def _validate_fields(schema, value, errors=None):
if errors is None:
errors = []
# Interface can be used as schema property for Object fields that plan to
# hold values of any type.
# Because Interface does not include any Attribute, it is obviously not
# worth looping on its methods and filter them all out.
if schema is Interface:
return errors
# if `value` is part of a cyclic graph, we need to break the cycle to avoid
# infinite recursion. Collect validated objects in a thread local dict by
# it's python represenation. A previous version was setting a volatile
# attribute which didn't work with security proxy
if id(value) in VALIDATED_VALUES:
return errors
VALIDATED_VALUES[id(value)] = True
# (If we have gotten here, we know that `value` provides an interface
# other than zope.interface.Interface;
# iow, we can rely on the fact that it is an instance
# that supports attribute assignment.)
try:
for name in schema.names(all=True):
if not IMethod.providedBy(schema[name]):
try:
attribute = schema[name]
if IChoice.providedBy(attribute):
# Choice must be bound before validation otherwise
# IContextSourceBinder is not iterable in validation
bound = attribute.bind(value)
bound.validate(getattr(value, name, None))
elif IField.providedBy(attribute):
# validate attributes that are fields
attribute.validate(getattr(value, name, None))
except ValidationError as error:
errors.append(error)
except AttributeError as error:
# property for the given name is not implemented
errors.append(SchemaNotFullyImplemented(error))
finally:
del VALIDATED_VALUES[id(value)]
return errors
def _validate_fields(schema, value, errors=None):
if errors is None:
errors = []
# Interface can be used as schema property for Object fields that plan to
# hold values of any type.
# Because Interface does not include any Attribute, it is obviously not
# worth looping on its methods and filter them all out.
if schema is Interface:
return errors
# if `value` is part of a cyclic graph, we need to break the cycle to avoid
# infinite recursion. Collect validated objects in a thread local dict by
# it's python represenation. A previous version was setting a volatile
# attribute which didn't work with security proxy
if id(value) in VALIDATED_VALUES:
return errors
VALIDATED_VALUES[id(value)] = True
# (If we have gotten here, we know that `value` provides an interface
# other than zope.interface.Interface;
# iow, we can rely on the fact that it is an instance
# that supports attribute assignment.)
try:
for name in schema.names(all=True):
if not IMethod.providedBy(schema[name]):
try:
attribute = schema[name]
if IChoice.providedBy(attribute):
# Choice must be bound before validation otherwise
# IContextSourceBinder is not iterable in validation
bound = attribute.bind(value)
bound.validate(getattr(value, name, None))
elif IField.providedBy(attribute):
# validate attributes that are fields
attribute.validate(getattr(value, name, None))
except ValidationError as error:
errors.append(error)
except AttributeError as error:
# property for the given name is not implemented
errors.append(SchemaNotFullyImplemented(error))
finally:
del VALIDATED_VALUES[id(value)]
return errors