def __setattr__(cls, key, value):
if '__mapper__' in cls.__dict__:
if isinstance(value, Column):
_undefer_column_name(key, value)
cls.__table__.append_column(value)
cls.__mapper__.add_property(key, value)
elif isinstance(value, MapperProperty):
cls.__mapper__.add_property(key, _deferred_relation(cls, value))
else:
MetaHasTraits.__setattr__(cls, key, value)
else:
MetaHasTraits.__setattr__(cls, key, value)
def __init__(cls, classname, bases, dict_):
if '_decl_class_registry' in cls.__dict__:
return MetaHasTraits.__init__(cls, classname, bases, dict_)
# create sql columns from flagged traits
if '__class_traits__' in cls.__dict__:
traits = cls.__dict__['__class_traits__']
for key, trait in traits.items():
if getattr( trait, 'sqldb' ):
args = getattr( trait, 'col_args' ) or ()
kwargs = getattr( trait, 'col_kwargs' ) or {}
if 'name' not in kwargs:
kwargs['name'] = key
if 'type_' not in kwargs:
kwargs['type_'] = eval(TRAIT_MAPPING[type(trait.trait_type)])
c = Column(*args, **kwargs)
dict_[key] = c
_as_declarative(cls, classname, dict_)
return MetaHasTraits.__init__(cls, classname, bases, dict_)