python - Django - form.save() is not creating ModelForm

Question

In my Django application users send feedback about task. I'm creating this form with ModelForm, and after form.save() my object is not creating and is not uploading to database. Here are my codes:

views.py:

@login_required(login_url='sign_in')
def task_details(request, slug):
    if slug:
        task = get_object_or_404(Task, slug=slug)
        today = datetime.now().date()
        deadline = task.task_deadline.date()
        time_left = deadline - today
        form = CreateFeedbackForm()

    if request.method == 'POST':
        form = CreateFeedbackForm(request.POST)
        if form.is_valid():
            form.save()
            return redirect('index')
    else:
        form = CreateFeedbackForm()
    messages.info(request, 'Feedback sent.')

    context = {
        'task': task,
        'form': form,
        'days_left': time_left.days
    }
    return render(request, 'task-details.html', context)

models.py:

class TaskFeedback(models.Model):
    task = models.ForeignKey(Task, on_delete=models.CASCADE, null=True, blank=True)
    sender = CurrentUserField()
    is_solved = models.BooleanField(default=False)
    feedback_content = models.TextField(max_length=1000, null=True, blank=True)
    date_added = models.DateTimeField(auto_now_add = True)

    def __str__(self):
        return self.feedback_content

forms.py:

class CreateFeedbackForm(forms.ModelForm):
    class Meta:
        model = TaskFeedback
        fields = ['feedback_content', 'is_solved']

    def __init__(self, *args, **kwargs):
        super(CreateFeedbackForm, self).__init__(*args, **kwargs)

Answer 1

The problem was in action of form in my html page:

<form action="{% url 'task_details' task.slug %}" method="POST">
            {% csrf_token %}
            {{ form.feedback_content }}
            <div class="panel-buttons">
                <div class="checkbox">
                    {{ form.is_solved }}
                </div>
                <div class="save-btn-container">
                    <button class="btn btn--pill btn--green" type="submit">Send</button>
                </div>
            </div>
        </form>