How Django processes a request (URL → View → Template) - Practice Exercises

Challenge - 5 Problems

❓ component_behavior

intermediate

What happens when Django matches a URL pattern?

When a user visits a URL, Django tries to find a matching pattern in the URL configuration. What is the next step after Django finds a matching URL pattern?

A Django immediately renders the template without calling any view.

B Django calls the associated view function or class to handle the request.

C Django sends a 404 error response to the user.

D Django directly queries the database for data.

💡 Hint

Think about what Django does to process the request after matching the URL.

After matching a URL pattern, Django calls the view function or class linked to that pattern. The view handles the request and prepares a response.

❓ state_output

intermediate

What does a Django view typically return?

Consider a simple Django view function. What is the usual type of object that a Django view returns to complete the request?

Django

def my_view(request):
    # some logic here
    return ???

A A Python dictionary with data only.

B A URL string to redirect the user.

C An HttpResponse object containing the content to send back to the browser.

D A database query set.

💡 Hint

Think about what Django needs to send back to the browser.

Django views return an HttpResponse object that holds the content (like HTML) to display in the browser.

📝 Syntax

advanced

Identify the correct way to render a template in a Django view

Which of the following code snippets correctly renders a template named 'home.html' with a context dictionary in a Django view?

A return render(request, 'home.html', {'name': 'Alice'})

B return render_to_response('home.html', {'name': 'Alice'})

C return HttpResponse('home.html', {'name': 'Alice'})

D return render_template('home.html', {'name': 'Alice'})

💡 Hint

Look for the modern Django shortcut function that takes request, template name, and context.

The render function is the recommended way to render templates in Django views. It takes the request, template name, and context dictionary.

🔧 Debug

advanced

Why does this Django view raise a TemplateDoesNotExist error?

Given this view code, why does Django raise a TemplateDoesNotExist error when accessing the URL? ```python def my_view(request): return render(request, 'dashboard.html') ``` Assuming 'dashboard.html' exists in the templates folder.

Django

def my_view(request):
    return render(request, 'dashboard.html')

A The templates folder is not configured correctly in settings.py.

B The view forgot to pass a context dictionary to render.

C The URL pattern is missing for this view.

D The render function is missing the request argument.

💡 Hint

Check if Django knows where to find templates.

If Django cannot find the template file, it usually means the templates directory is not set up properly in the settings.py under TEMPLATES configuration.

🧠 Conceptual

expert

Order of Django request processing steps

Put these Django request processing steps in the correct order from when a user sends a request to when the response is sent back:

A 3,1,2,4

B 2,1,3,4

C 1,3,2,4

D 1,2,3,4

💡 Hint

Think about the natural flow from URL to view to template to response.

The correct order is: Django matches the URL, the view processes the request, the template renders the data, and finally Django sends the response.