Cheking if translation exists

8 years ago

Is there a way - in Twig - to check if a specific translation exists in the currently active language (html_lang)?

I tried something like this

TWIG

{% if 'STRING.TRANSLATION.PATH' %}
//do stuff
{% endif %}

But that always equals true, apparently.

Setting translations_fallback to false doesn't help.

Hugh Barnes Regular

Grav Forum Moderators Veteran First Post Conversation Starter Well Liked 577 posts

8 years ago

There may be a simpler way I don't know, but ...

What do you get from the t custom Twig filter (translate string to current language)? What do you get for a result if you output {{ 'MY_STRING'|t }}. If it's empty or undefined, you should be able to simply put an if in front of it, do if .. is defined, if .. is not empty etc.

pamtbaau

Grav Forum Moderators Legend First Post Conversation Starter Well Liked 3127 posts

8 years ago Solution

TLDR: Based on some tests I noticed the following

Is language supported: html_lang in config.system.languages.supported
Is translation available: html_lang == grav.language.getLanguage
Does string have translation: 'TRANSLATE_ME'|t != 'TRANSLATE_ME'

Created a site with the following settings:

YAML

/user/config/system:
    languages:
      supported: (Note: no Spanish)
        - it
        - fr
        - en
      translations: true
      translations_fallback: false
/user/config/site:
    default_lang: en
user/pages/
    01.home (Note: page for supported languages + Spanish)
        default.en.md
        default.fr.md
        default.it.md
        default.es.md

The site has a theme with the following translations:

YAML

languages.yaml: (Note: No Italian, No Spanish)
    fr:
      TRANSLATE_ME: Traduis-moi
    en:
      TRANSLATE_ME: Translate me

The themes partials/base.html.twig looks like:

TWIG

<p>html_lang: {{ html_lang }}<br/>
Is language supported: {{ html_lang in config.system.languages.supported ? 'Yes' : 'No' }}<br/>
html_lang == getLanguage: {{ html_lang == grav.language.getLanguage ? 'Yes' : 'No' }}<br/>
Is translated: {{ 'TRANSLATE_ME'|t == 'TRANSLATE_ME' ? 'No' : 'Yes' }}<br/>
Translation: {{ 'TRANSLATE_ME'|t }}</p>

This setup yielded the following when browsing to the different pages:

YAML

http://localhost/grav-dev/en
    html_lang: en
    Is language supported: Yes
    html_lang == getLanguage: Yes
    Is translated: Yes
    Translation: Translate me

http://localhost/grav-dev/fr
    html_lang: fr
    Is language supported: Yes
    html_lang == getLanguage: Yes
    Is translated: Yes
    Translation: Traduis-moi

http://localhost/grav-dev/it
    html_lang: en
    Is language supported: Yes
    html_lang == getLanguage: No
    Is translated: No
    Translation: TRANSLATE_ME

http://localhost/grav-dev/es -> Page does not exist error
    html_lang: en
    Is language supported: Yes
    html_lang == getLanguage: No
    Is translated: No
    Translation: TRANSLATE_ME

last edited 06/18/18 by pamtbaau

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