Book Image

Learn Web Development with Python

By : Fabrizio Romano, Gaston C. Hillar, Arun Ravindran
Book Image

Learn Web Development with Python

By: Fabrizio Romano, Gaston C. Hillar, Arun Ravindran

Overview of this book

If you want to develop complete Python web apps with Django, this Learning Path is for you. It will walk you through Python programming techniques and guide you in implementing them when creating 4 professional Django projects, teaching you how to solve common problems and develop RESTful web services with Django and Python. You will learn how to build a blog application, a social image bookmarking website, an online shop, and an e-learning platform. Learn Web Development with Python will get you started with Python programming techniques, show you how to enhance your applications with AJAX, create RESTful APIs, and set up a production environment for your Django projects. Last but not least, you’ll learn the best practices for creating real-world applications. By the end of this Learning Path, you will have a full understanding of how Django works and how to use it to build web applications from scratch. This Learning Path includes content from the following Packt products: • Learn Python Programming by Fabrizio Romano • Django RESTful Web Services by Gastón C. Hillar • Django Design Patterns and Best Practices by Arun Ravindran
Table of Contents (33 chapters)
Title Page
About Packt

Form processing with class-based views

We can essentially process a form by subclassing the View class itself:

class ClassBasedFormView(generic.View): 
    template_name = 'form.html' 
    def get(self, request): 
        form = PersonDetailsForm() 
        return render(request, self.template_name, {'form': form}) 
    def post(self, request): 
        form = PersonDetailsForm(request.POST) 
        if form.is_valid(): 
            # Success! We can use form.cleaned_data now 
            return redirect('success') 
            # Invalid form! Reshow the form with error highlighted 
            return render(request, self.template_name, 
                          {'form': form}) 

Compare this code with the sequence diagram that we saw previously. The three scenarios have been separately handled.


Every form is expected to follow the post/redirect/get (PRG) pattern. If the submitted form is found to be valid, then it must issue a redirect. This prevents duplicate form submissions...