def _get_cached_values(instance, translated_model, language_code, use_fallback=False):
"""
Fetch an cached field.
"""
if not appsettings.PARLER_ENABLE_CACHING or not instance.pk or instance._state.adding:
return None
key = get_translation_cache_key(translated_model, instance.pk, language_code)
values = cache.get(key)
if not values:
return None
# Check for a stored fallback marker
if values.get('__FALLBACK__', False):
# Internal trick, already set the fallback marker, so no query will be performed.
instance._translations_cache[translated_model][language_code] = MISSING
# Allow to return the fallback language instead.
if use_fallback:
lang_dict = get_language_settings(language_code)
if lang_dict['fallback'] != language_code:
return _get_cached_values(instance, translated_model, lang_dict['fallback'], use_fallback=False)
return None
values['master'] = instance
values['language_code'] = language_code
return values
def _get_cached_values(instance, translated_model, language_code, use_fallback=False):
"""
Fetch an cached field.
"""
if not appsettings.PARLER_ENABLE_CACHING or not instance.pk or instance._state.adding:
return None
key = get_translation_cache_key(translated_model, instance.pk, language_code)
values = cache.get(key)
if not values:
return None
# Check for a stored fallback marker
if values.get("__FALLBACK__", False):
# Internal trick, already set the fallback marker, so no query will be performed.
instance._translations_cache[translated_model][language_code] = MISSING
# Allow to return the fallback language instead.
if use_fallback:
lang_dict = get_language_settings(language_code)
# iterate over list of fallback languages, which should be already
# in proper order
for fallback_lang in lang_dict["fallbacks"]:
if fallback_lang != language_code:
return _get_cached_values(
instance, translated_model, fallback_lang, use_fallback=False
)
return None
values["master"] = instance
values["language_code"] = language_code
return values
def _get_cached_values(instance,
translated_model,
language_code,
use_fallback=False):
"""
Fetch an cached field.
"""
if not appsettings.PARLER_ENABLE_CACHING or not instance.pk or instance._state.adding:
return None
key = get_translation_cache_key(translated_model, instance.pk,
language_code)
values = cache.get(key)
if not values:
return None
# Check for a stored fallback marker
if values.get('__FALLBACK__', False):
# Internal trick, already set the fallback marker, so no query will be performed.
instance._translations_cache[translated_model][language_code] = MISSING
# Allow to return the fallback language instead.
if use_fallback:
lang_dict = get_language_settings(language_code)
if lang_dict['fallback'] != language_code:
return _get_cached_values(instance,
translated_model,
lang_dict['fallback'],
use_fallback=False)
return None
values['master'] = instance
values['language_code'] = language_code
return values
def get_cached_translation(instance, language_code, use_fallback=False):
"""
Fetch an cached translation.
"""
if not appsettings.PARLER_ENABLE_CACHING or not instance.pk or instance._state.adding:
return None
key = get_translation_cache_key(instance._translations_model, instance.pk, language_code)
values = cache.get(key)
if not values:
return None
# Check for a stored fallback marker
if values.get('__FALLBACK__', False):
# Allow to return the fallback language instead.
if use_fallback:
lang_dict = get_language_settings(language_code)
if lang_dict['fallback'] != language_code:
return get_cached_translation(instance, lang_dict['fallback'], use_fallback=False)
return None
values['master'] = instance
values['language_code'] = language_code
translation = instance._translations_model(**values)
translation._state.adding = False
return translation
def get_cached_translation(instance, language_code, use_fallback=False):
"""
Fetch an cached translation.
"""
if not appsettings.PARLER_ENABLE_CACHING or not instance.pk or instance._state.adding:
return None
key = get_translation_cache_key(instance._translations_model, instance.pk,
language_code)
values = cache.get(key)
if not values:
return None
# Check for a stored fallback marker
if values.get('__FALLBACK__', False):
# Allow to return the fallback language instead.
if use_fallback:
lang_dict = get_language_settings(language_code)
if lang_dict['fallback'] != language_code:
return get_cached_translation(instance,
lang_dict['fallback'],
use_fallback=False)
return None
values['master'] = instance
values['language_code'] = language_code
translation = instance._translations_model(**values)
translation._state.adding = False
return translation
