Why is data not being written from a Django form to the database?

Question

Django

Does not want to write data from the form to the database. At the same time, the message comes that the post was added successfully. Here is my code:
models.py

class Post(models.Model):
    STATUS_CHOICES = (
        ('unpublished', 'Unpublished'),
        ('published', 'Published'),
    )
    user = models.ForeignKey(settings.AUTH_USER_MODEL, related_name='posts_created', on_delete=models.CASCADE)
    title = models.CharField(max_length=200)
    slug = models.SlugField(max_length=200, blank=True)
    body = models.TextField(max_length=5000, null=False, blank=False)
    image = models.ImageField(upload_to='images/%Y/%m/%d/')
    created = models.DateField(auto_now_add=True, db_index=True)
    updated = models.DateTimeField(auto_now=True)
    status = models.CharField(max_length=11, choices=STATUS_CHOICES, default='unpublished')
    anonymity = models.SmallIntegerField()


    def __str__(self):
        return self.title


    def save(self, *args, **kwargs):
        if not self.slug:
            self.slug = slugify(self.title)
        super(Post, self).save(*args, **kwargs)

forms.py

class PostCreateForm(forms.ModelForm):
    class Meta:
        model = Post
        fields = ('title', 'body', 'image','anonymity')

views.py

@login_required
def post_create(request):
    if request.method == 'POST':
        post_form = PostCreateForm(instance=request.user, data=request.POST, files=request.FILES)
        if post_form.is_valid():
            cd = post_form.cleaned_data

            post_new = post_form.save(commit=False)

            #post.user = Profile.objects.get(user=request.user.id)
            post_new.user = request.user
            post_new.save()
            messages.success(request, 'Add post successfully')

        else:
            messages.error(request, 'Error add your post')
    else:
        post_form = PostCreateForm(instance=request.user)
    return render(request,
                  'posts/post/create.html',
                  {'section': 'posts',
                   'post_form': post_form})

I would be very grateful for your help!

Answer 1

Why does PostCreateForm have instance=request.user? Debage, what kind of object is obtained in post_new with such an instance