Cannot assign the current user to the ForeignKey field in my model.

I am trying to build a feedback application for the teachers by the students. I have a proxy User that will the student. But I am not able to assign the user to the feedback model. I am a newbie. Please help.

Thanks and regards,

Saloni

models.py:

class User(auth.models.User, auth.models.PermissionsMixin):

    def __str__(self):

        return self.username

class Teacher(models.Model):

    teacher_name = models.CharField(blank=False, max_length=100, unique=True, null=False)

    def __str__(self):

        return self.teacher_name

class Subject(models.Model):

    subject_name = models.CharField(blank=False, max_length=100, unique=True, null=False)

    def __str__(self):

        return self.subject_name

class Feedback(models.Model):

    user = models.ForeignKey(User, related_name = 'feedback', on_delete=models.CASCADE, blank=False, null=False)

    teacher = models.ForeignKey(Teacher, related_name = 'feedback', on_delete=models.CASCADE, blank=False, null=False)

    subject = models.ForeignKey(Subject, related_name = 'feedback', on_delete=models.CASCADE, blank=False, null=False)

    param1 = models.PositiveIntegerField(blank=False, null=False)

    param2 = models.PositiveIntegerField(blank=False, null=False)

    param3 = models.PositiveIntegerField(blank=False, null=False)

    param4 = models.PositiveIntegerField(blank=False, null=False)

    param5 = models.PositiveIntegerField(blank=False, null=False)

    param6 = models.PositiveIntegerField(blank=False, null=False)

    param7 = models.PositiveIntegerField(blank=False, null=False)

    param8 = models.PositiveIntegerField(blank=False, null=False)

    param9 = models.PositiveIntegerField(blank=False, null=False)

    param10 = models.PositiveIntegerField(blank=False, null=False)

    def get_absolute_url(self):

        return reverse(

            "feedback:detail",

            kwargs={"username": self.user.username, "pk": self.pk})

    def __str__(self):

        return (self.username + "->" + self.teacher)

    class Meta:

        ordering = ["teacher"]

        unique_together = ["user", "teacher", "subject"]

forms.py:

class FeedbackForm(forms.ModelForm):

    class Meta:

        fields = ("teacher", "subject", "param1", "param2", "param3", "param4",

                    "param5", "param6", "param7", "param8", "param9", "param10")

        model = models.Feedback

    def __init__(self, *args, **kwargs):

        user = kwargs.pop("user", None)

        super().__init__(*args, **kwargs)

CreateView:

class CreateFeedback(LoginRequiredMixin, SelectRelatedMixin, generic.CreateView):

    form_class = FeedbackForm

    model = models.Feedback

    def form_valid(self, form):

        self.object = form.save(commit=False)

        self.object.user = self.request.user

        self.object.save()

        return super().form_valid(form)

Path in urls.py:

path('by/<username>/new',views.CreateFeedback.as_view(),name='create'),

Error:

ValueError at /feedback/by/feedback/new Cannot assign "<SimpleLazyObject: <User: feedback>>": "Feedback.user" must be a "User" instance.

Repository:

https://github.com/salonikalra/feedback

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