def cache_translations(objects, languages=None, meta=None):
"""
Cache translation objects in given languages to the objects in one fell swoop.
This will iterate a queryset, if one is passed!
:param objects: List or queryset of Translatable models
:param languages: Iterable of languages to fetch. In addition, all "_current_language"s will be fetched
:return: objects
"""
if not objects:
return objects
languages = set(languages or ())
if meta is None:
meta = objects[0]._parler_meta.root # work on base model by default
xlate_model = meta.model
object_map = dict((object.pk, object) for object in objects)
languages.update(set(object._current_language for object in objects))
master_ids = object_map.keys()
# SQLite limits host variables to 999 (see http://www.sqlite.org/limits.html#max_variable_number),
# so we're batching to a number around that, with enough leeway for other binds (`languages` in particular).
for master_ids in batch(master_ids, 950):
for translation in xlate_model.objects.filter(
master_id__in=master_ids, language_code__in=languages):
master = object_map[translation.master_id]
master._translations_cache[xlate_model][
translation.language_code] = translation
# FIXME: setattr(translation, translation.__class__.master.cache_name, master)
return objects
def cache_translations(objects, languages=None, meta=None):
"""
Cache translation objects in given languages to the objects in one fell swoop.
This will iterate a queryset, if one is passed!
:param objects: List or queryset of Translatable models
:param languages: Iterable of languages to fetch. In addition, all "_current_language"s will be fetched
:return: objects
"""
if not objects:
return objects
languages = set(languages or ())
if meta is None:
meta = objects[0]._parler_meta.root # work on base model by default
xlate_model = meta.model
object_map = dict((object.pk, object) for object in objects)
languages.update(set(object._current_language for object in objects))
master_ids = object_map.keys()
# SQLite limits host variables to 999 (see http://www.sqlite.org/limits.html#max_variable_number),
# so we're batching to a number around that, with enough leeway for other binds (`languages` in particular).
for master_ids in batch(master_ids, 950):
for translation in xlate_model.objects.filter(master_id__in=master_ids, language_code__in=languages):
master = object_map[translation.master_id]
master._translations_cache[xlate_model][translation.language_code] = translation
setattr(translation, translation.__class__.master.cache_name, master)
return objects