Pass I'd to the view you are you are using, And then get products thrid that I'd by simple ORM quriy
Product = model name.objects.get(id=id) On Wed, 23 Jun, 2021, 11:35 PM Parul., <[email protected]> wrote: > Hi, > I am working on an ecommerce website. I am facing an error. Can anyone > please help me solve this error. > I am not able to fetch the PRODUCT_ID > > 1. views.py (APP-CART) > > ------------------------------------------------------------------------------------------------------- > from django.shortcuts import render,redirect > from .models import Cart > from new_app.models import Product > > # Create your views here. > > > def cart_home(request): > > cart_obj,new_obj=Cart.objects.new_or_get(request) > products=Cart.objects.all() > > > > return render(request,'carts/home.html',{}) > > > def cart_update(request): > print(request.POST) > # print(dict(request.POST.items())) > # print("in func") > > product_id=1 > print('id below') > print(product_id) // not able to get the value of product id in > console > product_obj=Product.objects.get(id=product_id) > cart_obj,new_obj=Cart.objects.new_or_get(request) > if product_obj in cart_obj.products.all(): > cart_obj.products.remove(product_obj) > else: > cart_obj.products.add(product_obj) > return redirect('home') > > > > > -------------------------------------------------------------------------------------------- > 2. models.py (cart) > > > from django.db import models > from django.conf import settings > from new_app.models import Product > from django.db.models.signals import pre_save,post_save,m2m_changed > > > > User=settings.AUTH_USER_MODEL > > class CartManager(models.Manager): > def new_or_get(self,request): > cart_id=request.session.get("cart_id",None) > # qs=self.get_queryset().filter(id=cart_id) > qs=self.get_queryset().only('products') > > print(qs) > if qs.count()==1: > new_obj=False > cart_obj=qs.first() > print('cart obj below') > print(cart_obj) > if request.user.is_authenticated and cart_obj.user is None: > > cart_obj.user=request.user > cart_obj.save() > > > else: > cart_obj=Cart.objects.new_cart(user=request.user) > new_obj=True > request.session['cart_id']=cart_obj.id > return cart_obj,new_obj > > def new_cart(self,user=None): > user_obj=None > if user is not None: > if user.is_authenticated: > user_obj=user > return self.model.objects.create(user=user_obj) > > class Cart(models.Model): > > user=models.ForeignKey(User,null=True,blank=True,on_delete=models.CASCADE) > products=models.ManyToManyField(Product,blank=True) > > subtotal=models.DecimalField(default=0.00,max_digits=100,decimal_places=2) > > total=models.DecimalField(default=0.00,max_digits=100,decimal_places=2) > timestamp=models.DateTimeField(auto_now_add=True) > updated=models.DateTimeField(auto_now=True) > > objects=CartManager() > > def __str__(self): > return str(self.id) > > > def m2m_changed_cart_receiver(sender,instance,action,*args,**kwargs): > print(action) > if action=='post_add' or action=='post_remove' or action=='clear': > products=instance.products.all() > total=0 > for x in products: > total += x.price > if instance.subtotal != total: > instance.subtotal=total > instance.save() > m2m_changed.connect(m2m_changed_cart_receiver,sender=Cart.products.through) > > > def pre_save_cart_receiver(sender,instance,*args,**kwargs): > if instance.subtotal>0: > instance.total=instance.subtotal + 10 > else: > instance.total=0.00 > > pre_save.connect(pre_save_cart_receiver,sender=Cart) > > > > > OUTPUT IN CONSOLE: > > <QueryDict: {'csrfmiddlewaretoken': > ['FMk2gTq6XXxZ2HU40I6h4b3WtPl59Drf1urwUNufDZUeSFPMzGNwU4L1QuGCiCbB'], > 'product_id': > ['']}> -------- GETTING EMPTY DICTIONARY INSTEAD OF GETTING PRODUCT > ID i.e. 1 > id below > 1 > <QuerySet [<Cart: 13>]> > > > So, I am unable to fetch the productc id there besides the csrf.... > i tried to individually print the product id.. which came as 1...(written > under"id below" in output) > > Can anyone pls help me with this. > > > > > Also, adding update_cart.html > <form method='POST' action='{% url 'update' %}'class="form ">{% csrf_token > %} > <input type="hidden" name='product_id' vallue= "{{ product_id }}"> > {% if product in cart.products.all %} > <button type="submit" class="btn btn-link">remove</button> > {% else %} > <button type="submit" class="btn btn-success">add to cart</button> > {% endif %} > > </form> > > > > > > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/django-users/CAHjHRFpf_EfU%3DSSFFTMOeb5JkuNKL%3DuSNVtp782A2r_R-M0_DA%40mail.gmail.com > <https://groups.google.com/d/msgid/django-users/CAHjHRFpf_EfU%3DSSFFTMOeb5JkuNKL%3DuSNVtp782A2r_R-M0_DA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Django users" group. 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