First pass Id as an argument along with request to that particular view function
On Thu, 24 Jun, 2021, 12:06 AM Parul., <[email protected]> wrote: > Hi , > > I am doing : product_obj=Product.objects.get(id=product_id) > in the cart_update function in views.py > > but when trying to print this object... i am not getting anything... is > this function is not working? > > > On Wed, Jun 23, 2021 at 11:38 PM Aadil Rashid <[email protected]> > wrote: > >> 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. >> 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/CAAYXZx-x2ymvZ2sWiLK9RoEdxZJWa8-5po%2BtJqu04z9UB7cqkA%40mail.gmail.com >> <https://groups.google.com/d/msgid/django-users/CAAYXZx-x2ymvZ2sWiLK9RoEdxZJWa8-5po%2BtJqu04z9UB7cqkA%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- > 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/CAHjHRFpn9RjG6ZJzVs3k4oVie-fp8%2BQ%3D8hqBh-bRxHUBMrCMZA%40mail.gmail.com > <https://groups.google.com/d/msgid/django-users/CAHjHRFpn9RjG6ZJzVs3k4oVie-fp8%2BQ%3D8hqBh-bRxHUBMrCMZA%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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