'WSGIRequest' object has no attribute 'profile'

I want to add a subject into a particular id using generic CreatView, i keeping getting errors 'WSGIRequest' object has no attribute 'profile'. Please need help on how to resolve this.

models.py

class Course(models.Model):
    profile = models.ForeignKey(Profile, on_delete=models.CASCADE, null=True)
    subject = models.CharField(max_length=20)
    score = models.CharField(max_length=20)
    grade = models.CharField(max_length=20)

    def get_absolute_url(self,):
        return reverse('student:detail', kwargs={'pk': self.pk})

class Profile(models.Model):
    firstName = models.CharField(max_length=30)
    middleName = models.CharField(max_length=30)
    lastName = models.CharField(max_length=30)
    dob = models.DateField(blank=True, null=True)
    stud_id = models.CharField(max_length=5000)
    gender = models.CharField(max_length=10)
    parentsName =models.CharField(max_length=30)
    address = models.CharField(max_length=250)
    lga = models.CharField(max_length=250)
    Religion = models.CharField(max_length=50)
    email = models.EmailField(max_length=70, null=True, blank=True, unique=True)
    phone = models.CharField(max_length=11, unique=True)
    photo = models.FileField()
    Comment = models.CharField(max_length=250)

    def get_absolute_url(self):
        return reverse('student:detail', kwargs={'pk': self.pk})

    def __str__(self):
        return self.firstName

views.py

#Add Subject section
class CourseCreate(CreateView):
    model = Course
    form_class = CourseForm
    template_name = 'student/course_form.html'

    def form_valid(self, form):
        form.instance.profile = self.request.profile
        form.instance.profile = Profile.objects.get(pk=self.kwargs['pk'])
        return super().form_valid(form)

forms.py

class CourseForm(forms.ModelForm):

    class Meta:
        model = Course
        fields = ['subject', 'score', 'grade']

urls.py

url(r'^course_form/(?P<pk>[0-9]+)/$', views.CourseCreate.as_view(), name='course_form'),

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