Как получить данные текущего пользователя в форме?

Код представленения:
def blog_post_new(request):
    if request.method == "POST":
        form = BlogPostNewForms(request.POST or None)
        if form.is_valid():
            save_form = form.save(commit=False)
            save_form.user = request.user
            save_form.save()
            joe = User.objects.get(username=request.user.username)
            task = BlogPostNew.objects.get(slug=save_form.slug)
            assign_perm('add_blogpostnew', joe, task)
            assign_perm('change_blogpostnew', joe, task)
            assign_perm('delete_blogpostnew', joe, task)
            save_form.save()
            return redirect('blog_post_detail', slug=save_form.slug)
    else:
        form = BlogPostNewForms()# По Traceback ошибка в этом месте
    return render(request, 'pages/blog_post_edit.html', {'form': form})

Код формы полностью:

class BlogPostNewForms(ModelForm):
    class Meta:
        model = BlogPostNew
        fields = '__all__'
        exclude =['user','related_posts','featured_image', 'publish_date', 'short_description','slug','short_url','_meta_title','expiry_date','gen_description','in_sitemap','keywords','categories', 'description']
    def __init__(self, *args, **kwargs):
        super(BlogPostNewForms, self).__init__(*args, **kwargs)
        if self.instance:
            # self.fields['blog'].queryset = MyBlog.objects.filter(name='myblog')
            self.fields['blog'].queryset = MyBlog.objects.filter(author=self.user) # И тут тоже ошибка

Модель Profile
class MyProfile(models.Model):
    user = models.OneToOneField("auth.User")
    date_of_birth = models.DateField(null=True)
    bio = models.TextField()
    avatar = models.ImageField(upload_to='uploads/', default='uploads\gallery\Berlin, Germany.jpg')

    def __str__(self):
        return self.user.username