[英]Multiple blocks of same name in Jinja2
In Jinja2 , I have a base template like this: 在Jinja2中 ,我有一个这样的基本模板:
<title>{% block title %}{% endblock %} - example.com</title>
[...]
<h1>
{% block title %}{% endblock %} - example.com
</h1>
Jinja2, then, fails with the following message: 然后,Jinja2失败并显示以下消息:
lines = [self.message, ' ' + location]
: block 'title' defined twice
It must be now evident as to what I am trying to do - to have the same title in two places: the TITLE tag and the H1 tag, but the part of the title is actually provided by other derived templates. 现在必须明确我要做的事情 - 在两个地方拥有相同的标题:TITLE标签和H1标签,但标题的一部分实际上是由其他派生模板提供的。
How does one typically achieve this? 人们通常如何实现这一目标?
The idea is to create a block inside a macro and then call macro two times, instead of having "block" tag repeated twice. 想法是在宏内部创建一个块,然后调用宏两次,而不是重复两次“block”标记。
In latest Jinja2 version this works: 在最新的Jinja2版本中,这有效:
layout.html 的layout.html
{%- extends "base.html" -%}
{%- macro duplicated() -%}
{% block overrideninchild %}{% endblock %}
{%- endmacro -%}
{% block base_content %}
{{ duplicated() }}
{{ duplicated() }}
{% endblock %}
child_page.html child_page.html
{%- extends "layout.html" -%}
{% block overrideninchild %}
Should be visible twice.
{% endblock %}
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