filter category Django - django

Question

I want to make a button to filter product by category.. Example Salad or Meat. Without Model ProductAtribuut im able to do it, but now i added the model, so im real confused how i can get the data of a Foreign Key inside a Foreign Key
ProductAtribuut -> Product(FK) -> Categorie(FK)
Models.py
class Categorie(models.Model):
naam = models.CharField(max_length=150,db_index=True)
slug = models.SlugField(unique=True)
class MPTTMeta:
order_insertion_by = ['naam']
class Meta:
ordering=('-naam',)
def __str__(self):
return self.naam
def get_absolute_url(self):
return reverse('JavaKitchen:product_by_categorie', args=[self.slug])
#property
def get_products(self):
return Product.objects.filter(categorie__naam=self.naam)
class Groente(models.Model):
groente = models.CharField(max_length=100)
def __str__(self):
return self.groente
class Vlees(models.Model):
vlees = models.CharField(max_length=100)
def __str__(self):
return self.vlees
class Product(models.Model):
slug = models.SlugField(unique=True, primary_key=True)
titel = models.CharField(max_length=200)
beschrijving = models.TextField(blank=True, null=True)
categorie = models.ForeignKey(Categorie, on_delete=models.CASCADE)
class Meta:
ordering=('-titel',)
def __str__(self):
return self.titel
def get_title_uppercase(self):
return self.titel.upper()
def get_absolute_url(self):
return reverse('JavaKitchen:product_detail',args=[self.id,])
class ProductAtribuut(models.Model):
def groente():
return Groente.objects.filter(groente='geen').first()
def vlees():
return Vlees.objects.filter(vlees='geen').first()
product = models.ForeignKey(Product, on_delete=models.CASCADE, blank=False)
groente = models.ForeignKey(Groente, on_delete=models.CASCADE, default=groente)
vlees = models.ForeignKey(Vlees, on_delete=models.CASCADE, default=vlees)
prijs = models.FloatField(default=0)
afbeelding = models.ImageField(blank=True, upload_to='gerechten/') #later upgrade..
zichtbaar = models.BooleanField(default=True)
def __str__(self):
return self.product.titel
def image_tag(self):
return mark_safe('<img src="/media/%s" width="80" height="auto" />' % (self.afbeelding))
image_tag.short_description = 'Image'
Views.py
def product_list(request,categorie_slug=None):
categorie = None
javakitchen = JavaKitchen.objects.get(id=1)
openings_tijden = Openings_tijden.objects.all()
categories = Categorie.objects.all().filter(zichtbaar=True)
product = Product.objects.all()
productatribuut = ProductAtribuut.objects.all().filter(zichtbaar=True)
if categorie_slug:
categorie = get_object_or_404(Categorie,slug=categorie_slug)
product = productatribuut.filter(product=product)
context = { 'categories':categories,
'categorie':categorie,
'product':product,
'form':form,
'javakitchen':javakitchen,
'openings_tijden': openings_tijden,
'productatribuut': productatribuut
}
return render(request, 'pages/index.html', context)
HTML template
<div class="categories">
<h1>{% if categorie %}{{ categorie.naam }}{% else %} ALLE GERECHTEN {% endif %}</h1>
<ol class="type">
<li><a class="page-scroll" href='{% url "JavaKitchen:product_list" %}#dinner'>Alles</a></li>
{% for c in categories %}
<li><a class="page-scroll" href="{{ c.get_absolute_url }}#dinner">{{ c.naam }}</a></li>
{% endfor %}
</ol>
<div class="clearfix"></div>
</div>
I used this before to get the category. when i didnt have class ProductAtribuut
if categorie_slug:
categorie = get_object_or_404(Categorie,slug=categorie_slug)
product = product.filter(categorie=categorie)
but now i dont know how i do get the category
ProductAtribuut -> Product(fk) -> Categorie(fk)