Ajax Validation ImageField. Possibly bug?

[nikolaysm]

Hello,
I am using django 1.11.

When i do update object with Ajax i get error for ImageField.

That is "FileExtensionValidator" from django who expects an object for validation but a unicode is given.

Thanks for replying
Full Traceback

Traceback (most recent call last):
  File "/root/.virtualenvs/django-1.11/local/lib/python2.7/site-packages/django/core/handlers/exception.py", line 41, in inner
    response = get_response(request)
  File "/root/.virtualenvs/django-1.11/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 187, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/root/.virtualenvs/django-1.11/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 185, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/root/.virtualenvs/django-1.11/local/lib/python2.7/site-packages/django/contrib/auth/decorators.py", line 23, in _wrapped_view
    return view_func(request, *args, **kwargs)
  File "/root/.virtualenvs/django-1.11/local/lib/python2.7/site-packages/django/views/generic/base.py", line 68, in view
    return self.dispatch(request, *args, **kwargs)
  File "/root/.virtualenvs/django-1.11/local/lib/python2.7/site-packages/django/views/generic/base.py", line 88, in dispatch
    return handler(request, *args, **kwargs)
  File "/home/admin/development/hnj/company/views.py", line 67, in post
    if self.request.is_ajax():
  File "/root/.virtualenvs/django-1.11/local/lib/python2.7/site-packages/django/forms/forms.py", line 183, in is_valid
    return self.is_bound and not self.errors
  File "/root/.virtualenvs/django-1.11/local/lib/python2.7/site-packages/django/forms/forms.py", line 175, in errors
    self.full_clean()
  File "/root/.virtualenvs/django-1.11/local/lib/python2.7/site-packages/django/forms/forms.py", line 384, in full_clean
    self._clean_fields()
  File "/root/.virtualenvs/django-1.11/local/lib/python2.7/site-packages/django/forms/forms.py", line 400, in _clean_fields
    value = field.clean(value, initial)
  File "/root/.virtualenvs/django-1.11/local/lib/python2.7/site-packages/django/forms/fields.py", line 600, in clean
    return super(FileField, self).clean(data)
  File "/root/.virtualenvs/django-1.11/local/lib/python2.7/site-packages/django/forms/fields.py", line 162, in clean
    self.run_validators(value)
  File "/root/.virtualenvs/django-1.11/local/lib/python2.7/site-packages/django/forms/fields.py", line 145, in run_validators
    v(value)
  File "/root/.virtualenvs/django-1.11/local/lib/python2.7/site-packages/django/core/validators.py", line 476, in __call__
    extension = os.path.splitext(value.name)[1][1:].lower()
AttributeError: 'unicode' object has no attribute 'name'

[nikolaysm]

Could be solved by adding below function in "DropFileWidget"

def value_from_datadict(self, data, files, name):
        """
        Given a dictionary of data and this widget's name, return the value
        of this widget or None if it's not provided.
        """
        tmp = data.get(name)
        if tmp and len(tmp) == 1:
            tmp = tmp.get('current_file')
        return tmp