"Uncaught ReferenceError: user is not defined at" in Django

Question

I am trying to make an e-commerce website by following the guide of Dennis Ivy in YouTube. But in applying some logic in the checkout form, I've been facing an error that says "Uncaught ReferenceError: user is not defined at".

["Uncaught ReferenceError: user is not defined at" in the console]

What I want to do is remove the 'user-info' if the user is not "AnonymousUser". And remove the 'form' if you don't need to ship the products (digital) and the user is not "AnonymousUser" to only show the 'payment-info'.

Here's the checkout.html code:

{% extends 'store/main.html' %}
{% load static %}
{% block content %}
 
    
        
            
                
                    
                        
                    
                    
                        
                    
                
                
                
                    
                    Shipping Information:
                    
                    
                        
                    
                    
                        
                    
                    
                        
                    
                    
                        
                    
                    
                        
                    
                

                
                
            
        

        

        
            Paypal Options
            
        
        
    

    
        
            ← Back to Cart
            
            Order Summary
            
            {% for item in items %}
                
                    
                    {{item.product.name}}
                    ₱{{item.product.price|floatformat:2}}
                    x{{item.quantity}}
                
            {% endfor %}
            Items:   {{order.get_cart_items}}
            Total:   ₱{{order.get_cart_total|floatformat:2}}
        
    




{% endblock content %}

Here's the models.py file:

from django.db import models
from django.contrib.auth.models import User

# Create your models here.

class Customer(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE, null=True, blank=True)
    name = models.CharField(max_length=200, null=True)
    email = models.CharField(max_length=200)

    def __str__(self):
        return self.name

class Product(models.Model):
    name = models.CharField(max_length=200)
    price = models.FloatField()
    digital = models.BooleanField(default=False, null=True, blank=True)
    image = models.ImageField(null=True, blank=True)

    def __str__(self):
        return self.name

    @property
    def imageURL(self):
        try:
            url = self.image.url 
        except:
            url = ''
        return url

class Order(models.Model):
    customer = models.ForeignKey(Customer, on_delete=models.CASCADE, null=True, blank=True)
    date_ordered = models.DateTimeField(auto_now_add=True)
    complete = models.BooleanField(default=False)
    transaction_id = models.CharField(max_length=20, null=True)

    def __str__(self):
        return str(self.id)

    @property
    def shipping(self):
        shipping = False
        orderitems = self.orderitem_set.all()
        for i in orderitems:
            if i.product.digital == False:
                shipping = True
        return shipping

    @property
    def get_cart_total(self):
        orderitems = self.orderitem_set.all()
        total = sum([item.get_total for item in orderitems])
        return total

    @property
    def get_cart_items(self):
        orderitems = self.orderitem_set.all()
        total = sum([item.quantity for item in orderitems])
        return total

class OrderItem(models.Model):
    product = models.ForeignKey(Product, on_delete=models.SET_NULL, null=True)
    order = models.ForeignKey(Order, on_delete=models.SET_NULL, null=True)
    quantity = models.IntegerField(default=0, null=True, blank=True)
    date_added = models.DateTimeField(auto_now_add=True)

    @property
    def get_total(self):
        total = self.product.price * self.quantity
        return total

class ShippingAddress(models.Model):
    customer = models.ForeignKey(Customer, on_delete=models.SET_NULL, null=True)
    order = models.ForeignKey(Order, on_delete=models.SET_NULL, null=True)
    address = models.CharField(max_length=200, null=False)
    city = models.CharField(max_length=200, null=False)
    state = models.CharField(max_length=200, null=False)
    zip = models.CharField(max_length=200, null=False)
    date_added = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return self.address

Here's the views.py file:

from itertools import product
from django.http import JsonResponse
from django.shortcuts import render
from .models import *
import json

def store(request): 

    if request.user.is_authenticated:
        customer = request.user.customer
        order, created = Order.objects.get_or_create(customer=customer, complete=False)
        items = order.orderitem_set.all()
        cartItems = order.get_cart_items

    else:
        items = []
        order = {'get_cart_total':0, 'get_cart_items':0, 'shipping': False}
        cartItems = order['get_cart_items']

    products = Product.objects.all()
    context = {'products':products, 'items':items, 'cartItems': cartItems}
    return render(request, 'store/store.html', context)

def cart(request):

    if request.user.is_authenticated:
        customer = request.user.customer
        order, created = Order.objects.get_or_create(customer=customer, complete=False)
        items = order.orderitem_set.all()
        cartItems = order.get_cart_items

    else:
        items = []
        order = {'get_cart_total':0, 'get_cart_items':0, 'shipping': False}
        cartItems = order['get_cart_items']

    context = {'items':items, 'order':order, 'cartItems': cartItems}
    return render(request, 'store/cart.html', context)

def checkout(request):
    
    if request.user.is_authenticated:
        customer = request.user.customer
        order, created = Order.objects.get_or_create(customer=customer, complete=False)
        items = order.orderitem_set.all()
        cartItems = order.get_cart_items

    else:
        items = []
        order = {'get_cart_total':0, 'get_cart_items':0, 'shipping': False}
        cartItems = order['get_cart_items']

    context = {'items':items, 'order':order, 'cartItems': cartItems}
    return render(request, 'store/checkout.html', context)

def updateItem(request):
    data = json.loads(request.body)
    productId = data['productId']
    action = data['action']
    print('Action:', action)
    print('Product:', productId)

    customer = request.user.customer
    product = Product.objects.get(id=productId)
    order, created = Order.objects.get_or_create(customer=customer, complete=False)

    orderItem, created = OrderItem.objects.get_or_create(order=order, product=product)

    if action == 'add':
        orderItem.quantity = (orderItem.quantity + 1)
    elif action == 'remove':
        orderItem.quantity = (orderItem.quantity - 1)

    orderItem.save()

    if orderItem.quantity <= 0:
        orderItem.delete()

    return JsonResponse('Item was added', safe=False)

I think the JavaScript at the bottom of checkout.html is asking for the user in this part:

var shipping = '{{order.shipping}}'

    if(shipping == 'False'){
        document.getElementById('shipping-info').innerHTML = ''
    }

    if (user != 'AnonymousUser'){
        document.getElementById('user-info').innerHTML = ''
    }

    if (shipping == 'False' && user != 'AnonymousUser'){
        //Hide entire form if user is logged in and shipping is false
        document.getElementById('form-wrapper').classList.add('hidden');
        //Show payment if logged in user wants to buy an item that does not require shipping
        document.getElementById('payment-info').classList.remove('hidden');
    }

How can I get rid of that error and apply the logic that I want?

user_10951070 · Answer

Just like you did in your view, the way to check to see if a user is anonymous or not is to use the request.user.is_authenticated, instead of checking to see if the user equals the string 'AnonymousUser'. So replace all instances of if user != 'AnonymousUser': in your HTML and JavaScript with if request.user.is_authenticated or perhaps even user.is_authenticated. Check out the docs on this.

Now as far as the new error, it might just mean you're using the wrong syntax in the Javascript. Here's how it needs to be done (this is only an example, you'll need to replace all instances like this one:

if ({% request.user.is_authenticated %}){
        document.getElementById('user-info').innerHTML = ''
    }

Note the {% %} to tell Django to replace the contents within with the variable, in this case request.user.is_authenticated.

user_18385447 · Answer

In checkout.html change the AnonymousUser to the user !=' False' it will work.

"Uncaught ReferenceError: user is not defined at" in Django

2 Answers