Template includes for reusability in Django - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of using template includes in Django?

Template includes let you reuse parts of HTML code across different pages. This helps keep your templates clean and avoids repeating the same code.

beginner

How do you include one template inside another in Django?

Use the {% include 'template_name.html' %} tag inside your main template to insert the content of another template.

intermediate

Can you pass variables to an included template in Django? If yes, how?

Yes, you can pass variables using {% include 'template.html' with var1=value1 var2=value2 %}. The included template can then use these variables.

intermediate

What happens if the included template file does not exist?

Django will raise a TemplateDoesNotExist error unless you use ignore missing like {% include 'file.html' ignore missing %}, which skips the error and shows nothing.

beginner

Why is using template includes better than copying and pasting HTML code?

Using includes means you only update code in one place. This reduces mistakes and saves time when you want to change shared parts like headers or footers.

Which Django template tag is used to insert one template inside another?

A {% include 'template.html' %}

B {% import 'template.html' %}

C {% extend 'template.html' %}

D {% load 'template.html' %}

The correct tag to include a template is {% include 'template.html' %}.

How can you pass a variable named 'user' to an included template?

A {% include 'file.html' with user=user %}

B {% include 'file.html' user=user %}

C {% include 'file.html' set user=user %}

D {% include 'file.html' pass user=user %}

You pass variables using the 'with' keyword: {% include 'file.html' with user=user %}.

What does the 'ignore missing' option do in an include tag?

A It caches the included template

B It loads a default template instead

C It shows an error message on the page

D It skips the error if the included template is missing

'ignore missing' prevents errors if the template file is not found and simply shows nothing.

Why should you use template includes instead of copying HTML code?

A To avoid using CSS

B To make templates load faster

C To keep code DRY and easier to maintain

D To prevent JavaScript errors

Includes help keep code DRY (Don't Repeat Yourself) and easier to update.

Which of these is NOT a valid use of the include tag?

A {% include 'header.html' %}

B {% include 'base.html' extends %}

C {% include 'sidebar.html' ignore missing %}

D {% include 'footer.html' with year=2024 %}

'extends' is a different tag and cannot be combined with include like that.

Explain how template includes improve code reusability in Django projects.

Think about how you would share a header or footer across many pages.

Describe how to pass data to an included template and why it might be useful.

Passing variables lets the included template show different content.