检查树枝中的YAML字段是否为空

Question

I have two .yml files, in each one of them is a translation of my website. I reference the fields of the .yml files using twig. In one translation I need a field that in the other I don't. So in one translation I have to reference an empty field. But on the website there is not shown nothing but the "path" of the field. So I want to check if the field is not empty, how is it done?

YAML:

title
    1: string
    2: ~

HTML/Twig:

<h4> {{ 'title.1'|trans }}<sup>7</sup>
{% if 'title.2' is not empty %}
     {{ 'title.2'|trans }}
{% endif %}
</h4>

Website: String title.2

Answer 1

With if 'title.2' is not empty you test a concrete string to be empty, which will never be false . Even if '' != 'title.2'|trans might not work as it could fall back to a default language.

---

If you explicitly don't want to show a certain text based on the user's locale then test for that. It also makes your code easier to read and to maintain:

{% if 'en' != app.request.locale %}
    {{ 'title.2'|trans }}                    
{% endif %}

Even shorter:

{{ 'en' != app.request.locale ? 'title.2'|trans }}

---

I would also suggest using short words or phrases to identify translations instead of numbers.