MODEL: class Item(models.Model): title = models.CharField(max_length=250) price = models.IntegerField() discount_price = models.IntegerField(null=True, blank=True) description = HTMLField() category = models.CharField(choices=CATEGORY_CHOICES, max_length=2) label = models.CharField(choices=LABEL_CHOICES, max_length=1) slug = models.SlugField(unique=True,max_length=250) def __str__(self): return self.title def get_absolute_url(self): return reverse("product-detail", kwargs={ 'slug': self.slug }) def get_add_to_cart_url(self): return reverse("add-to-cart", kwargs={ 'slug': self.slug }) def get_remove_from_cart_url(self): return reverse("remove-from-cart", kwargs={ 'slug': self.slug }) class VariationManager(models.Manager): def all(self): return super(VariationManager, self).filter(active=True) def sizes(self): return self.all().filter(category='size') def colors(self): return self.all().filter(category='color') VAR_CATEGORIES = ( ('size', 'size'), ('color', 'color'), ('package', 'package'), ) class Variation(models.Model): item = models.ForeignKey(Item, on_delete=models.CASCADE) category = models.CharField(max_length=120, choices=VAR_CATEGORIES, default='size') title = models.CharField(max_length=120) active = models.BooleanField(default=True) objects = VariationManager() def __str__(self): return self.title def get_add_to_cart_url(self): return reverse("add-to-cart", kwargs={ 'slug': self.slug }) def get_remove_from_cart_url(self): return reverse("remove-from-cart", kwargs={ 'slug': self.slug }) class OrderItem(models.Model): user = models.ForeignKey(User, on_delete=models.CASCADE) ordered = models.BooleanField(default=False) item = models.ForeignKey(Item, on_delete=models.CASCADE) quantity = models.IntegerField(default=1) variation = models.ManyToManyField(Variation) def __str__(self): return f"{self.quantity} of {self.item.title}" def get_total_item_price(self): return self.quantity * self.item.price def get_total_discount_item_price(self): return self.quantity * self.item.discount_price def get_amount_saved(self): return self.get_total_item_price() - self.get_total_discount_item_price() def get_final_price(self): if self.item.price:#self.item.discount_price: return self.get_total_item_price()#self.get_total_discount_item_price() #return self.get_total_item_price() class Order(models.Model): user = models.ForeignKey(User, on_delete=models.CASCADE) items = models.ManyToManyField(OrderItem) start_date = models.DateTimeField(auto_now_add=True) ordered_date = models.DateTimeField() ordered = models.BooleanField(default=False) def __str__(self): return self.user.username def get_total(self): total = 0 for order_item in self.items.all(): total += order_item.get_final_price() return total VIEWS.PY: def add_to_cart(request,slug): item = get_object_or_404(Item,slug=slug) order_item_qs = OrderItem.objects.filter( item=item, user=request.user, ordered=False ) item_var = [] #item variation if request.method == 'POST': for items in request.POST: key = items val = request.POST[key] try: v = Variation.objects.get( item=item, category__iexact=key, title__iexact=val ) item_var.append(v) except: pass if len(item_var) > 0: #order_item_qs.variation.clear() for items in item_var: order_item_qs = order_item_qs.filter( variation__exact=items, ) if order_item_qs.exists(): order_item = order_item_qs[0] # for order_item in order_item_qs: # order_item = order_item_qs.first() order_item.quantity += 1 order_item.save() #print(order_item_qs) else: order_item = OrderItem.objects.create( item=item, user=request.user, ordered=False ) order_item.variation.add(*item_var) order_item.save() order_qs = Order.objects.filter(user=request.user, ordered=False) if order_qs.exists(): order = order_qs[0] #check if the order item is in the order if not order.items.filter(item__id=order_item.id).exists(): order.items.add(order_item) messages.info(request, "This item quantity was updated.") return redirect("order-summary") else: ordered_date = timezone.now() order = Order.objects.create(user=request.user, ordered_date=ordered_date) order.items.add(order_item) messages.info(request, "This item was added to cart.") return redirect("order-summary") TEMPLATE (Order Summary): <div class="quantity buttons_added"> <a href="{% url 'remove-single-item-from-cart' order_item.item.slug %}"><input type="button" value="-" class="minus"></a> <input type="number" value="{{ order_item.quantity }}" title="Qty" class="input-text qty text" size="4" pattern="" inputmode=""> <a href="{% url 'add-to-cart' order_item.item.slug %}"> <input type="button" value="+" class="plus"></a> </div> TEMPLATE (Product details): <form class="form" method="POST" action="{{ items.get_add_to_cart_url }}"> {% csrf_token %} <input class="btn btn-default btn-block" type="submit" value="Add to cart"> {% if items.variation_set.all %} {% if items.variation_set.sizes %} <select class="form-control" name="size"> {% for items in items.variation_set.sizes %} <option value="{{ items.title|lower }}">{{ items.title|capfirst }}</option> {% endfor %} </select> {% endif %} {% if items.variation_set.colors %} <select class="form-control" name="color"> {% for items in items.variation_set.colors %} <option value="{{ items.title|lower }}">{{ items.title|capfirst }}</option> {% endfor %} </select> {% endif %} {% endif %} </form>You received this message because you are subscribed to the Google Groups "Django users" group.
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