def test_get_fallbacks(self):
self.assertEqual(languages.get_fallbacks('cs'), [])
# Languages has default as fallback
self.assertEqual(languages.get_fallbacks('en'), ['cs'])
self.assertEqual(languages.get_fallbacks('fr'), ['cs'])
# Short language version is a fallback for language
self.assertEqual(languages.get_fallbacks('en-us'), ['en', 'cs'])
def _get_translation(self, language_code, fallback=False, can_create=False):
"""
Returns translation instance for given 'language_code'.
If the translation does not exist:
1. if 'can_create' is True, this function will create one
2. otherwise, if 'fallback' is True, this function will try fallback languages
3. if all of the above fails to find a translation, raise the
TranslationModel.DoesNotExist exception
"""
self._fill_translation_cache(language_code)
translation = self._translation_cache.get(language_code)
if translation is not None:
return translation
if can_create:
translation = self._meta.translation_model(master=self, language_code=language_code)
self._translation_cache[language_code] = translation
return translation
elif fallback:
for language_code in get_fallbacks(language_code):
self._fill_translation_cache(language_code)
translation = self._translation_cache.get(language_code)
if translation is not None:
return translation
raise self._meta.translation_model.DoesNotExist(language_code)
def __get__(self, instance, instance_type=None):
"""
Returns field translation or None
"""
if instance is None:
return self
translation_model = self.model._meta.translation_model
# Find language codes to be tried
lang_codes = [self.language_code]
if self._fallback:
lang_codes += get_fallbacks(self.language_code)
for lang_code in lang_codes:
# Find translation
translation_name = '%s_%s' % (TRANSLATION_FIELD_NAME, sanitize_language_code(lang_code))
try:
# Translation is nullable, so it may return None
translation = getattr(instance, translation_name)
except translation_model.DoesNotExist:
translation = None
if translation is None:
# Translation does not exist, try another language
continue
# Once we have the translation object we return what's there
return getattr(translation, self._field_name)
return None
def test_07_implicit_fallbacks(self):
self.assertEqual(languages.get_fallbacks('en-us'), ['en-us', 'en'])
def test_06_get_fallbacks(self):
self.assertEqual(languages.get_fallbacks('en'), ['en', 'ja'])
self.assertEqual(languages.get_fallbacks('ja'), ['ja', 'en'])
def test02_fallbacks(self):
self.assertEqual(languages.get_fallbacks('cs'), [])
self.assertEqual(languages.get_fallbacks('en'), ['cs'])
self.assertEqual(languages.get_fallbacks('en-us'), ['en', 'cs'])
def test_07_implicit_fallbacks(self):
self.assertEqual(languages.get_fallbacks('en-us'), ['en-us', 'en'])
def test_06_get_fallbacks(self):
self.assertEqual(languages.get_fallbacks('en'), ['en', 'ja'])
self.assertEqual(languages.get_fallbacks('ja'), ['ja', 'en'])
