Clarification on inheritance #390

ctrlfeed · 2025-04-09T04:55:57Z

ctrlfeed
Apr 9, 2025

When using inheritance of templates with the {% extends "base.html %} syntax, i am conflicted whether {% call super() %} should in turn require the fields from the super block to be part of the struct defined for the template.
E.g. I have a base.html which has all my general setup, specifically

<!DOCTYPE html>
<html>
	<head>
	<title>{% block title %}{{title}} - {{area}}{% endblock %}</title>
	<script src="./scripts/main.js" />
...

In my specific.html

{% extends "base.html" %}
{%- block title -%}{% call super() %}{% endblock %}
...

I want to set the value of {{area}}, do i need to reiterate the whole structure or is there a way to include the extended struct from the parent in your struct definition?

#[derive(Template)] // this does not find the {title} for the type &SpecificTemplate
#[template(path="specific.html")]
struct SpecificTemplate {
	???
	title: String::from("Specifics"), // this fails, because "no such field"
}

Kijewski · 2025-04-10T06:26:50Z

Kijewski
Apr 10, 2025
Maintainer

What should the code do if a field could not be found? Maybe {% if title is defined %} would work for you?

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ctrlfeed Apr 9, 2025

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Kijewski Apr 10, 2025 Maintainer

ctrlfeed
Apr 9, 2025

Kijewski
Apr 10, 2025
Maintainer