Django - Add products to favorite list

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I am building a supermarket store, using Django. I have to give user the possibility to add/remove items to/from the Favourite list. So far i have done the following models.py

class Product(models.Model):
    category = models.ForeignKey('Category', null=True, blank=True,
                                 on_delete=models.SET_NULL)
    
    sku = models.CharField(max_length=254, null=True, blank=True)
    name = models.CharField(max_length=254)
    description = models.TextField()
    price = models.DecimalField(max_digits=6, decimal_places=2)
    rating = models.DecimalField(max_digits=6, decimal_places=1, null=True,
                                 blank=True)
    image_url = models.URLField(max_length=1024, null=True, blank=True)
    image = models.ImageField(null=True, blank=True)
    favourites = models.ManyToManyField(User, related_name='favourites', blank=True)

    def __str__(self):
        return self.name

i created favourites folder and in the folder i have:

views.py

def favourites(request, product_id):

    product = get_object_or_404(Product, pk=product_id)
    if product.favourites.filter(id=request.user.ide).exist():
        product.favourites.remove(request.user)
    else:
        product.favourites.add(request.user)
        
    
    return render(request, 'favourites/product_favourite_list.html')


def product_favourite_list(request):
    user=request.user
    favourite_products = user.favourites.all()
    
    context = {
        'favourite_products': favourite_products
    }

    return render(request, 'favourites/product_favourite_list.html', context)

urls.py

urlpatterns = [
path('', views.favourites, name='favourites'),
path('favourites/', views.product_favourite_list, name='product_favourite_list'),

]

in product_details i have

def product_detail(request, product_id):
    """ A view to show individual product details """
    
    product = get_object_or_404(Product, pk=product_id)
    is_favourite = False
    
    if product.favourites.filter(id=request.user.id).exists():
        is_favourite = True
    
        
    context = {
        'product': product,
        'is_favourite': is_favourite,
    }

return render(request, 'products/product_detail.html', context)

product_details HTML has the following links

{% if is_favourite%}
        <a href="{% url 'product_favourite_list' id=product.id %}">
          <i class="fas fa-heart fa-lg"></i>
        </a>
      {% else %}
        <a href="{% url 'product_favourite_list' id=product.id %}">
          <i class="far fa-heart fa-lg"></i>
        </a>
      {% endif %}

i can see the favourites page. when I click on individual products. I get the error as per the attached snapshoterror_message

Hope somebody can help. thanks in advance

django python
1 Answers

You provide product.id to url product_favourite_list

<a href="{% url 'product_favourite_list' id=product.id %}">

So you should do:

<a href="{% url 'product_favourite_list' %}">

You can also adjust urlpatterns, but I guess it doesn't make sense because you are showing all favourite products of user.

If you should have id in product_favourite_list add it to the path:

path('favourites/<int:id>/', views.product_favourite_list, name='product_favourite_list'),

Also add id as argument to your view:

def product_favourite_list(request, id):
    ...
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