How To Create Class-Based Delete Views in Django Example/ Django Delete View Example

Updated by Ashirafu Kibalama on May 03, 2024

Mastering Class-Based Delete Views in Django: A Step-by-Step Tutorial

Want to simplify deletion in your Django app? Class-Based Views (CBVs) offer a powerful and efficient solution.

This practical tutorial will use a real-world example to guide you through creating Class-Based Delete Views in Django.

Let's embark on this journey and elevate your Django development prowess!

Delete Method in Django Class-based views.

In Django's class-based views (CBVs), the delete method is a built-in method for handling HTTP DELETE requests to delete objects from a database.

This method is commonly used in Delete Views (DeleteView) to remove instances of a particular model.

Django's delete method is invoked when a DELETE request is made to a Delete View.

Within this method, Django typically retrieves the object to be deleted based on the URL parameters or the request data, performs any necessary validation or permission checks, and then deletes the object from the database.

#view.py function


def delete_product(request, id):
    product = Product.objects.get(id=id)

    if request.method == 'POST':
        product.delete()
        return redirect('myapp:index')

    return render(request, 'myapp/product-delete.html', {'product': product})

6 Steps To Create Class-Based Delete Views in Django Example

Step 1) Import Statements:


from django.views.generic import DeleteView
from django.urls import reverse_lazy

From Django.views.generic import DeleteView:

This imports the DeleteView class from Django's generic views. DeleteView is a class-based view provided by Django for deleting objects.

From Django, urls import reverse_lazy:

This imports reverse_lazy, a lazily evaluated version of reverse. It is used to reverse URL patterns.

Step 2) Model Definition:


class ProductDeleteView(DeleteView):
    model = Product

Model = Product:

This specifies the model with which the DeleteView will interact. In this case, it's the Product model imported from myapp.models.

Step 3) Template Name:

class ProductDeleteView(DeleteView):
    model = Product
    template_name = 'myapp/product-delete.html'

template_name = 'myapp/product-delete.html':

This specifies the template that will be rendered when the view is accessed. In this case, it's 'myapp/product-delete.html'.

Step 4) Success URL:


class ProductDeleteView(DeleteView):
    model = Product
    template_name = 'myapp/product-delete.html'
    success_url = reverse_lazy('myapp:index')

success_url = reverse_lazy('myapp:index'):

This specifies the URL to redirect to after the object is successfully deleted. reverse_lazy is used to reverse the URL pattern 'myapp:index', presumably pointing to your application's index page.

Step 5) Customizing Object Retrieval:


class ProductDeleteView(DeleteView):
   
    
    # Other Codes Here
    
    def get_object(self, queryset=None):
        return Product.objects.get(id=self.kwargs['id'])

def get_object(self, queryset=None)::

This method is overridden to customize how the object to be deleted is retrieved.

return Product.objects.get(id=self.kwargs['id']):

It retrieves the specific Product instance based on the ID extracted from the URL kwargs (self.kwargs['id']).

This overrides DeleteView's default behaviour, which would use self.get_queryset().get(pk=pk) to retrieve the object.

Step 6) Update the URL pattern to use the class-based view.

#before


from django.urls import path
from .import views

urlpatterns = [
    # Other URL patterns...

    
    # Delete Products
    path('delete/<int:id>/', views.delete_product, name='delete_product'),

    # Other URL patterns...
]

#after


from django.urls import path
from .import views

urlpatterns = [
    # Other URL patterns...


    # Delete Products
    # path('delete/<int:id>/', views.delete_product, name='delete_product'),
    path('delete/<int:id>/', views.ProductDeleteView.as_view(), name='delete_product'),

    # Other URL patterns...
]

This code snippet defines a URL pattern that maps to the ProductDeleteView class-based view.

When a request is made to the URL product/{id}/delete/, it will trigger the ProductDeleteView, which will delete the specified Product instance.

#views.py


# def delete_product(request, id):
#     product = Product.objects.get(id=id)
#
#     if request.method == 'POST':
#         product.delete()
#         return redirect('myapp:index')
#
#     return render(request, 'myapp/product-delete.html', {'product': product})
#

class ProductDeleteView(DeleteView):
    model = Product
    template_name = 'myapp/product-delete.html'
    success_url = reverse_lazy('myapp:index')
    
    def get_object(self, queryset=None):
        return Product.objects.get(id=self.kwargs['id'])

Conclusion:

This class-based view simplifies creating a view for deleting Product instances.

It handles standard functionalities such as rendering the appropriate template, confirming deletion, and redirecting to a successful URL after deletion.

"We would appreciate it if you could review the post and share your valuable feedback.

Thank you, and have a great time coding!"

2 How To Create a Class-Based Update View in Django Example/ UpdateView Django Example

Other Posts:

1 Fix NoReverseMatchat /food/ Reverse for 'edit_product' with arguments '('',)' not found. 1 pattern(s) tried: ['food/edit/(?P<pk>[0-9]+)/\\Z']

2 'From' Keyword is not Supported in This Version of The Language Python Pycharm/ Vscode Fix.

3 Pycharm Pip Install Not Working/ Pip The term 'pip' is not Recognized as the Name of a Cmdlet Pycharm

4 How To Fix: Django image not showing from Database / Django Image, not Found Python.

5 Fix: Django Method not Allowed (get): /logout/ Method not Allowed: /logout/ Logout Method not Working Django Python

6 How To Fix: Your Session Cookie is Invalid. Please Log in Again./ Why is cPanel Login Invalid?

7 Why is there no terminal in cPanel?/ Enable Terminal in Cpanel on Shared Hosting like Namecheap

8 How To Access Your cPanel Website With an IP Address?/ What is the IP Address of Your cPanel Server?