php 是否有用于输出条件文本的 Twig 速记语法
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Is there a Twig shorthand syntax for outputting conditional text
提问by Justin
Is there a shorter syntax in Twig to output a conditional string of text?
Twig 中是否有更短的语法来输出条件文本字符串？
<h1>{% if not info.id %}create{% else %}edit{% endif %}</h1>
Traditional php is even easier than this:
传统的 php 甚至比这更容易：
<h1><?php info['id']? 'create' : 'edit' ?></h1>
回答by mcriecken
This should work:
这应该有效：
{{ not info.id ? 'create' : 'edit' }}
Also, this is called the ternary operator. It's kind of hidden in the documenation: twig docs: operators
此外，这称为三元运算符。它有点隐藏在文档中：twig docs: operators
From their documentation the basic structure is:
从他们的文档来看，基本结构是：
{{ foo ? 'yes' : 'no' }}
回答by Raja Khoury
If you need to compare the value is equal to something you can do :
如果您需要比较值是否等于您可以执行的操作：
{{ user.role == 'admin' ? 'is-admin' : 'not-admin' }}
You can use the Elvis Operator inside twig :
您可以在 twig 中使用 Elvis Operator：
{{ user ? 'is-user' }}
{{ user ?: 'not-user' }} // note that it evaluates to the left operand if true ( returns the user ) and right if not
回答by danigore
The null-coalescing operatoralso working, like:
该空凝聚运营商也在努力，比如：
{% set avatar = blog.avatar ?? 'https://example.dev/brand/avatar.jpg' %}
