Django makemessages未检测到可翻译字符串

Question

In an app 'purchase', there is a file reports.py. In this app, I'm generating some pdf-reports that sometimes I want to translate to the Czech language. Unfortunately the makemessages script doesn't detect the translatable strings.

Running the following shows that reports.py is being processed. But no files are added.

.././manage.py makemessages -l cs_CZ -v 2
processing file reports.py in .
processing locale cs_CZ

This is a snippet from the reports.py file:

from django.utils.translation import ugettext as trans

def purchase_order_report(purchase_order, language='en'):
    ...
    doc.add_text(trans('Items requested'), 'Heading2')
    ...

The Locale folder is setup like this:

LOCALE_PATHS = (
    os.path.join(BASE_DIR, "locale"),
)

---

Edit: It seems that django makemessages is not correctly translating the import.

Running the following works (but may conflict when unpacking variables to _):

from django.utils.translation import ugettext as _

def purchase_order_report(purchase_order, language='en'):
    ...
    doc.add_text(_('Items requested'), 'Heading2')
    ...

Running the following works as well (but is not very handy if you want to mix and match ugettext and ugettext_lazy):

from django.utils.translation import ugettext

def purchase_order_report(purchase_order, language='en'):
    ...
    doc.add_text(ugettext('Items requested'), 'Heading2')
    ...

Any thoughts?

Answer 1

Apps should have a locale dir of their own. But it's not created if it does not exist. Create the directory within the app and then it should work.

Answer 2

The xgettext GNU command accepts a --keyword=KEYWORD option in order to detect additionnal keywords.

I tried the following command in my shell and the result was as expected :

xgettext -o - --from-code=UTF-8 -L Python -d django -ktrans reports.py

Sadly, it seems that there is not any way to pass this option through the makemessages Django (2.1) command yet :'(
The keywords are hardcoded in the django/core/management/commands/makemessage.py file (around line 570).