from django.forms import ImageField as BaseImageField


class ImageField(BaseImageField):

    def to_internal_value(self, data):
                # if data is None image field was not uploaded
        if data:
            file_object = super(ImageField, self).to_internal_value(data)
            django_field = self._DjangoImageField()
            django_field.error_messages = self.error_messages
            django_field.to_python(file_object)
            return file_object
        return data