[Product-Developers] Question about i18n message in python files

[Steve McMahon]

I'm pretty sure that _(u'N/A') is creating a MessageFactory message
object. No translation is done at that point, as the target language
isn't known 'til page rendering.

These message objects are polymorphous, and if you concatenate one to a string:

_(u'N/A') + 'oops'

or even to another message, the result is a string -- not a message.

You need to do the concatenation in the page template.

On Fri, Apr 25, 2008 at 11:25 AM, Jean-Pascal Houde <jphoude at gmail.com> wrote:
> Hi,
>  I have a problem with i18n message factories in python files. Perhaps
>  there's something I don't understand correctly.
>
>  I'm creating a website with PloneGetPaid and trying to add some
>  translations to PGP. Basically, what I noticed is that if I do the
>  following in a view:
>
>     def test(self):
>         return _(u'N/A')
>
>     def test2(self):
>         return _(u'N/A') + 'oops'
>
>  ... and I try to call it from a page template :
>  <div tal:content="view/test" />
>  <div tal:content="view/test2" />
>
>  Only the first string is translated correctly. It seems like the
>  translation is actually occuring during the page template rendering,
>  and not in the python script (print _(u'N/A') doesn't work either --
>  no translation is done). Since the test2 does not return the i18n
>  message itself, but the message with a string appended to it, it's not
>  translated at all.
>
>  I'm not sure if this behavior is normal... That's problematic if you
>  need to create a message from the python script using several message
>  strings, such as "... %s ... %s" % (_(u'message_1'), _(u'message_2'))
>  In this case message_1 and message_2 are not translated.
>
>  That's not the first time I'm seeing this problem. It also happened
>  with another project I did, but I worked around it... Am I doing
>  something wrong?
>
>  Thanks,
>
>  Jean-Pascal
>
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-- 

______________________________________________________

Steve McMahon
Reid-McMahon, LLC
steve at reidmcmahon.com
steve at dcn.org