Package: lotrek-django-hvad
Model translations made easy.This project adds support for model translations in Django. It is designed to be
unobtrusive, efficient and reliable. On the technical side, it uses an automatically
createdTranslations Modelto store translatable fields in arbitrary
languages with a foreign key to the main model, enabling fast queries.Started in 2011, hvad has grown mature and is now used on large scale applications.Quick links:Documentation.Release notes.Issue tracker.FeaturesSimple- only 3 new queryset methods.Natural- use Django ORM as usual, it just became language aware.Fast- no additional queries for reads, just an inner join to an indexed key.Complete- relationships, custom managers and querysets, proxy models, and abstract models.Batteries included- translation-enabled forms and admin are provided.Reliable- more than 300 test cases and counting.Compatible- follows Django compatibility matrix.Django-hvad also features support forDjango REST framework3.1 or newer, including
translation-aware serializers.Example UsesDeclaring a translatableBookmodel:class Book(TranslatableModel):
    author = models.ForeignKey(Author)
    release = models.Date()

    translations = TranslatedFields(
        title = models.CharField(max_length=250)
    )Thus, only the title will vary based on the language. Release date and
author are shared among all languages. Let’s now create aBookinstance:# The recommended way:
book = Book.objects.language('en').create(
    author = Author.objects.get(name='Antoine de Saint Exupéry'),
    release = datetime.date(1943, 4, 6),
    title = "The Little Prince",
)

# Also works
book = Book(language_code='en')
book.author = Author.objects.get(name='Antoine de Saint Exupéry')
book.release = datetime.date(1943, 4, 6)
book.title = "The Little Prince"
book.save()Providing some translations:book.translate('fr')
book.title = "Le Petit Prince"
book.save()
book.translate('de')
book.title = "Der kleine Prinz"
book.save()Every call totranslate()creates a new translation from scratch and switches
to that translation;save()only saves the latest translation. Let’s now perform
some language-aware queries:Book.objects.all()Compatible by default: returns all objects, without any translated fields attached.
Starting from v1.0, default behavior can be overriden to work like next query:Book.objects.language().all()Returns all objects as translated instances, but only the ones that are translated
into the currect language. You can also specify which language to get, using e.g.:Book.objects.language("en").all()Usual queryset methods work like they always did: let’s get all books as translated instances,
filtering on thetitleattribute, returning those that havePetit Princein their French title, ordered by publication date (in their
French edition):Book.objects.language("fr").filter(title__contains='Petit Prince').order_by('release')Other random examples:# last German book published in year 1948
Book.objects.language("de").filter(release__year=1948).latest()

# other books from the same author as mybook. Cache author as well.
Book.objects.language().select_related('author').filter(author__books=mybook)

# books that have "Django" in their title, regardless of the language
Book.objects.language('all').filter(title__icontains='Django')More examples in thequickstart guide.ReleasesDjango-hvad uses the same release pattern as Django. The following versions
are thus available:Legacy branch 1.8, available throughPyPIand git branchreleases/1.8.x.Stable branch 2.0, available throughPyPIand git branchreleases/2.0.x.Development branch 2.1, available through git branchmaster.Stable branches have minor bugfix releases as needed, with guaranteed compatibility.
See theinstallation guidefor details, or have a look at therelease notes.Thanks toJonas Obrist (https://github.com/ojii) for making django-nani and for helping me with this project.Kristian Øllegaard (https://github.com/KristianOellegaard/) for django-hvad and trusting me
to continue the development.