python - what is {% block content %} and {% endblock content %} for in Django?

Question

posted Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

so I just started reading a book on Django (for beginners) and I came across the following code snipet:

<header>

<a href="{% url 'home' %}">Home</a> | <a href="{% url 'about' %}">About</a>

</header>

{% block content %}
{% endblock content %}

Could anyone possibly explain to me what is the use of {% block content %} and {% endblock content %}? Thank you very much in advance!

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1 Reply

深蓝 · Answer 1 · 2021-10-23T19:14:51+0000

block is used for overriding specific parts of a template.

In your case, you have a block named content and this is supposed to be overridden by children that inherit from this template.

From the examples at The Django Docs

Template to be extended, named base.html

<head>
    <link rel="stylesheet" href="style.css">
    <title>{% block title %}My amazing site{% endblock %}</title>
</head>

Overriding Child template

{% extends "base.html" %}

{% block title %}My amazing blog{% endblock %}

"My amazing site" will be overriden by the child and then display "My amazing blog"