Update Product Quantity from Cart Page in E-commerce Website using Django | EP. 30

In this episode, we will learn how to update the product quantity from the cart page in an e-commerce website using Django. This feature is crucial for customers who want to adjust the quantities of products in their shopping carts before proceeding to checkout.

First, we need to create a form in the cart page where users can input the desired quantity for each product. We can use HTML input tags with the type “number” to create a number input field for each product in the cart. For example:

<form action="{% url 'update_product_quantity' %}" method="post">
  {% csrf_token %}
  <input type="hidden" name="product_id" value="{{ product.id }}">
  <input type="number" name="quantity" value="{{ product.quantity }}" min="1" max="10">
  <input type="submit" value="Update Quantity">
</form>

Next, we need to create a view in Django that handles the form submission and updates the product quantity in the cart. We can fetch the product ID and new quantity from the submitted form data, fetch the corresponding product from the database, and update its quantity field. For example:

def update_product_quantity(request):
  if request.method == 'POST':
    product_id = request.POST.get('product_id')
    quantity = request.POST.get('quantity')
    
    product = Product.objects.get(id=product_id)
    product.quantity = quantity
    product.save()
    
    return redirect('cart')

Finally, don’t forget to add a URL pattern for the update_product_quantity view in your Django project’s urls.py file. For example:

urlpatterns = [
  path('update_product_quantity/', views.update_product_quantity, name='update_product_quantity'),
]

With these steps, you can now allow customers to easily update the quantity of products in their shopping carts on your e-commerce website. This feature enhances the user experience and makes it more convenient for customers to manage their shopping carts before checking out.