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Start your free trialNthulane Makgato
Courses Plus Student 19,602 PointsCustom User Model not passing
I have checked the documentation for creating a "has_perm" and a "form_valid" but the code is not passing. Please help.
from django.core.urlresolvers import reverse
from django.db import models
class Product(models.Model):
name = models.CharField(max_length=255)
description = models.TextField()
price = models.DecimalField()
discount = models.DecimalField(blank=True, null=True)
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse("products:detail", kwargs={"pk": self.pk})
class Meta:
permissions = (
("can_give_discount", "Can Give Discount"),
)
from django.contrib.auth.mixins import LoginRequiredMixin
from django.views import generic
from djando.contrib.auth import has_perm
from . import models
class List(generic.ListView):
model = models.Product
class Detail(generic.DetailView):
model = models.Product
class Create(LoginRequiredMixin, generic.CreateView):
fields = ("name", "description", "discount", "price")
model = models.Product
def form_valid(self, form):
user = self.request.user
if not user.has_perm(products.can_give_discount):
self.object.discount = 0
self.object = form.save()
return super(form_valid, self).form_valid(form)
7 Answers
Chris Freeman
Treehouse Moderator 68,457 PointsThere are three errors in your code:
Before the if
statement, define the self.object
:
self.object = form.save(commit=False) # <-- create self.object to modify
After the if
statement, save the self.object
:
self.object.save() # <-- Save object
Call the parent class from super()
not the method:
return super(Create, self).form_valid(form) # <-- refer to the parent class
Otherwise, your code will pass. Post back if you need more help. Good Luck!!
Kenneth Love
Treehouse Guest TeacherOK, assuming these are your two pieces of code:
models.py
from django.core.urlresolvers import reverse
from django.db import models
class Product(models.Model):
name = models.CharField(max_length=255)
description = models.TextField()
price = models.DecimalField()
discount = models.DecimalField(blank=True, null=True)
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse("products:detail", kwargs={"pk": self.pk})
class Meta:
permissions = (
("can_give_discount", "Can Give Discount"),
)
views.py
from django.contrib.auth.mixins import LoginRequiredMixin
from django.views import generic
from djando.contrib.auth import has_perm
from . import models
class List(generic.ListView):
model = models.Product
class Detail(generic.DetailView):
model = models.Product
class Create(LoginRequiredMixin, generic.CreateView):
fields = ("name", "description", "discount", "price")
model = models.Product
def form_valid(self, form):
user = self.request.user
self.object = form.save(commit=False)
if not user.has_perm("products.can_give_discount"):
self.object.discount = 0
self.object.save()
return super(Create, self).form_valid(form)
There are two problems in views.py
.
First, you have from djando
. This should be from django
. But, secondly, you're trying to import has_perm
which doesn't need to be imported at all so just delete the whole line. Once you delete that line, everything seems to pass for me on the first try.
I'm not sure how Chris was getting the pass, though. My checks on this are just straight unit tests making a couple of users, both with and without the correct permission, and checking to see if they can create a discount or not.
Chris Freeman
Treehouse Moderator 68,457 PointsThe weirdest part is I hadn't been using the whole posts when testing, but only cut-and-pasting the Meta
and method parts as needed and had not used the import parts. Now I can't get it fail again as I had just done in my test case. Feels like gaslighting but I'll let it go. Another entry for The Journal of Irreproducible Results!
Thanks for looking into it.
Nthulane Makgato
Courses Plus Student 19,602 PointsHi Chris Freeman, thanks for your assistance but the code still doesn't pass with your changes.
"Bummer! A user without the right permission created a discounted product"
I'm hoping that I have not made a foolish mistake. Look forward to your response!
from django.contrib.auth.mixins import LoginRequiredMixin
from django.views import generic
from djando.contrib.auth import has_perm
from . import models
class List(generic.ListView):
model = models.Product
class Detail(generic.DetailView):
model = models.Product
class Create(LoginRequiredMixin, generic.CreateView):
fields = ("name", "description", "discount", "price")
model = models.Product
def form_valid(self, form):
user = self.request.user
self.object = form.save(commit=False)
if not user.has_perm(products.can_give_discount):
self.object.discount = 0
self.object.save()
return super(Create, self).form_valid(form)
Chris Freeman
Treehouse Moderator 68,457 PointsYou almost have it. The permission argument to has_perm()
should be in quotes.
Nthulane Makgato
Courses Plus Student 19,602 PointsChris Freeman, amazingly, its still not working.
Chris Freeman
Treehouse Moderator 68,457 PointsThank you for your tenacity! I apologize for the frustration. I am very frustrated my self. Please see my other answer posted below and tagged Kenneth to look more deeply into the issue.
Chris Freeman
Treehouse Moderator 68,457 PointsThere is some very non-deterministic behavior happening here. I tested your latest solution (fixing the missing quotes) and it Fails. So I try to cut and paste my know passing solution and IT fails repeatedly after many attempts (with same solution - crazy but bear with me). Reloading the challenge webpage made no difference.
I then hit the challenge Restart button and tried your corrected code and it passed! I then tried my known good solution again and it passed!!.
So Kenneth Love, Please do the following:
- cut and paste Nthulane Makgato
class Meta
solution to task 1 --> It will pass - cut and past their latest try (without correcting the quote marks) --> it will fail
- correct the quote marks and it still fails
- Hit challenge Restart button
- cut and paste Nthulane Makgato
class Meta
solution to task 1 --> It will pass - cut and past their latest try, but this time correct the missing quote marks first --> it will *pass
This is crazy making that one has to hit the Restart if a failing attempt happens on the way to the correct solution. Please verify there isn't some sticky status bit or caching issue causing the insanity.
Nthulane Makgato
Courses Plus Student 19,602 PointsIt finally passed thanks Chris Freeman and Kenneth Love for all your help!! Not that "Best Answers" mean anything but if I could give each of you a best answer I would :)
Stephen Hutchinson
8,426 PointsThis one is quite tricky...my first attempt was:
def form_valid(self, form):
if not self.request.user.has_perm("products.can_give_discount"):
self.object.discount = 0
self.object.save()
return super().form_valid(form)
I was unaware of all these intricacies that made wthe working code:
def form_valid(self, form):
user = self.request.user
self.object = form.save(commit=False)
if not user.has_perm("products.can_give_discount"):
self.object.discount = 0
self.object.save()
return super(Create, self).form_valid(form)