Django modeltranslation - can't get and see original fields

问题

I'm trying to use django-modeltranslation in my project.

For now, just for Tag model with one field - name.

I've created and registered TranslationOptions, then makemigrations and migrate.

Now I can't access the original name text. It seems to be replaced with '' (empty string) but it isn't:

In [6]: Tag.objects.first()
Out[6]: <Tag: >

In [7]: Tag.objects.first().name
Out[7]: u''

In [8]: Tag.objects.first().__dict__
Out[8]: 
{'_state': <django.db.models.base.ModelState at 0x7fc96ad41710>,
 'id': 1,
 'name': u'Sport',
 'name_cs': None,
 'name_de': None,
 'name_en': None,
 'name_es': None,
 'name_fr': None,
 'name_ru': None,
 'name_sk': None}

In [9]: Tag.objects.first().name
Out[9]: u''

Do you know how to access the field/s?

EDIT

models.py

class Tag(models.Model):
    name = models.CharField(max_length=50,verbose_name=u'Tag',unique=True)


    def __unicode__(self):
        return self.name

translation.py

from modeltranslation.translator import register, TranslationOptions

from tags.models import Tag


@register(Tag)
class TagsTranslationOptions(TranslationOptions):
    fields = ('name',)

settings.py

USE_I18N = True
USE_L10N = False
gettext = lambda x: x

LANGUAGE_CODE = 'en'
LANGUAGES = [
    ('en', gettext('EN')),
    ('fr', gettext('FR')),
    ('es', gettext('ES')),
    ('de', gettext('DE')),
    ('ru', gettext('RU')),
    ('sk', gettext('SK')),
    ('cs', gettext('CZ')), ]

The same problem is in Admin:

Detail:

回答1:

According to documentation:

Reading the value from the original field returns the value translated to the current language.

This means that tag.name doesn't return tag.__dict__['name'], but rather tag.__dict__['name_en'] (assuming English is an active language).

It looks like you have added modeltranslation to an existing project and you have existing data. In order to get modeltranslation to work properly, you need to run update_translation_fields, a management command supplied by the app (documentation link). It will copy the data from original field to default translated field (from title to title_en).

来源：https://stackoverflow.com/questions/48440899/django-modeltranslation-cant-get-and-see-original-fields

标签

python

django

django-database

django-2.0

django-modeltranslation