view_success'), )

Answer 4

Just suffered too. I don't know how, but this shit code works.

@login_required
def products_edit(request, product):
    cont = {}
    form = ProductForm()
    if request.POST:
        form = ProductForm(request.POST, request.FILES)
        if form.is_valid():
            try:
                product = Product.objects.get(slug=product, refract=True)
                product.name = form.cleaned_data['name']
                product.description = form.cleaned_data['description']
                product.price = form.cleaned_data['price']
                product.razdel = form.cleaned_data['razdel']
                product.refract = False
                product.save()
                cont['message'] = u'Всё сохранено'
            except:
                product = form.save()
                product.img = request.FILES['img']
                cont['message'] = u'Новое изделие добавлено'
    else:
        try:
            product_ed = Product.objects.get(slug=product, refract=True)
            cont['product_ed'] = product_ed
            cont['form'] = ProductForm(instance=product_ed)
        except Product.DoesNotExist:
            cont['form'] = form
            cont['message'] = u'Не найден такой продукт, будет создан новый'
    return render_to_response('admining/product_edit.html', cont, context_instance=RequestContext(request))

Answer 5

Try something like this:
add to the UserProfile class
This construct will allow access to the profile through the profile attribute. For example, user.profile.picture
Then in the view add

if request.POST:
        form = UserProfileForm(request.POST, request.FILES, instance=request.user.profile)
        if form.is_valid():
            form.save()