包含扩展使用宏嵌入的比较
Twig 中有各种类型的继承和代码重用:
包括
主要目标是代码重用。考虑在 base.html.twig
中使用 header.html.twig
&footer.html.twig
作为例子。
header.html.twig
<nav>
<div>Homepage</div>
<div>About</div>
</nav>
base.html.twig
{% include 'header.html.twig' %}
<main>{% block main %}{% endblock %}</main>
扩展
主要目标是垂直继承。考虑将 base.html.twig
扩展到 homepage.html.twig
和 about.html.twig
中作为例子。
base.html.twig
{% include 'header.html.twig' %}
<main>{% block main %}{% endblock %}</main>
homepage.html.twig
{% extends 'base.html.twig' %}
{% block main %}
<p>You are at the homepage</p>
{% endblock %}
about.html.twig
{% extends 'base.html.twig' %}
{% block main %}
<p>You are at the about page</p>
{% endblock %}
使用
主要目标是水平重用。考虑在 single.product.html.twig
(扩展 product.layout.html.twig
)和 single.service.html.twig
(扩展’service.layout.html.page’)页面中使用 sidebar.product.html.twig
。 (它就像宏,但对于块)
sidebar.html.twig
<aside>{% block sidebar %}{% endblock %}</aside>
single.product.html.twig
{% extends 'product.layout.html.twig' %}
{% use 'sidebar.html.twig' %}
{% block main %}
<p>You are at the product page for product number 123</p>
{% endblock %}
single.service.html.twig
{% extends 'service.layout.html.twig' %}
{% use 'sidebar.html.twig' %}
{% block main %}
<p>You are at the service page for service number 456</p>
{% endblock %}
宏
主要目标是在具有变量的许多模板上具有可重用的标记。考虑一个获取一些变量并输出一些标记的函数。
form.html.twig
{%宏输入(名称,值,类型)%} <input type =“{{type | default(’text’)}}”name =“{{name}}”value =“{{value | e}} “}}”/> {%endmacro%}
profile.service.html.twig
{% import "forms.html.twig" as forms %}
<div>{{ forms.input('username') }}</div>
嵌
主要目标是阻止覆盖。它同时具有 Use
和 Include
的功能。考虑在 product.table.html.twig
&service.table.html.twig
中嵌入 pagination.html.twig
。
pagination.html.twig
<div>
<div>{% block first %}{% endblock %}</div>
{% for i in (min + 1)..(max - 1) %}
<div>{{ i }}</div>
{% endfor %}
<div>{% block last %}{% endblock %}</div>
</div>
product.table.html.twig
{% set min, max = 1, products.itemPerPage %}
{% embed 'pagination.html.twig' %}
{% block first %}First Product Page{% endblock %}
{% block last %}Last Product Page{% endblock %}
{% endembed %}
service.table.html.twig
{% set min, max = 1, services.itemPerPage %}
{% embed 'pagination.html.twig' %}
{% block first %}First Service Page{% endblock %}
{% block last %}Last Service Page{% endblock %}
{% endembed %}
请注意,嵌入文件(此处为 pagination.html.twig
)可以访问当前上下文(min
,max
变量)。你还可以将额外的变量传递给嵌入文件:
pagination.html.twig
<p>{{ count }} items</p>
<div>
<div>{% block first %}{% endblock %}</div>
{% for i in (min + 1)..(max - 1) %}
<div>{{ i }}</div>
{% endfor %}
<div>{% block last %}{% endblock %}</div>
</div>
product.table.html.twig
{% set min, max = 1, products|length %}
{% embed 'pagination.html.twig' with {'count': products|length } %}
{% block first %}First Product Page{% endblock %}
{% block last %}Last Product Page{% endblock %}
{% endembed %}