def __get__(self, instance, owner):
"""
Returns value from the translation field for the current language, or
value for some another language according to fallback languages, or the
custom fallback value, or field's default value.
"""
if instance is None:
return self
default = NONE
undefined = self.fallback_undefined
if undefined is NONE:
default = self.field.get_default()
undefined = default
langs = resolution_order(get_language(), self.fallback_languages)
for lang in langs:
loc_field_name = build_localized_fieldname(self.field.name, lang)
val = getattr(instance, loc_field_name, None)
if self.meaningful_value(val, undefined):
return val
if mt_settings.ENABLE_FALLBACKS and self.fallback_value is not NONE:
return self.fallback_value
else:
if default is NONE:
default = self.field.get_default()
# Some fields like FileField behave strange, as their get_default() doesn't return
# instance of attr_class, but rather None or ''.
# Normally this case is handled in the descriptor, but since we have overridden it, we
# must mock it up.
if (isinstance(self.field, fields.files.FileField)
and not isinstance(default, self.field.attr_class)):
return self.field.attr_class(instance, self.field, default)
return default
def __get__(self, instance, owner):
"""
Returns value from the translation field for the current language, or
value for some another language according to fallback languages, or the
custom fallback value, or field's default value.
"""
if instance is None:
return self
default = NONE
undefined = self.fallback_undefined
if undefined is NONE:
default = self.field.get_default()
undefined = default
langs = resolution_order(get_language(), self.fallback_languages)
for lang in langs:
loc_field_name = build_localized_fieldname(self.field.name, lang)
val = getattr(instance, loc_field_name, None)
if self.meaningful_value(val, undefined):
return val
if mt_settings.ENABLE_FALLBACKS and self.fallback_value is not NONE:
return self.fallback_value
else:
if default is NONE:
default = self.field.get_default()
# Some fields like FileField behave strange, as their get_default() doesn't return
# instance of attr_class, but rather None or ''.
# Normally this case is handled in the descriptor, but since we have overridden it, we
# must mock it up.
if (isinstance(self.field, fields.files.FileField) and
not isinstance(default, self.field.attr_class)):
return self.field.attr_class(instance, self.field, default)
return default
def __get__(self, instance, owner):
if instance is None:
return self
langs = resolution_order(get_language(), self.fallback_languages)
for lang in langs:
loc_field_name = build_localized_fieldname(self.field_name, lang)
# Localized field name with '_id'
loc_attname = instance._meta.get_field(loc_field_name).get_attname()
val = getattr(instance, loc_attname, None)
if val is not None:
return val
return None
def append_fallback(model, fields):
"""
If translated field is encountered, add also all its fallback fields.
Returns tuple: (set_of_new_fields_to_use, set_of_translated_field_names)
"""
fields = set(fields)
trans = set()
from wagtail_modeltranslation.translator import translator
opts = translator.get_options_for_model(model)
for key, _ in opts.fields.items():
if key in fields:
langs = resolution_order(get_language(), getattr(model, key).fallback_languages)
fields = fields.union(build_localized_fieldname(key, lang) for lang in langs)
fields.remove(key)
trans.add(key)
return fields, trans