django blocktrans and i18n in templates

django templates internationalization translation
Julien picture Julien · Nov 28, 2009 · Viewed 19.5k times · Source

I have an i18n problem in django:

This works fine : 

{% trans cat.name %}

cat.name will be translated

But this doesn't work: 

{% blocktrans with cat.name|slugify as cat_slug %}{{ cat_slug }}{% endblocktrans %}

cat.name is not translated

If I change the filter : 

{% blocktrans with cat.name|capfirst as cat_slug %}{{ cat_slug }}{% endblocktrans %}

I can see that the filter is working, but there is no translation...

Answer

Tom picture Tom · Dec 21, 2009

I'm only just getting started with Django internationalization, but I think you're misunderstanding how the {% blocktrans %} tag handles placeholders.

The point of blocktrans is to allow the text around the placeholders to be translated. It won't translate anything inside {{...}}.

If you look at the generated .po file, you'll see that the following template code:

{% blocktrans %}This is my variable: {{variable}}{% endblocktrans %}

Will get converted into something like the following:

msgid:"This is my variable: %s"

I don't think you can translate a variable within a blocktrans tag. You can probably do constant strings with {% blocktrans with _("string") as x %}{{x}}{% endblocktrans %} but I can't think why you'd want to.

You'll have to do what you want in your view or model code I think.

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