def __new__(cls, copy=True):
# If not otherwise provided, set the module to where it was executed
if '__module__' in cls.__dict__:
module_name = cls.__dict__['__module__']
else:
module_name = sys._getframe(1).f_globals['__name__']
attrs = [(k, v) for (k, v) in cls.__dict__.items() if isinstance(v, Value)]
if copy:
attrs = [(k, v.copy()) for (k, v) in attrs]
attrs.sort(lambda a, b: cmp(a[1], b[1]))
for key, attr in attrs:
attr.creation_counter = Value.creation_counter
Value.creation_counter += 1
register_setting(attr)
attr_dict = dict(attrs + [('__module__', module_name)])
# A new class is created so descriptors work properly
# object.__new__ is necessary here to avoid recursion
group = object.__new__(type('Group', (cls,), attr_dict))
group._settings = attrs
from django.contrib.auth.models import Permission
return group
def contribute_to_class(self, cls, name):
# Override module_name and class_name of all registered settings
for attr in self.__class__.__dict__.values():
if isinstance(attr, Value):
attr.module_name = cls.__module__
attr.class_name = cls.__name__
register_setting(attr)
# Create permission for editing settings on the model
permission = (
'can_edit_%s_settings' % cls.__name__.lower(),
'Can edit %s settings' % cls._meta.verbose_name_raw,
)
if permission not in cls._meta.permissions:
# Add a permission for the setting editor
try:
cls._meta.permissions.append(permission)
except AttributeError:
# Permissions were supplied as a tuple, so preserve that
cls._meta.permissions = tuple(cls._meta.permissions + (permission,))
# Finally, place the attribute on the class
setattr(cls, name, GroupDescriptor(self, name))
