models.py

multilingual-ng and django-hvad share the same database schema. This means that converting a project from ng to hvad should generally be possible without schema migrations. A ng model can be converted into a hvad model like this:

multilingual-ng

class MyModel(models.Model):
    is_published = models.BooleanField()

    class Translation(multilingual.Translation):
        name = models.CharField(max_length=100)
        slug = models.SlugField(max_length=100)

    def __unicode__(self):
        return self.name

hvad

from nani.models import TranslatableModel, TranslatedFields

class MyModel(TranslatableModel):
    is_published = models.BooleanField()

    translations = TranslatedFields(
        name = models.CharField(max_length=100),
        slug = models.SlugField(max_length=100),
    )

    def __unicode__(self):
        return self.safe_translation_getter('name', unicode(self.pk))

Notes

• a field is only accessible if it is translated in the current language (inefficient fallback methods notwithstanding). You should never try to access a translated field directly in unicode(). Instead, use self.safe_translation_getter().
• Don’t try to mix hvad models with django-polymorphic, GeoDjango, django-mptt or generally model subclasses that depend on their own Manager and QuerySet implementations. You will fail. Hard. Really. Don’t do it. Honestly.