def __new__(mcs, name, bases, namespace):
namespace['DoesNotExist'] = \
type(name + 'DoesNotExist', (DoesNotExist,), {})
cls = super(NodeMeta, mcs).__new__(mcs, name, bases, namespace)
# needed by Python < 3.5 for unpickling DoesNotExist objects:
cls.DoesNotExist._model_class = cls
if hasattr(cls, '__abstract_node__'):
delattr(cls, '__abstract_node__')
else:
if 'deleted' in namespace:
raise ValueError("Class property called 'deleted' conflicts "
"with neomodel internals.")
for key, value in ((x, y) for x, y in namespace.items()
if isinstance(y, Property)):
value.name, value.owner = key, cls
if hasattr(value, 'setup') and callable(value.setup):
value.setup()
# cache various groups of properies
cls.__required_properties__ = tuple(
name for name, property in cls.defined_properties(
aliases=False, rels=False).items()
if property.required or property.unique_index)
cls.__all_properties__ = tuple(
cls.defined_properties(aliases=False, rels=False).items())
cls.__all_aliases__ = tuple(
cls.defined_properties(properties=False, rels=False).items())
cls.__all_relationships__ = tuple(
cls.defined_properties(aliases=False,
properties=False).items())
cls.__label__ = namespace.get('__label__', name)
cls.__optional_labels__ = namespace.get('__optional_labels__', [])
if config.AUTO_INSTALL_LABELS:
install_labels(cls, quiet=False)
base_label_set = frozenset(cls.inherited_labels())
optional_label_set = set(cls.inherited_optional_labels())
# Construct all possible combinations of labels + optional labels
possible_label_combinations = [
frozenset(set(x).union(base_label_set))
for i in range(1,
len(optional_label_set) + 1)
for x in combinations(optional_label_set, i)
]
possible_label_combinations.append(base_label_set)
for label_set in possible_label_combinations:
if label_set not in db._NODE_CLASS_REGISTRY:
db._NODE_CLASS_REGISTRY[label_set] = cls
else:
raise ClassAlreadyDefined(cls, db._NODE_CLASS_REGISTRY)
return cls
def __new__(mcs, name, bases, namespace):
namespace["DoesNotExist"] = type(name + "DoesNotExist",
(DoesNotExist, ), {})
cls = super(NodeMeta, mcs).__new__(mcs, name, bases, namespace)
# needed by Python < 3.5 for unpickling DoesNotExist objects:
cls.DoesNotExist._model_class = cls
if hasattr(cls, "__abstract_node__"):
delattr(cls, "__abstract_node__")
else:
if "deleted" in namespace:
raise ValueError("Class property called 'deleted' conflicts "
"with neomodel internals.")
for key, value in ((x, y) for x, y in namespace.items()
if isinstance(y, Property)):
value.name, value.owner = key, cls
if hasattr(value, "setup") and callable(value.setup):
value.setup()
# cache various groups of properies
cls.__required_properties__ = tuple(
name for name, property in cls.defined_properties(
aliases=False, rels=False).items()
if property.required or property.unique_index)
cls.__all_properties__ = tuple(
cls.defined_properties(aliases=False, rels=False).items())
cls.__all_aliases__ = tuple(
cls.defined_properties(properties=False, rels=False).items())
cls.__all_relationships__ = tuple(
cls.defined_properties(aliases=False,
properties=False).items())
cls.__label__ = namespace.get("__label__", name)
if config.AUTO_INSTALL_LABELS:
install_labels(cls, quiet=False)
label_set = frozenset(cls.inherited_labels())
if label_set not in db._NODE_CLASS_REGISTRY:
db._NODE_CLASS_REGISTRY[label_set] = cls
else:
raise ClassAlreadyDefined(cls, db._NODE_CLASS_REGISTRY)
return cls