Объект 'NoneType' не имеет атрибута в форме init

Question

Дает мне, что объект ошибки 'NoneType' не имеет атрибута 'tutor_courses', я пытаюсь получить набор запросов с курсами, где request.user находится в поле преподавателя. Я пытался сделать поле преподавателя пустым, но это не так работа, как это исправить?

models.py

class Course(models.Model):
    title = models.CharField(max_length=255)
    slug = models.SlugField(max_length=150, null=True, blank=True)
    description = models.TextField()
    image = models.ImageField(upload_to='courses/course_images',blank=True,null=True)
    cover = models.ImageField(upload_to='courses/course_covers',blank=True,null=True)
    tutor = models.ForeignKey(User,related_name='tutor_courses',on_delete=models.CASCADE)
    students = models.ForeignKey(User,related_name='course_students',blank=True,on_delete=models.CASCADE,null=True)
    created = models.DateTimeField(default=timezone.now)
    updated = models.DateTimeField(auto_now=True)
    category = models.ForeignKey(CourseCategories,on_delete=models.CASCADE)
    certificate = models.ImageField(upload_to='courses/course_certificates',blank=True,null=True)
    languages = LanguageField(blank=True)
    rank_score = models.FloatField(default=0.0)
    price = models.FloatField(default=0.0)
    discount_price = models.FloatField(blank=True, null=True)

forms.py

class SectionForm(forms.ModelForm):
    def get_tutor_courses(self):
        return self.user.tutor_courses

    course = forms.ModelChoiceField(queryset=Course.objects.all())

    def __init__(self, *args, **kwargs):
        user = kwargs.pop('user', None)
        super(SectionForm, self).__init__(*args, **kwargs)
        if user is not None:
            tutor_courses = user.tutor_courses.all()
            self.fields['course'].queryset = tutor_courses
            if not tutor_courses:
                self.fields['course'].help_text = "You need to <b>create</b> a course to create sections in it"

    class Meta:
        model = CourseSections
        fields = ('title','course')

views.py

def add_section_to_course(request):
    section_form = SectionForm(**{'user': request.user})
    if request.method == 'POST':
        section_form = SectionForm(request.POST,request.FILES)
        if section_form.is_valid():
            new_section = section_form.save(commit=False)
            new_section.creator.add(request.user)
            new_section.save()
            return redirect(new_section.get_absolute_url())
    else:
        section_form = SectionForm()
    return render(request,'courses/create_section.html',{'section_form':section_form})