django-vinaigrette
Vinaigrette translates Django model data -- stored in the database -- using GNU gettext and Django's standard internationalization features.
Installing
Add vinaigrette
to INSTALLED_APPS
in your settings.
Then, tell vinaigrette which fields you want to translate. Because vinaigrette needs to register signals,
you should register your model translations when models have finished loading, in the appropriate apps.py
files
(or wherever you keep your AppConfig
subclasses):
import vinaigrette
class SaladAppConfig(AppConfig):
def ready(self):
# Import the model requiring translation
from .models import Ingredient # or...
Ingredient = self.get_model("Ingredient")
# Register fields to translate
vinaigrette.register(Ingredient, ['name', 'description'])
This tells vinaigrette to translate the name
and description
fields on Ingredient objects.
Using
After installing vinaigrette, the PO files generated by manage.py makemessages
will include
strings from the registered fields. If a particular string is translated, the model value will
be the string translated into the appropriate language:
>>> from django.utils.translation import activate
>>> i = Ingredient(name=u'Lettuce')
>>> i.name
u'Lettuce'
>>> activate('fr')
>>> i.name
u'Laitue'
Et cetera
There are a couple of options to restrict which objects translation strings will be collected
from. See the docstring for vinaigrette.register
.
Vinaigrette adds a --keep-obsolete
option to manage.py makemessages
, which prevents gettext
from deactivating translated messages no longer present in code or in registered database fields.
Vinaigrette is designed for database content that is:
- always edited in the default language
- edited by site administrators, not users
Only model instances are translated. Data accessed via the Django QuerySet values
method will
not be translated.
In general, when a field is accessed, it will always return the translated version, if one exists. However, if a value is set, the exact value entered (and not the translated version) should be saved to the database. For example:
>>> from django.utils.translation import activate
>>> i = Ingredient(name=u'Lettuce')
>>> activate('fr')
>>> i.name
u'Laitue'
>>> i.name = 'Cabbage'
>>> i.name
u'Chou'
>>> i.save()
>>> Ingredient.objects.get(name='Cabbage').name
u'Chou'
Help! The Admin is messing up all the vinaigrette fields whenever I save changes!
Add vinaigrette.middleware.VinaigretteAdminLanguageMiddleware
to your
settings.MIDDLEWARE
to force the admin to always use the main language, and
not have vinaigrette mess with your change views.
Contributing
Testing
- Create a virtualenv for the project
- Install
tox
. When tox is run, it will create the test environments for supported Django and Python versions and then run tests against them