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🧱 Django Add Master Template – Build Reusable Layouts with Template Inheritance (2025)

🧲 Introduction – What Is a Master Template?

In Django, a master template (also called a base template) provides a common layout structure—like a header, footer, and navigation bar—that all other pages can inherit. This promotes DRY (Don’t Repeat Yourself) coding, faster updates, and consistent design across your site.

🎯 In this guide, you’ll learn:

How to create a base (master) template
How to extend it in child templates
How to use {% block %} and {% extends %}
Best practices for maintainable template architecture

📁 Step 1: Create the Master Template

Inside your app or a global templates/ directory:

templates/base.html

<!DOCTYPE html>
<html>
<head>
    <title>{% block title %}My Site{% endblock %}</title>
    <link rel="stylesheet" href="{% static 'css/styles.css' %}">
</head>
<body>

<header>
    <h1>My Django Site</h1>
    <nav>
        <a href="/">Home</a> |
        <a href="/blog/">Blog</a>
    </nav>
</header>

<hr>

<main>
    {% block content %}{% endblock %}
</main>

<hr>

<footer>
    <p>&copy; 2025 My Django App</p>
</footer>

</body>
</html>

✅ This becomes your layout foundation with replaceable content blocks.

🧱 Step 2: Use `extends` in a Child Template

Example for a blog post page:

templates/blog/post_detail.html

{% extends 'base.html' %}

{% block title %}{{ post.title }}{% endblock %}

{% block content %}
<h2>{{ post.title }}</h2>
<p>{{ post.content }}</p>
<small>Published on {{ post.published|date:"F j, Y" }}</small>
{% endblock %}

✔️ Only the content that changes needs to be written.

🌐 Step 3: Set the Template Directory in `settings.py`

Make sure Django can find the base.html:

# settings.py
TEMPLATES = [
    {
        ...
        'DIRS': [BASE_DIR / "templates"],
        ...
    }
]

✅ If using app-level templates, structure should be:
yourapp/templates/yourapp/base.html

📋 Common Template Blocks

Block Name	Purpose
`title`	Page title (inside `<title>`)
`content`	Main body content
`sidebar`	Optional side menu or widget
`scripts`	JavaScript at the bottom

✅ Best Practices

Name blocks clearly: content, title, footer, etc.
Don’t repeat layout HTML in every file—use {% extends %}
Centralize common scripts and CSS in base.html
Add {% block scripts %} at the end of <body> for optional JS

📌 Summary – Recap & Next Steps

🔍 Key Takeaways:

A master template ensures layout consistency and reusability
Use {% extends 'base.html' %} to inherit from it
Define {% block %} sections that child templates can override

⚙️ Real-World Relevance:
Master templates power scalable websites, blogs, admin panels, and e-commerce platforms—saving hours in design and code duplication.

❓ Frequently Asked Questions (FAQ)

❓ What is the difference between `include` and `extends`?

✅ extends is for inheritance.
✅ include is for inserting reusable chunks (e.g., header, footer).

❓ Can I have multiple master templates?

✅ Yes. You can have different base templates for admin, public pages, dashboards, etc.

❓ Where should I place the `base.html`?

✅ Either in a global templates/ folder or inside app/templates/app/.

❓ How do I load static files like CSS in base templates?

✅ Use {% load static %} and:

<link href="{% static 'css/style.css' %}" rel="stylesheet">

❓ Can I nest blocks inside other blocks?

✅ Yes, but be cautious. Nesting works, but overdoing it may reduce readability.

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🧱 Django Add Master Template – Build Reusable Layouts with Template Inheritance (2025)

🧲 Introduction – What Is a Master Template?

📁 Step 1: Create the Master Template

🧱 Step 2: Use extends in a Child Template

🌐 Step 3: Set the Template Directory in settings.py