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 <aadil10121...@gmail.com>
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., <parul.281...@gmail.com> 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>
>>
>>
>>
>>
>>
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>> .
>>
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